面向对象程序设计教程 答案
C面向对象程序设计课后习题答案1~14章
c2=getchar(); //将输入的第二个字符赋给c2
cout<<"用putchar函数输出结果为:";
putchar(c1);
putchar(44);
putchar(c2);
cout<<endl;
cout<<"用cout语句输出结果为:";
putchar(c2);
cout<<endl;
cout<<"用cout语句输出结果为:";
cout<<c1<<c2<<endl;
return 0;
}
3-4-1、#include <iostream>
using namespace std;
int main ( )
{char c1,c2;
cout<<"请输入两个字符c1,c2:";
cout<<"please enter score of student:";
cin>>score;
while (score>100||score<0)
{cout<<"data error,enter data again.";
cin>>score;
}
switch(int(score/10))
{case 10:
else m=y;
if (z<m) m=z;
return(m);
}
1-8、#include <iostream>
c++面向对象程序设计课后习题答案(谭浩强版)
第一章5:#include <iostream>using namespace std;int main(){cout<<"This"<<"is";cout<<"a"<<"C++";cout<<"program."<<endl; return 0;}6:#include <iostream>using namespace std;int main(){int a,b,c;a=10;b=23;c=a+b;cout<<"a+b=";cout<<c;cout<<endl;return 0;}7:#include <iostream>using namespace std;int main(){int a,b,c;int f(int x,int y,int z); cin>>a>>b>>c;c=f(a,b,c);cout<<c<<endl;return 0;}int f(int x,int y,int z){int m;if (x<y) m=x;else m=y;if (z<m) m=z;return(m);}8: #include <iostream> using namespace std;int main(){int a,b,c;cin>>a>>b;c=a+b;cout<<"a+b="<<a+b<<endl; return 0;}9:#include <iostream>using namespace std;int main(){int add(int x,int y);int a,b,c;cin>>a>>b;c=add(a,b);cout<<"a+b="<<c<<endl; return 0;}int add(int x,int y){int c;c=x+y;return(c);}10:#include <iostream>using namespace std;int main(){void sort(int x,int y,int z);int x,y,z;cin>>x>>y>>z;sort(x,y,z);return 0;}void sort(int x, int y, int z){int temp;if (x>y) {temp=x;x=y;y=temp;} //{ }内3个语句的作用是将x和y的值互换) if (z<x) cout<<z<<','<<x<<','<<y<<endl;else if (z<y) cout<<x<<','<<z<<','<<y<<endl;else cout<<x<<','<<y<<','<<z<<endl;}11:#include <iostream>using namespace std;int main(){int max(int a,int b,int c=0);int a,b,c;cin>>a>>b>>c;cout<<"max(a,b,c)="<<max(a,b,c)<<endl;cout<<"max(a,b)="<<max(a,b)<<endl;return 0;}int max(int a,int b,int c){if(b>a) a=b;if(c>a) a=c;return a;}12:#include <iostream>using namespace std;int main(){void change(int ,int );int a,b;cin>>a>>b;if(a<b) change(a,b);cout<<"max="<<a<<" min="<<b<<endl;return 0;}void change(int ,int ){int r1,r2,temp;temp=r1;r1=r2;r2=temp;}13:#include <iostream>using namespace std;int main(){void sort(int &,int &,int &);int a,b,c,a1,b1,c1;cout<<"Please enter 3 integers:";cin>>a>>b>>c;a1=a;b1=b;c1=c;sort(a1,b1,c1);cout<<a<<" "<<b<<" "<<c<<" in sorted order is "; cout<<a1<<" "<<b1<<" "<<c1<<endl;return 0;}void sort(int &i,int &j,int &k){ void change(int &,int &);if (i>j) change(i,j);if (i>k) change(i,k);if (j>k) change(j,k);}void change(int &x,int &y){ int temp;temp=x;x=y;y=temp;}14:#include <iostream>#include <string>using namespace std;int main(){ string s1="week",s2="end";cout<<"s1="<<s1<<endl;cout<<"s2="<<s2<<endl;s1=s1+s2;cout<<"The new string is:"<<s1<<endl;return 0;}15:#include <iostream>#include <string>using namespace std;int main(){ string str;int i,n;char temp;cout<<"please input a string:";cin>>str;n=str.size();for(i=0;i<n/2;i++){temp=str[i];str[i]=str[n-i-1];str[n-i-1]=temp;}cout<<str<<endl;return 0;}16:#include <iostream>#include <string>using namespace std;int main(){ int i;string str[5]={"BASIC","C","FORTRAN","C++","PASCAL"}; void sort(string []);sort(str);cout<<"the sorted strings :"<<endl;for(i=0;i<5;i++)cout<<str[i]<<" ";cout<<endl;return 0;}void sort(string s[]){int i,j;string t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (s[i]>s[i+1]){t=s[i];s[i]=s[i+1];s[i+1]=t;}}17: #include <iostream>#include <string>using namespace std;int main(){long c[5]={10100,-123567, 1198783,-165654, 3456}; int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 };void sort(int []);void sort(float []);void sort(long []);sort(a);sort(b);sort(c);return 0;}void sort(int a[]){int i,j,t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(long a[]){int i,j;long t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(float a[]){int i,j;float t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}18: #include <iostream>#include <string>using namespace std;template <typename T>void sort(T a[]){int i,j,min;T t;for(i=0;i<5;i++){min=i;for (j=i+1;j<5;j++)if(a[min]>a[j]) min=j;t=a[i]; a[i]=a[min]; a[min]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}int main(){ int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 };long c[5]={10100,-123567, 1198783,-165654, 3456}; sort(a);sort(b);sort(c);return 0;}第二章1#include <iostream>using namespace std;class Time{public:void set_time();void show_time();private: //成员改为公用的int hour;int minute;int sec;};void Time::set_time() //在main函数之前定义{cin>>hour;cin>>minute;cin>>sec;}void Time::show_time() //在main函数之前定义{cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1;t1.set_time();t1.show_time();return 0;}2：#include <iostream>using namespace std;class Time{public:void set_time(void){cin>>hour;cin>>minute;cin>>sec;}void show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}private: int hour;int minute;int sec;};Time t;int main(){t.set_time();t.show_time();return 0;}3：#include <iostream>using namespace std;class Time{public:void set_time(void);void show_time(void);private:int hour;int minute;int sec;};void Time::set_time(void){cin>>hour;cin>>minute;cin>>sec;}void Time::show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}Time t;int main(){ t.set_time();t.show_time();return 0;}4：//xt2-4-1.cpp(main.cpp)#include <iostream>using namespace std;#include "xt2-4.h"int main(){Student stud;stud.set_value();stud.display();return 0;}//xt2-4-2.cpp(即student.cpp)#include "xt2-4.h" //在此文件中进行函数的定义#include <iostream>using namespace std; //不要漏写此行void Student::display( ){ cout<<"num:"<<num<<endl;cout<<"name:"<<name<<endl;cout<<"sex:"<<sex<<endl;}void Student::set_value(){ cin>>num;cin>>name;cin>>sex;}5：//xt2-5-1.cpp(file1.cpp)#include <iostream>#include "xt2-5.h"int main(){Array_max arrmax;arrmax.set_value();arrmax.max_value();arrmax.show_value();return 0;}//xt2-5-2.cpp(arraymax.cpp)#include <iostream>using namespace std;#include "xt2-5.h"void Array_max::set_value(){ int i;for (i=0;i<10;i++)cin>>array[i];}void Array_max::max_value(){int i;max=array[0];for (i=1;i<10;i++)if(array[i]>max) max=array[i];}void Array_max::show_value(){cout<<"max="<<max<<endl;}6：解法一#include <iostream>using namespace std;class Box{public:void get_value();float volume();void display();public:float lengh;float width;float height;};void Box::get_value(){ cout<<"please input lengh, width,height:";cin>>lengh;cin>>width;cin>>height;}float Box::volume(){ return(lengh*width*height);}void Box::display(){ cout<<volume()<<endl;}int main(){Box box1,box2,box3;box1.get_value();cout<<"volmue of bax1 is ";box1.display();box2.get_value();cout<<"volmue of bax2 is ";box2.display();box3.get_value();cout<<"volmue of bax3 is ";box3.display();return 0;}解法二：#include <iostream>using namespace std;class Box{public:void get_value();void volume();void display();public:float lengh;float width;float height;float vol;};void Box::get_value(){ cout<<"please input lengh, width,height:";cin>>lengh;cin>>width;cin>>height;}void Box::volume(){ vol=lengh*width*height;}void Box::display(){ cout<<vol<<endl;}int main(){Box box1,box2,box3;box1.get_value();box1.volume();cout<<"volmue of bax1 is ";box1.display();box2.get_value();box2.volume();cout<<"volmue of bax2 is ";box2.display();box3.get_value();box3.volume();cout<<"volmue of bax3 is ";box3.display();return 0;}第三章2:#include <iostream>using namespace std;class Date{public:Date(int,int,int);Date(int,int);Date(int);Date();void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }Date::Date(int m,int d):month(m),day(d){year=2005;}Date::Date(int m):month(m){day=1;year=2005;}Date::Date(){month=1;day=1;year=2005;}void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d3(10);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}3:#include <iostream>using namespace std;class Date{public:Date(int=1,int=1,int=2005);void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d3(10);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}4:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void display();private:int num;float score;};void Student::display(){cout<<num<<" "<<score<<endl;}int main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};Student *p=stud;for(int i=0;i<=2;p=p+2,i++)p->display();return 0;}5:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}int num;float score;};void main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};void max(Student* );Student *p=&stud[0];max(p);}void max(Student *arr){float max_score=arr[0].score;int k=0;for(int i=1;i<5;i++)if(arr[i].score>max_score) {max_score=arr[i].score;k=i;} cout<<arr[k].num<<" "<<max_score<<endl;}6:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display(){cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}7: 解法一#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;}//可改为:void display() const {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){const Studentstud(101,78.5);stud.display();//stud.change(101,80.5);stud.display();return 0;}解法二：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) const {num=n;score=s;}void display() const {cout<<num<<" "<<score<<endl;}private:mutable int num;mutable float score;};int main(){const Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}解法三：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);Student *p=&stud;p->display();p->change(101,80.5);p->display();return 0;}8：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);void fun(Student&);fun(stud);return 0;}void fun(Student &stu){stu.display();stu.change(101,80.5);stu.display();}9：#include <iostream>using namespace std;class Product{public:Product(int n,int q,float p):num(n),quantity(q),price(p){};void total();static float average();static void display();private:int num;int quantity;float price;static float discount;static float sum;static int n;};void Product::total(){float rate=1.0;if(quantity>10) rate=0.98*rate;sum=sum+quantity*price*rate*(1-discount);n=n+quantity;}void Product::display(){cout<<sum<<endl;cout<<average()<<endl;}float Product::average(){return(sum/n);}float Product::discount=0.05;float Product::sum=0;int Product::n=0;int main(){Product Prod[3]={Product(101,5,23.5),Product(102,12,24.56),Product(103,100,21.5) };for(int i=0;i<3;i++)Prod[i].total();Product::display();return 0;}10：#include <iostream>using namespace std;class Date;class Time{public:Time(int,int,int);friend void display(const Date &,const Time &);private:int hour;int minute;int sec;};Time::Time(int h,int m,int s){hour=h;minute=m;sec=s;}class Date{public:Date(int,int,int);friend void display(const Date &,const Time &);private:int month;int day;int year;};Date::Date(int m,int d,int y){month=m;day=d;year=y;}void display(const Date &d,const Time &t){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl; cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);display(d1,t1);return 0;}11：#include <iostream>using namespace std;class Time;class Date{public:Date(int,int,int);friend Time;private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y){ }class Time{public:Time(int,int,int);void display(const Date &);private:int hour;int minute;int sec;};Time::Time(int h,int m,int s):hour(h),minute(m),sec(s){ }void Time::display(const Date &d){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl;cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);t1.display(d1);return 0;}12：#include <iostream>using namespace std;template<class numtype>class Compare{public:Compare(numtype a,numtype b);numtype max();numtype min();private:numtype x,y;};template <class numtype>Compare<numtype>::Compare(numtype a,numtype b){x=a;y=b;}template <class numtype>numtype Compare<numtype>::max(){return (x>y)?x:y;}template <class numtype>numtype Compare<numtype>::min(){return (x<y)?x:y;}int main(){Compare<int> cmp1(3,7);cout<<cmp1.max()<<" is the Maximum of two integer numbers."<<endl;cout<<cmp1.min()<<" is the Minimum of two integer numbers."<<endl<<endl; Compare<float> cmp2(45.78,93.6);cout<<cmp2.max()<<" is the Maximum of two float numbers."<<endl;cout<<cmp2.min()<<" is the Minimum of two float numbers."<<endl<<endl;Compare<char> cmp3('a','A');cout<<cmp3.max()<<" is the Maximum of two characters."<<endl;cout<<cmp3.min()<<" is the Minimum of two characters."<<endl;return 0;}第四章1:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}double get_real();double get_imag();void display();private:double real;double imag;};double Complex::get_real(){return real;}double Complex::get_imag(){return imag;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator + (Complex &c1,Complex &c2){return Complex(c1.get_real()+c2.get_real(),c1.get_imag()+c2.get_imag()); }int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c3=";c3.display();return 0;2:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator-(Complex &c2);Complex operator*(Complex &c2);Complex operator/(Complex &c2);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c2){Complex c;c.real=real+c2.real;c.imag=imag+c2.imag;return c;}Complex Complex::operator-(Complex &c2){Complex c;c.real=real-c2.real;c.imag=imag-c2.imag;return c;}Complex Complex::operator*(Complex &c2){Complex c;c.real=real*c2.real-imag*c2.imag;c.imag=imag*c2.real+real*c2.imag;return c;}Complex Complex::operator/(Complex &c2){Complex c;c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag); return c;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c1+c2=";c3.display();c3=c1-c2;cout<<"c1-c2=";c3.display();c3=c1*c2;cout<<"c1*c2=";c3.display();c3=c1/c2;cout<<"c1/c2=";c3.display();return 0;}3:#include <iostream> //用VC++时改为∶#include <iostream.h> using namespace std; //用VC++时为取消此行class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator+(int &i);friend Complex operator+(int&,Complex &);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c){return Complex(real+c.real,imag+c.imag);}Complex Complex::operator+(int &i){return Complex(real+i,imag);}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator+(int &i,Complex &c){return Complex(i+c.real,c.imag);}int main(){Complex c1(3,4),c2(5,-10),c3;int i=5;c3=c1+c2;cout<<"c1+c2=";c3.display();c3=i+c1;cout<<"i+c1=";c3.display();c3=c1+i;cout<<"c1+i=";c3.display();return 0;}4:#include <iostream>using namespace std;class Matrix //定义Matrix类{public:Matrix(); //默认构造函数friend Matrix operator+(Matrix &,Matrix &); //重载运算符“+”void input(); //输入数据函数void display(); //输出数据函数private:int mat[2][3];};Matrix::Matrix() //定义构造函数{for(int i=0;i<2;i++)for(int j=0;j<3;j++)mat[i][j]=0;}Matrix operator+(Matrix &a,Matrix &b) //定义重载运算符“+”函数{Matrix c;for(int i=0;i<2;i++)for(int j=0;j<3;j++){c.mat[i][j]=a.mat[i][j]+b.mat[i][j];}return c;}void Matrix::input() //定义输入数据函数{cout<<"input value of matrix:"<<endl;for(int i=0;i<2;i++)for(int j=0;j<3;j++)cin>>mat[i][j];}void Matrix::display() //定义输出数据函数{for (int i=0;i<2;i++){for(int j=0;j<3;j++){cout<<mat[i][j]<<" ";}cout<<endl;}}int main(){Matrix a,b,c;a.input();b.input();cout<<endl<<"Matrix a:"<<endl;a.display();cout<<endl<<"Matrix b:"<<endl;b.display();c=a+b; //用重载运算符“+”实现两个矩阵相加cout<<endl<<"Matrix c = Matrix a + Matrix b :"<<endl;c.display();return 0;}5:#include <iostream.h>//using namespace std;class Matrix{public:Matrix();friend Matrix operator+(Matrix &,Matrix &);friend ostream& operator<<(ostream&,Matrix&);friend istream& operator>>(istream&,Matrix&);private:int mat[2][3];};Matrix::Matrix(){for(int i=0;i<2;i++)for(int j=0;j<3;j++)mat[i][j]=0;}Matrix operator+(Matrix &a,Matrix &b){Matrix c;for(int i=0;i<2;i++)for(int j=0;j<3;j++){c.mat[i][j]=a.mat[i][j]+b.mat[i][j];}return c;}istream& operator>>(istream &in,Matrix &m){cout<<"input value of matrix:"<<endl;for(int i=0;i<2;i++)for(int j=0;j<3;j++)in>>m.mat[i][j];return in;}ostream& operator<<(ostream &out,Matrix &m){for (int i=0;i<2;i++){for(int j=0;j<3;j++){out<<m.mat[i][j]<<" ";}out<<endl;}return out;}int main(){ Matrix a,b,c;cin>>a;cin>>b;cout<<endl<<"Matrix a:"<<endl<<a<<endl;cout<<endl<<"Matrix b:"<<endl<<b<<endl;c=a+b;cout<<endl<<"Matrix c = Matrix a + Matrix b :"<<endl<<c<<endl; return 0;}6:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r){real=r;imag=0;}Complex(double r,double i){real=r;imag=i;}operator double(){return real;}void display();private:double real;double imag;};void Complex::display(){cout<<"("<<real<<", "<<imag<<")"<<endl;}int main(){Complex c1(3,4),c2;double d1;d1=2.5+c1;cout<<"d1="<<d1<<endl;c2=Complex(d1);cout<<"c2=";c2.display();return 0;}7:#include <iostream>using namespace std;class Student{public:Student(int,char[],char,float);int get_num(){return num;}char * get_name(){return name;}char get_sex(){return sex;}void display(){cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\nscore:"<<score<<"\n\n";} private:int num;char name[20];char sex;float score;};Student::Student(int n,char nam[],char s,float so){num=n;strcpy(name,nam);sex=s;score=so;}class Teacher{public:Teacher(){}Teacher(Student&);Teacher(int n,char nam[],char sex,float pay);void display();private:int num;char name[20];char sex;float pay;};Teacher::Teacher(int n,char nam[],char s,float p){num=n;strcpy(name,nam);sex=s;pay=p;}Teacher::Teacher(Student& stud){num=stud.get_num();strcpy(name,stud.get_name());sex=stud.get_sex();pay=1500;}void Teacher::display(){cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\npay:"<<pay<<"\n\n";}int main(){Teacher teacher1(10001,"Li",'f',1234.5),teacher2;Student student1(20010,"Wang",'m',89.5);cout<<"student1:"<<endl;student1.display();teacher2=Teacher(student1);cout<<"teacher2:"<<endl;teacher2.display();return 0;}第五章1:。
C++程序设计教程--面向对象分册完整答案
第1章类和对象一、选择题8 C 9A 10 C二、阅读题1．x=2,y=32．x=2,y=3x!=y3．Cstatic::va1=0=1=2=4=4四、改错题#include <>#include <>class person{public:person(int n,char* nam,char s) {num=n;strcpy(name,nam);sex=s;cout<<"Constructor called."<<endl;}~person( ){cout<<"Destructor called."<<endl;}void display( ){cout<<"num: "<<num<<endl;cout<<"name: "<<name<<endl;cout<<"sex: "<<sex<<endl<<endl;}private:int num;char name[10];char sex;};int main( ){person s1(10010,"'Wang_li",'f');( );person s2(10011,"Zhang_fun",'m');( );return 0;}五、编程题5．1#include <iostream>using namespace std;class CBox{public :CBox(double l=0,double w=0,double h=0);double area();double volume ();private :double lengh;double width;double high;};CBox::CBox(double l,double w,double h){lengh=l;width=w;high=h;}double CBox::area(){return 2*(lengh*width+lengh*high+width*high); }double CBox::volume (){return lengh*width*high;}void main(){CBox box1(4,5,6);cout<<()<<endl;cout<<()<<endl;}#include <iostream>using namespace std;class CPoint{public :CPoint(double a=0,double b=0){x=a;y=b;}CPoint(CPoint & p){x=;y=;}void print(){cout<<"("<<x<<","<<y<<")";}private :double x,y;};class CLine{public:CLine(double x1=0,double y1=0,double x2=0,double y2=0):p1(x1,y1),p2(x2,y2) {}CLine(CPoint x,CPoint y):p1(x),p2(y){}CLine(CLine &lin){p1=;p2=;}void DrawLine(){cout<<"Line form";();cout<<"to";();cout<<endl;}void Linedel(){cout<<"delete line"<<endl;}void move(CPoint &x,CPoint &y){cout<<"move line"<<endl;p1=x;p2=y;}private :CPoint p1,p2;};void main(){CPoint point1(1,5),point2(5,8),point3(20,30),point4(40,50);CLine line1(point1,point2);CLine line2(2,3,8,12);();();(point3,point4);();line2=line1;();();}#include <iostream>using namespace std;class CComplex{public:CComplex(double, double);CComplex(CComplex &c); <<endl;}char CString::GetAt(int nindex) const{if(nindex>1&&nindex<=GetLength()+1)return s[ nindex-1];elsereturn '0';}void CString::Setat(int nindex,char ch){if(nindex>1&&nindex<=GetLength()+1)s[ nindex-1]=ch;}void CString::Print(){cout<<s<<endl;}int CString::compare(CString& string){if(strcmp(s,>0)return 1;else if(strcmp(s,<0)return -1;elsereturn 0;}int CString::compare(const char* psz)const {if(strcmp(s,psz)>0)return 1;else if(strcmp(s,psz)<0)return -1;else return 0;}CString::~CString(){<<endl;elsecout<<"String isn't empty."<<endl;cout<<"下面是判断字符串c1清空"<<endl;();cout<<"清空后输出字符串c1:"<<" \n";();cout<<"字符串已被清空"<<endl;cout<<"请按任意键继续"<<endl;cin>>b;D一、阅读程序题四、编程题#include <>#include<>#define PAIclass Circle{public:Circle(){r=0;}Circle (double d){r=d;}double area(){return(PAI*r*r);}void display1(){cout<<"桌子的面积:"<<area()<<endl;}private:double r;};class Table{public:Table(){heig=0;}Table (double h) {heig=h;}void display2(){cout<<"桌子的高度:"<<heig<<endl;}private:double heig;};class Roundtable : public Circle,public Table{public:Roundtable(){strcpy(color,"白色");}Roundtable(double a,double b,char* c):Circle(a),Table(b){strcpy(color,c);}void display (){ display1();display2();cout<<"桌子的颜色:"<<color<<endl; }private:char color[20];};void main(){Roundtable s,,"黑色");();}如果Age在基类中被定义为私有的，SetAge(int n)不能直接给Age赋值，如果Age是基类的公有成员变量，则可以直接赋值。
最新答案-c++面向对象程序设计课后习题答案(谭浩强版)
第一章5:#include <iostream> using namespace std;int main(){cout<<"This"<<"is"; cout<<"a"<<"C++";cout<<"program."<<endl; return 0;}6:#include <iostream> using namespace std;int main(){int a,b,c;a=10;b=23;c=a+b;cout<<"a+b=";cout<<c;cout<<endl;return 0;}7:#include <iostream> using namespace std;int main(){int a,b,c;int f(int x,int y,int z); cin>>a>>b>>c;c=f(a,b,c);cout<<c<<endl;return 0;}int f(int x,int y,int z){int m;else m=y;if (z<m) m=z;return(m);}8: #include <iostream> using namespace std;int main(){int a,b,c;cin>>a>>b;c=a+b;cout<<"a+b="<<a+b<<endl; return 0;}9:#include <iostream>using namespace std;int main(){int add(int x,int y);int a,b,c;cin>>a>>b;c=add(a,b);cout<<"a+b="<<c<<endl; return 0;}int add(int x,int y){int c;c=x+y;return(c);}10:#include <iostream>using namespace std;int main(){void sort(int x,int y,int z); int x,y,z;cin>>x>>y>>z;return 0;}void sort(int x, int y, int z){int temp;if (x>y) {temp=x;x=y;y=temp;} //{ }内3个语句的作用是将x和y的值互换) if (z<x) cout<<z<<','<<x<<','<<y<<endl;else if (z<y) cout<<x<<','<<z<<','<<y<<endl;else cout<<x<<','<<y<<','<<z<<endl;}11:#include <iostream>using namespace std;int main(){int max(int a,int b,int c=0);int a,b,c;cin>>a>>b>>c;cout<<"max(a,b,c)="<<max(a,b,c)<<endl;cout<<"max(a,b)="<<max(a,b)<<endl;return 0;}int max(int a,int b,int c){if(b>a) a=b;if(c>a) a=c;return a;}12:#include <iostream>using namespace std;int main(){void change(int ,int );int a,b;cin>>a>>b;if(a<b) change(a,b);cout<<"max="<<a<<" min="<<b<<endl;return 0;}void change(int ,int ){int r1,r2,temp;temp=r1;r1=r2;r2=temp;}13:#include <iostream>using namespace std;int main(){void sort(int &,int &,int &);int a,b,c,a1,b1,c1;cout<<"Please enter 3 integers:";cin>>a>>b>>c;a1=a;b1=b;c1=c;sort(a1,b1,c1);cout<<a<<" "<<b<<" "<<c<<" in sorted order is "; cout<<a1<<" "<<b1<<" "<<c1<<endl;return 0;}void sort(int &i,int &j,int &k){ void change(int &,int &);if (i>j) change(i,j);if (i>k) change(i,k);if (j>k) change(j,k);}void change(int &x,int &y){ int temp;temp=x;x=y;y=temp;}14:#include <iostream>#include <string>using namespace std;int main(){ string s1="week",s2="end";cout<<"s1="<<s1<<endl;cout<<"s2="<<s2<<endl;s1=s1+s2;cout<<"The new string is:"<<s1<<endl;return 0;}15:#include <iostream>#include <string>using namespace std;int main(){ string str;int i,n;char temp;cout<<"please input a string:";cin>>str;n=str.size();for(i=0;i<n/2;i++){temp=str[i];str[i]=str[n-i-1];str[n-i-1]=temp;}cout<<str<<endl;return 0;}16:#include <iostream>#include <string>using namespace std;int main(){ int i;string str[5]={"BASIC","C","FORTRAN","C++","PASCAL"}; void sort(string []);sort(str);cout<<"the sorted strings :"<<endl;for(i=0;i<5;i++)cout<<str[i]<<" ";cout<<endl;return 0;}void sort(string s[]){int i,j;string t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (s[i]>s[i+1]){t=s[i];s[i]=s[i+1];s[i+1]=t;}}17: #include <iostream>#include <string>using namespace std;int main(){long c[5]={10100,-123567, 1198783,-165654, 3456}; int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 };void sort(int []);void sort(float []);void sort(long []);sort(a);sort(b);sort(c);return 0;}void sort(int a[]){int i,j,t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(long a[]){int i,j;long t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(float a[]){int i,j;float t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}18: #include <iostream>#include <string>using namespace std;template <typename T>void sort(T a[]){int i,j,min;T t;for(i=0;i<5;i++){min=i;for (j=i+1;j<5;j++)if(a[min]>a[j]) min=j;t=a[i]; a[i]=a[min]; a[min]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}int main(){ int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 };long c[5]={10100,-123567, 1198783,-165654, 3456}; sort(a);sort(b);sort(c);return 0;}第二章1#include <iostream>using namespace std;class Time{public:void set_time();void show_time();private: //成员改为公用的int hour;int minute;int sec;};void Time::set_time() //在main函数之前定义{cin>>hour;cin>>minute;cin>>sec;}void Time::show_time() //在main函数之前定义{cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1;t1.set_time();t1.show_time();return 0;}2：#include <iostream>using namespace std;class Time{public:void set_time(void){cin>>hour;cin>>minute;cin>>sec;void show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}private: int hour;int minute;int sec;};Time t;int main(){t.set_time();t.show_time();return 0;}3：#include <iostream>using namespace std;class Time{public:void set_time(void);void show_time(void);private:int hour;int minute;int sec;};void Time::set_time(void){cin>>hour;cin>>minute;cin>>sec;}void Time::show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}Time t;int main(){ t.set_time();t.show_time();return 0;}//xt2-4-1.cpp(main.cpp)#include <iostream>using namespace std;#include "xt2-4.h"int main(){Student stud;stud.set_value();stud.display();return 0;}//xt2-4-2.cpp(即student.cpp)#include "xt2-4.h" //在此文件中进行函数的定义#include <iostream>using namespace std; //不要漏写此行void Student::display( ){ cout<<"num:"<<num<<endl;cout<<"name:"<<name<<endl;cout<<"sex:"<<sex<<endl;}void Student::set_value(){ cin>>num;cin>>name;cin>>sex;}5：//xt2-5-1.cpp(file1.cpp)#include <iostream>#include "xt2-5.h"int main(){Array_max arrmax;arrmax.set_value();arrmax.max_value();arrmax.show_value();return 0;}//xt2-5-2.cpp(arraymax.cpp)#include <iostream>using namespace std;#include "xt2-5.h"void Array_max::set_value()for (i=0;i<10;i++)cin>>array[i];}void Array_max::max_value(){int i;max=array[0];for (i=1;i<10;i++)if(array[i]>max) max=array[i];}void Array_max::show_value(){cout<<"max="<<max<<endl;}6：解法一#include <iostream>using namespace std;class Box{public:void get_value();float volume();void display();public:float lengh;float width;float height;};void Box::get_value(){ cout<<"please input lengh, width,height:"; cin>>lengh;cin>>width;cin>>height;}float Box::volume(){ return(lengh*width*height);}void Box::display(){ cout<<volume()<<endl;}{Box box1,box2,box3;box1.get_value();cout<<"volmue of bax1 is ";box1.display();box2.get_value();cout<<"volmue of bax2 is ";box2.display();box3.get_value();cout<<"volmue of bax3 is ";box3.display();return 0;}解法二：#include <iostream>using namespace std;class Box{public:void get_value();void volume();void display();public:float lengh;float width;float height;float vol;};void Box::get_value(){ cout<<"please input lengh, width,height:"; cin>>lengh;cin>>width;cin>>height;}void Box::volume(){ vol=lengh*width*height;}void Box::display(){ cout<<vol<<endl;}int main(){Box box1,box2,box3;box1.get_value();box1.volume();cout<<"volmue of bax1 is ";box1.display();box2.get_value();box2.volume();cout<<"volmue of bax2 is ";box2.display();box3.get_value();box3.volume();cout<<"volmue of bax3 is ";box3.display();return 0;}第三章2:#include <iostream>using namespace std;class Date{public:Date(int,int,int);Date(int,int);Date(int);Date();void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }Date::Date(int m,int d):month(m),day(d){year=2005;}Date::Date(int m):month(m){day=1;year=2005;}{month=1;day=1;year=2005;}void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d3(10);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}3:#include <iostream>using namespace std;class Date{public:Date(int=1,int=1,int=2005);void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}4:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void display();private:int num;float score;};void Student::display(){cout<<num<<" "<<score<<endl;}int main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};Student *p=stud;for(int i=0;i<=2;p=p+2,i++)p->display();return 0;}5:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}int num;float score;};void main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};void max(Student* );Student *p=&stud[0];max(p);}void max(Student *arr){float max_score=arr[0].score;int k=0;for(int i=1;i<5;i++)if(arr[i].score>max_score) {max_score=arr[i].score;k=i;} cout<<arr[k].num<<" "<<max_score<<endl;}6:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display(){cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}7: 解法一#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;}//可改为:void display() const {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){const Studentstud(101,78.5);stud.display();//stud.change(101,80.5);stud.display();return 0;}解法二：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) const {num=n;score=s;}void display() const {cout<<num<<" "<<score<<endl;}private:mutable int num;mutable float score;};int main(){const Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}解法三：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);Student *p=&stud;p->display();p->change(101,80.5);p->display();return 0;}8：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);void fun(Student&);fun(stud);return 0;}void fun(Student &stu){stu.display();stu.change(101,80.5);stu.display();}9：#include <iostream>using namespace std;class Product{public:Product(int n,int q,float p):num(n),quantity(q),price(p){};void total();static float average();static void display();private:int num;int quantity;float price;static float discount;static float sum;static int n;};void Product::total(){float rate=1.0;if(quantity>10) rate=0.98*rate;sum=sum+quantity*price*rate*(1-discount);n=n+quantity;}void Product::display(){cout<<sum<<endl;cout<<average()<<endl;}float Product::average(){return(sum/n);}float Product::discount=0.05;float Product::sum=0;int Product::n=0;int main(){Product Prod[3]={Product(101,5,23.5),Product(102,12,24.56),Product(103,100,21.5) };for(int i=0;i<3;i++)Prod[i].total();Product::display();return 0;}10：#include <iostream>using namespace std;class Date;class Time{public:Time(int,int,int);friend void display(const Date &,const Time &); private:int hour;int minute;int sec;};Time::Time(int h,int m,int s){hour=h;minute=m;sec=s;}class Date{public:Date(int,int,int);friend void display(const Date &,const Time &); private:int month;int day;int year;};Date::Date(int m,int d,int y){month=m;day=d;year=y;}void display(const Date &d,const Time &t){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl; cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);display(d1,t1);return 0;}11：#include <iostream>using namespace std;class Time;class Date{public:Date(int,int,int);friend Time;private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y){ }class Time{public:Time(int,int,int);void display(const Date &);private:int hour;int minute;int sec;};Time::Time(int h,int m,int s):hour(h),minute(m),sec(s){ }void Time::display(const Date &d){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl;cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);t1.display(d1);return 0;}12：#include <iostream>using namespace std;template<class numtype>class Compare{public:Compare(numtype a,numtype b);numtype max();numtype min();private:numtype x,y;};template <class numtype>Compare<numtype>::Compare(numtype a,numtype b){x=a;y=b;}template <class numtype>numtype Compare<numtype>::max(){return (x>y)?x:y;}template <class numtype>numtype Compare<numtype>::min(){return (x<y)?x:y;}int main(){Compare<int> cmp1(3,7);cout<<cmp1.max()<<" is the Maximum of two integer numbers."<<endl;cout<<cmp1.min()<<" is the Minimum of two integer numbers."<<endl<<endl; Compare<float> cmp2(45.78,93.6);cout<<cmp2.max()<<" is the Maximum of two float numbers."<<endl;cout<<cmp2.min()<<" is the Minimum of two float numbers."<<endl<<endl; Compare<char> cmp3('a','A');cout<<cmp3.max()<<" is the Maximum of two characters."<<endl;cout<<cmp3.min()<<" is the Minimum of two characters."<<endl;return 0;}第四章1:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}double get_real();double get_imag();void display();private:double real;double imag;};double Complex::get_real(){return real;}double Complex::get_imag(){return imag;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator + (Complex &c1,Complex &c2){return Complex(c1.get_real()+c2.get_real(),c1.get_imag()+c2.get_imag()); }int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c3=";c3.display();return 0;}2:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator-(Complex &c2);Complex operator*(Complex &c2);Complex operator/(Complex &c2);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c2){Complex c;c.real=real+c2.real;c.imag=imag+c2.imag;return c;}Complex Complex::operator-(Complex &c2){Complex c;c.real=real-c2.real;c.imag=imag-c2.imag;return c;}Complex Complex::operator*(Complex &c2){Complex c;c.real=real*c2.real-imag*c2.imag;c.imag=imag*c2.real+real*c2.imag;return c;}Complex Complex::operator/(Complex &c2){Complex c;c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag); return c;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}int main(){Complex c1(3,4),c2(5,-10),c3;cout<<"c1+c2=";c3.display();c3=c1-c2;cout<<"c1-c2=";c3.display();c3=c1*c2;cout<<"c1*c2=";c3.display();c3=c1/c2;cout<<"c1/c2=";c3.display();return 0;}3:#include <iostream> //用VC++时改为∶#include <iostream.h> using namespace std; //用VC++时为取消此行class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator+(int &i);friend Complex operator+(int&,Complex &);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c){return Complex(real+c.real,imag+c.imag);}Complex Complex::operator+(int &i){return Complex(real+i,imag);}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator+(int &i,Complex &c){return Complex(i+c.real,c.imag);}int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c1+c2=";c3.display();c3=i+c1;cout<<"i+c1=";c3.display();c3=c1+i;cout<<"c1+i=";c3.display();return 0;}4:#include <iostream>using namespace std;class Matrix //定义Matrix类{public:Matrix(); //默认构造函数friend Matrix operator+(Matrix &,Matrix &); //重载运算符“+”void input(); //输入数据函数void display(); //输出数据函数private:int mat[2][3];};Matrix::Matrix() //定义构造函数{for(int i=0;i<2;i++)for(int j=0;j<3;j++)mat[i][j]=0;}Matrix operator+(Matrix &a,Matrix &b) //定义重载运算符“+”函数{Matrix c;for(int i=0;i<2;i++)for(int j=0;j<3;j++){c.mat[i][j]=a.mat[i][j]+b.mat[i][j];}return c;}void Matrix::input() //定义输入数据函数{cout<<"input value of matrix:"<<endl;for(int i=0;i<2;i++)for(int j=0;j<3;j++)cin>>mat[i][j];}void Matrix::display() //定义输出数据函数{for (int i=0;i<2;i++){for(int j=0;j<3;j++){cout<<mat[i][j]<<" ";}cout<<endl;}}int main(){Matrix a,b,c;a.input();b.input();cout<<endl<<"Matrix a:"<<endl;a.display();cout<<endl<<"Matrix b:"<<endl;b.display();c=a+b; //用重载运算符“+”实现两个矩阵相加cout<<endl<<"Matrix c = Matrix a + Matrix b :"<<endl;c.display();return 0;}5:#include <iostream.h>//using namespace std;class Matrix{public:Matrix();friend Matrix operator+(Matrix &,Matrix &);friend ostream& operator<<(ostream&,Matrix&);friend istream& operator>>(istream&,Matrix&);private:int mat[2][3];};Matrix::Matrix(){for(int i=0;i<2;i++)for(int j=0;j<3;j++)mat[i][j]=0;}Matrix operator+(Matrix &a,Matrix &b){Matrix c;for(int i=0;i<2;i++)for(int j=0;j<3;j++){c.mat[i][j]=a.mat[i][j]+b.mat[i][j];}return c;}istream& operator>>(istream &in,Matrix &m){cout<<"input value of matrix:"<<endl;for(int i=0;i<2;i++)for(int j=0;j<3;j++)in>>m.mat[i][j];return in;}ostream& operator<<(ostream &out,Matrix &m){for (int i=0;i<2;i++){for(int j=0;j<3;j++){out<<m.mat[i][j]<<" ";}out<<endl;}return out;}int main(){ Matrix a,b,c;cin>>a;cin>>b;cout<<endl<<"Matrix a:"<<endl<<a<<endl;cout<<endl<<"Matrix b:"<<endl<<b<<endl;c=a+b;cout<<endl<<"Matrix c = Matrix a + Matrix b :"<<endl<<c<<endl; return 0;}6:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r){real=r;imag=0;}Complex(double r,double i){real=r;imag=i;}operator double(){return real;}void display();private:double real;double imag;};void Complex::display(){cout<<"("<<real<<", "<<imag<<")"<<endl;}int main(){Complex c1(3,4),c2;double d1;d1=2.5+c1;cout<<"d1="<<d1<<endl;c2=Complex(d1);cout<<"c2=";c2.display();return 0;}7:#include <iostream>using namespace std;class Student{public:Student(int,char[],char,float);int get_num(){return num;}char * get_name(){return name;}char get_sex(){return sex;}void display(){cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\nscore:"<<score<<"\n\n";} private:int num;char name[20];char sex;float score;};Student::Student(int n,char nam[],char s,float so){num=n;strcpy(name,nam);sex=s;score=so;}class Teacher{public:Teacher(){}Teacher(Student&);Teacher(int n,char nam[],char sex,float pay);void display();private:int num;char name[20];char sex;float pay;};Teacher::Teacher(int n,char nam[],char s,float p){num=n;strcpy(name,nam);sex=s;pay=p;}Teacher::Teacher(Student& stud){num=stud.get_num();strcpy(name,stud.get_name());sex=stud.get_sex();pay=1500;}void Teacher::display(){cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\npay:"<<pay<<"\n\n";}int main(){Teacher teacher1(10001,"Li",'f',1234.5),teacher2;Student student1(20010,"Wang",'m',89.5);cout<<"student1:"<<endl;student1.display();teacher2=Teacher(student1);cout<<"teacher2:"<<endl;teacher2.display();return 0;}第五章1:#include <iostream>using namespace std;class Student。
面向对象程序设计java程序设计课后习题答案
第一章1．public class BegintoLearn{public static void main(String args[]) {System.out.println("I’d like to study Java ! ");}}2．public class TraStar{public static void main(String args[]) {System.out.println("*");System.out.println("* *");System.out.println("* * *");System.out.println("* * * *");System.out.println("* * * * *");}}第二章1．public class ProNum{public static void main(String args[]) {float p;long q;int m=10,n=5;System.out.println("m="+m+" n="+n);m=m+3;n=n+5;System.out.println("m="+m+" n="+n);p=(float)(m+n)/2;System.out.println("p="+p);q=(m*m*n*n);System.out.println("q="+q);}}2．class SphereClass {public static void main(String args[]) {int r=3;double v;v=3.14*r*r*r*4/3;System.out.println("V="+v)}}第三章1. import java.io.*;public class InNum{public static void main(String args[]) throws IOException{ int num1,num2;String str;BufferedReader buf;buf=new BufferedReader(new InputStreamReader(System.in));System.out.print("Input first integer:");str=buf.readLine();num1=Integer.parseInt(str);System.out.print("Input second integer:");str=buf.readLine();num2=Integer.parseInt(str);System.out.println("The sum is "+(num1+num2));}}2．import java.io.*;public class Grade{public static void main(String args[]) throws IOException{ int score;char ch;String str;BufferedReader buf;buf=new BufferedReader(new InputStreamReader(System.in));System.out.print("Input the score(0-100):");str=buf.readLine();score=Integer.parseInt(str);if (score>=90)ch='A';else if (score>=75)ch='B';else if (score>=60)ch='C';elsech='D';System.out.print("The Grade is "+ch);}}3．public class ShuLie{public static void main(String args[]){int a ,q ,n;q=(150-135)/5;a=(135-20*q)/5;for (n=0;n<10;n++)System.out.print((a+n*q)+" ");}}4．public class Pyramid{public static void main(String args[]){int i,j,k;for(i=0;i<=4;i++){for ( j=0;j<20-i;j++)System.out.print(" ");for (k=0;k<=2*i;k++)if (k<=i)System.out.print(" "+(2*k+1));elseSystem.out.print(" "+(2*(2*i-k)+1));System.out.println();}}}5．import java.io.*;public class PrimeNumber{public static void main(String args[]) throws IOException{ int n=0;int m;String str;boolean mark=false;BufferedReader buf;buf=new BufferedReader(new InputStreamReader(System.in));System.out.print("Input the m:");str=buf.readLine();m=Integer.parseInt(str);for(int i=3;i<=m;i+=2){for(int j=2;j<i;j++){if(i%j==0){mark=true;break;}}if (!mark){System.out.print(" "+i);n++; //outputanewlineif(n%10==0) //after10numbersSystem.out.println();}mark=false;}System.out.println();}}6．import java.io.*;public class Factor12{public static void main(String args[]) throws IOException{ int m;String str;BufferedReader buf;buf=new BufferedReader(new InputStreamReader(System.in));System.out.print("Input the m:");str=buf.readLine();m=Integer.parseInt(str);System.out.print(m+"\'s factors are: ");System.out.println( );for(int i=1;i<=m;i++)if (m%i==0)System.out.print(" "+i);}}7．public class MSteel{public static void main(String args[]){int d=0;float m=2000;while (m>=5) {m=m/2;d++;System.out.print(d+": ");System.out.println(m);}System.out.print("You need "+d+" days");}}8．public class AlmostPi{public static void main(String args[]){int n;long m;double s,t;n=1;m=0;s=0;do{t=(double)n/(2*m+1);m++;n=-n;s=s+t;} while (4*s-3.14159> 0.0000001 || 4*s-3.14159< -0.0000001);System.out.println(m);}}9.public class LSRnd{public static void main(String args[]){int mun,n,max1,min1;max1=0;min1=100;for (n=1;n<=10;n++){mun=(int)(100*Math.random());System.out.print(mun+" ");if (mun>max1)max1=mun;if (mun<min1)min1=mun;}System.out.println();System.out.println("The largest number is: "+max1);System.out.println("The smallest number is: "+min1);}}10.import java.io.*;public class StrArry{public static void main(String args[]) throws IOException{int m;String str;Stringmonth[]={"January","February","March","April","May","June","July","August","september","October","November","December"};BufferedReader buf;buf=new BufferedReader(new InputStreamReader(System.in));System.out.print("Input the m:");str=buf.readLine();m=Integer.parseInt(str);if (m>=1 && m<=12)System.out.println(month[m-1]);elseSystem.out.print("Your Input is wrong");}}第四章1．import java.util.*;public class Person{private String name;private char sex;private int year,month;public Person( ){}public Person(String nm,char sx,int y,int m) {name=nm;sex=sx;year=y;month=m;}public void printPerson( ) {Calendar now=Calendar.getInstance();int age=now.get(Calendar.YEAR)-year;System.out.println("Name: "+name+",Sex: "+sex+", Age: "+age);}public static void main(String args[]){Person pe1=new Person("Tom",'m',1980,10);pe1.printPerson();}}2．public class Rectangle{double width,length,girth,area;public Rectangle(){};public Rectangle(double wd,double le) {width=wd;length=le;}public void setWidth(double wd) {width=wd;}public void setLength(double le) {length=le;}public double getWidth( ) {return width;}public double getLength( ) {return length;}public double girth(){return 2*(width+length);}public double area(){return width*length;}public void printRectangle(){System.out.println("Width="+width+" ,Length="+length);}public static void main(String args[]){Rectangle re1=new Rectangle(10,20);Rectangle re2=new Rectangle();re2.setWidth(3);re2.setLength(4);re1.printRectangle();System.out.println("Girth="+re1.girth()+",Area="+re1.area());re2.printRectangle();System.out.println("Girth="+re2.girth()+",Area="+re2.area());}}3．public class Matrix{ private int mx[][],m,n; public Matrix(int r,int c) { m=r;n=c;mx=new int[m][n];iniMatrix();}public Matrix(){m=3;n=3;mx=new int[3][3];iniMatrix();}public void iniMatrix(){ int i,j;for(i=0;i<=m-1;i++)for(j=0;j<=n-1;j++)mx[i][j]=(int)(Math.random()*100); }public void tranMatrix(){int i,j,t;int mt[][]=new int[m][n];for(i=0;i<=m-1;i++)for(j=0;j<=n-1;j++)mt[i][j]=mx[i][j];t=m;m=n;n=t;mx=new int[m][n];for(i=0;i<=m-1;i++)for(j=0;j<=n-1;j++)mx[i][j]=mt[j][i];}public void printMatrix(){int i,j;for(i=0;i<=m-1;i++){for(j=0;j<=n-1;j++)System.out.print(" "+mx[i][j]);System.out.println();}}public void addMatrix(Matrix b) {int i,j;for(i=0;i<=m-1;i++)for(j=0;j<=n-1;j++)mx[i][j]=mx[i][j]+b.mx[i][j];} public static void main(String args[]){Matrix ma=new Matrix(4,3);Matrix mb=new Matrix(4,3);System.out.println("The matrix_A:"); ma.printMatrix();System.out.println("The matrix_B:"); mb.printMatrix();System.out.println("Matrix_A +Matrix_B:");ma.addMatrix(mb);ma.printMatrix();System.out.println("Transpose Matrix_B:");mb.tranMatrix();mb.printMatrix();}}4．public class Substring{public static void main(String args[]){String str1=new String("addActionListener");String str2=new String("Action");int n;n=str1.indexOf(str2);if(n>=0){System.out.println("String_2 is in String_1");System.out.println("The substring before String_2 is "+str1.substring(0,n));System.out.println("The substring behind String_2 is "+str1.substring(n+str2.length( )));}}} 五、写出程序运行后的结果1． 2.。
(完整版)C++面向对象程序设计(谭浩强)课后习题答案text-P67
班级：B11512 姓名：陈德桥学号：30 1.以下是根据题意订正后的程序和运行结果：#include<iostream>using namespace std;class Time{public:void set_time(void);void show_time(void);int hour;int minute;int sec;};Time t;int main(){t.set_time();t.show_time();return 0;}void Time::set_time(void){cout<<"set_time:"<<endl;cin>>t.hour;cin>>t.minute;cin>>t.sec;}void Time::show_time(void){cout<<"show_time:"<<endl;cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl;}2.以下是根据题目要求对例2.1进行改写后的程序和运行结果：#include<iostream>using namespace std;class Timeprivate:int hour;int minute;int second;public:void settime(int h,int m,int s){tl.hour=h,tl.minute=m,tl.second=s;}void showtime(){cout<<"showtime:"<<endl;cout<<tl.hour<<":"<<tl.minute<<":"<<tl.second<<endl;}}tl;int main(){tl.settime(22,24,0);tl.showtime();return 0;}3. .以下是根据题目要求对例2.1进行改写后的程序和运行结果：#include<iostream>using namespace std;class Time{private:int hour;int minute;int second;public:void settime(int h,int m,int s);void showtime();}tl;int main(){tl.settime(22,24,0);tl.showtime();return 0;void Time::settime(int h,int m,int s){tl.hour=h,tl.minute=m,tl.second=s;}void Time::showtime(){cout<<"showtime:"<<endl;cout<<tl.hour<<":"<<tl.minute<<":"<<tl.second<<endl;}4.以下根据要求对本章2、3、3进行完善后的程序和运行结果：#include<iostream>#include<string>using namespace std;class Student{public:void display(){cout<<"num:"<<num<<endl;cout<<"name:"<<name<<endl;cout<<"sex:"<<sex<<endl;}void set_value1(int n);void set_value2(string m);void set_value3(char s);private:int num;string name;char sex;}Stu;int main(){Stu.set_value1(12);Stu.set_value2("liu");Stu.set_value3('F');Stu.display();return 0;}void Student::set_value1(int n)Stu.num=n;}void Student::set_value2(string m) {=m;}void Student::set_value3(char s) {Stu.sex=s;}。
c++面向对象程序设计课后习题答案
c++面向对象程序设计课后习题答案(谭浩强版)(总14页)页内文档均可自由编辑，此页仅为封面第一章5:#include <iostream> using namespace std;int main(){cout<<"This"<<"is";cout<<"a"<<"C++";cout<<"program."<<endl; return 0;}6:#include <iostream> using namespace std;int main(){int a,b,c;a=10;b=23;c=a+b;cout<<"a+b=";cout<<c;cout<<endl;return 0;}7:#include <iostream> using namespace std;int main(){int a,b,c;int f(int x,int y,int z);cin>>a>>b>>c;c=f(a,b,c);cout<<c<<endl;return 0;}int f(int x,int y,int z){int m;if (x<y) m=x;else m=y;if (z<m) m=z;return(m);}8: #include <iostream> using namespace std;int main(){int a,b,c;cin>>a>>b;c=a+b;cout<<"a+b="<<a+b<<endl; return 0;}9:#include <iostream>using namespace std;int main(){int add(int x,int y);int a,b,c;cin>>a>>b;c=add(a,b);cout<<"a+b="<<c<<endl; return 0;}int add(int x,int y){int c;c=x+y;return(c);}10:#include <iostream>using namespace std;int main(){void sort(int x,int y,int z); int x,y,z;cin>>x>>y>>z;sort(x,y,z);return 0;}void sort(int x, int y, int z){int temp;if (x>y) {temp=x;x=y;y=temp;} 2-4-12-4-22-5-12-5-2Box box1Box box1core; int k=0;for(int i=1;i<5;i++)if(arr[i].score>max_score) {max_score=arr[i].score;k=i;}cout<<arr[k].num<<" "<<max_score<<endl;}6:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display(){cout<<num<<" "<<score<<endl;}private:int num;float score;};int main(){Student stud(101,;();(101,;();return 0;}7: 解法一#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;}otal();Product::display();return 0;}10：#include <iostream>using namespace std;class Date;class Time{public:Time(int,int,int);friend void display(const Date &,const Time &); private:int hour;int minute;int sec;};Time::Time(int h,int m,int s){hour=h;minute=m;sec=s;}class Date{public:Date(int,int,int);friend void display(const Date &,const Time &); private:int month;int day;int year;};Date::Date(int m,int d,int y){month=m;day=d;year=y;}void display(const Date &d,const Time &t){cout<<<<"/"<<<<"/"<<<<endl;cout<<<<":"<<<<":"<<<<endl;int main(){Time t1(10,13,56);Date d1(12,25,2004);display(d1,t1);return 0;}11：#include <iostream>using namespace std;class Time;class Date{public:Date(int,int,int);friend Time;private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y){ } class Time{public:Time(int,int,int);void display(const Date &);private:int hour;int minute;int sec;};Time::Time(int h,int m,int s):hour(h),minute(m),sec(s){ } void Time::display(const Date &d){cout<<<<"/"<<<<"/"<<<<endl;cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);(d1);return 0;}12：#include <iostream>using namespace std;template<class numtype>class Compare{public:Compare(numtype a,numtype b);numtype max();numtype min();private:numtype x,y;};template <class numtype>Compare<numtype>::Compare(numtype a,numtype b){x=a;y=b;}template <class numtype>numtype Compare<numtype>::max(){return (x>y)x:y;}template <class numtype>numtype Compare<numtype>::min(){return (x<y)x:y;}int main(){Compare<int> cmp1(3,7);cout<<()<<" is the Maximum of two integer numbers."<<endl;cout<<()<<" is the Minimum of two integer numbers."<<endl<<endl; Compare<float> cmp2,;cout<<()<<" is the Maximum of two float numbers."<<endl;cout<<()<<" is the Minimum of two float numbers."<<endl<<endl; Compare<char> cmp3('a','A');cout<<()<<" is the Maximum of two characters."<<endl;cout<<()<<" is the Minimum of two characters."<<endl;return 0;}第四章1:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}double get_real();double get_imag();void display();private:double real;double imag;};double Complex::get_real(){return real;}double Complex::get_imag(){return imag;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;} Complex operator + (Complex &c1,Complex &c2) {return Complex()+(),()+());}int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c3=";();return 0;}2:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;} Complex operator+(Complex &c2);Complex operator-(Complex &c2);Complex operator*(Complex &c2);Complex operator/(Complex &c2);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c2) {Complex c;=real+;=imag+;return c;}Complex Complex::operator-(Complex &c2) {Complex c;=;=;return c;}Complex Complex::operator*(Complex &c2) {Complex c;=real**;=imag*+real*;return c;}Complex Complex::operator/(Complex &c2) {Complex c;=(real*+imag*/*+*;=(imag**/*+*;return c;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;} int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c1+c2=";();c3=c1-c2;cout<<"c1-c2=";();c3=c1*c2;cout<<"c1*c2=";();c3=c1/c2;cout<<"c1/c2=";();return 0;}3:#include <iostream> ,"president","135 Beijing Road,Shanghai","(021)",;( );return 0;}10：#include <iostream>#include <cstring>using namespace std;class Teacher um<<" "<<staf[i].name<<" "<<staf[i].age<<""<<staf[i].pay<<endl;((char *)&staf[i],sizeof(staf[i]));}cout<<"please input data you want insert:"<<endl;for(i=0;i<2;i++){cin>>>>>>>>;(0,ios::end);((char *)&staf1,sizeof(staf1));}(0,ios::beg);for(i=0;i<7;i++){((char *)&staf[i],sizeof(staf[i]));cout<<staf[i].num<<" "<<staf[i].name<<" "<<staf[i].age<<" "<<staf[i].pay<<endl; }bool find;cout<<"enter number you want search,enter 0 to stop.";cin>>num;while(num){find=false;(0,ios::beg);for(i=0;i<7;i++){((char *)&staf[i],sizeof(staf[i]));if(num==staf[i].num){m=();cout<<num<<" is No."<<m/sizeof(staf1)<<endl;cout<<staf[i].num<<" "<<staf[i].name<<" "<<staf[i].age<<" "<<staf[i].pay<<endl; find=true;break;}}if(!find)cout<<"can't find "<<num<<endl;cout<<"enter number you want search,enter 0 to stop.";cin>>num;}();return 0;}6：解法一#include <iostream>#include <strstream>using namespace std;struct student{int num;char name[20];double score;};int main(){student stud[3]={1001,"Li",78,1002,"Wang",,1004,"Fun",90},stud1[3];char c[50];int i;ostrstream strout(c,50);for(i=0;i<3;i++)strout<<stud[i].num<<" "<<stud[i].name<<" "<<stud[i].score<<" ";strout<<ends;cout<<"array c:"<<endl<<c<<endl<<endl;istrstream strin(c,50);for(i=0;i<3;i++)strin>>stud1[i].num>>stud1[i].name>>stud1[i].score;cout<<"data from array c to array stud1:"<<endl;for(i=0;i<3;i++)cout<<stud1[i].num<<" "<<stud1[i].name<<" "<<stud1[i].score<<endl;cout<<endl;return 0;}6：解法二#include <iostream>#include <strstream>using namespace std;struct student{int num;char name[20];double score;};int main(){int i;student stud[3]={1001,"Li",78,1002,"Wang",,1004,"Fun",90},stud1[3]; char c[50];strstream strio(c,50,ios::in|ios::out);for(i=0;i<3;i++)strio<<stud[i].num<<" "<<stud[i].name<<" "<<stud[i].score<<" ";strio<<ends;cout<<"array c:"<<endl<<c<<endl<<endl;for(i=0;i<3;i++)strio>>stud1[i].num>>stud1[i].name>>stud1[i].score;cout<<"data from array c to array stud1:"<<endl;for(i=0;i<3;i++)cout<<stud1[i].num<<" "<<stud1[i].name<<" "<<stud1[i].score<<endl; cout<<endl;return 0;}第八章1:#include <iostream>#include <cmath>using namespace std;double q(double,double,double);void main(){double a,b,c,p,x1,x2;cout<<"please enter a,b,c:";cin>>a>>b>>c;p=-b/(2*a);try{x1=p+q(a,b,c);x2=p-q(a,b,c);cout<<"x1="<<x1<<endl<<"x2="<<x2<<endl;}catch(double d){cout<<"a="<<a<<",b="<<b<<",c="<<c<<",disc="<<d<<",error!"<<endl;} cout<<"end"<<endl;}double q(double a,double b,double c){double disc;disc=b*b-4*a*c;if (disc<0) throw disc;return sqrt(disc)/(2*a);}2:#include <iostream>#include <string>using namespace std;class Student{public:Student(int n,string nam){cout<<"constructor-"<<n<<endl;num=n;name=nam;}~Student(){cout<<"destructor-"<<num<<endl;}void get_data();private:int num;string name;};void Student::get_data(){if(num==0) throw num;else cout<<num<<" "<<name<<endl;cout<<"in get_data()"<<endl;}void fun(){Student stud1(1101,"tan");();try{Student stud2(0,"Li");();}catch(int n){cout<<"num="<<n<<",error!"<<endl;}}int main(){cout<<"main begin"<<endl;cout<<"call fun()"<<endl;fun();cout<<"main end"<<endl;return 0;}3://main file#include <iostream>using namespace std;#include ""#include ""using namespace std;using namespace student1;int main(){Student stud1(1001,"Wang",18,"123 Beijing Road,Shanghua"); ();student2::Student stud2(1102,"Li",'f',;();return 0;}//，文件名为#include <string>namespace student1{class Student{public:Student(int n,string nam,int a,string addr){num=n;name=nam;age=a;address=addr;}void show_data();private:int num;string name;int age;string address;};void Student::show_data(){cout<<"num:"<<num<<" name:"<<name<<" age:"<<age<<" address:"<<address<<endl;}}//，文件名为#include <string>namespace student2{class Student{public:Student(int n,string nam,char s,float sco){num=n;name=nam;sex=s;score=sco;}void show_data();private:int num;string name;char sex;float score;};void Student::show_data(){cout<<"num:"<<num<<" name:"<<name<<" sex:"<<sex <<" score:"<<score<<endl; }}。
面向对象程序设计(李爱华、程磊)课后习题答案
第二章2-4#include <iostream>using namespace std;Add(int a,int b);int main(){int x,y,sum;cout<<"please input x and y:";cin>>x>>y;sum = add(x,y);cout <<x<<"+"<<y<<"="<<sum<<endl;}Add(int a,int b){return a+b;}2-5(1)this is a C++ program.(2)x=50.6 y=10 z=Ax=216.34 y=10 z=Ax=216.34 y=2 z=Ax=216.34 y=2 z=E(3)x y z500 10000500 15001500500 200 15002-6#include <iostream>using namespace std;int main(){int *p,*init;int countp=0;int countn=0;p = new int[20];init = p;for(int i=0;i<20;i++){cin>>*p;p++;}p = p-20;for( i=0;i<20;i++){if(*p>0) countp++;if(*p<0) countn++;cout<<*p<<" ";p++;}cout<<"正数有 :"<<countp<<endl; cout<<"负数有 :"<<countn<<endl;p = init;delete[] p;return 0;}2-7 不做要求#include <iostream>//#include <string>using namespace std;void checkagescore(string name,int age) {if (name == "exit") throw name;if(age<0||age>50)throw age;}int main(){string name;int age;for(int i=0 ;i<5 ;i++ ){cin.ignore ();getline(cin,name );cin>>age ;try{checkagescore(name,age);}catch( string){cout<<"exception :name is exit"<<endl;continue;}catch(int){cout<<"exception :age is not proper"<<endl;continue;}cout<<"name:"<<name<<"age :"<<age<<endl;}return 0;}第三章3-1（1）A （2）C （3）B （4）C （5）C（6）B（7）B（8）C（9）C3-7（1）main()函数中p1.age = 30;语句是错误的。
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1 / 39 面向对象程序设计教程（C++语言描述）题解及课程设计指导 第1章 面向对象程序设计概论
一、 名词解释 抽象封装消息 【问题解答】 面向对象方法中的抽象是指对具体问题（对象）进行概括，抽出一类对象的公共性质并加以描述的过程。 面向对象方法中的封装就是把抽象出来的对象的属性和行为结合成一个独立的单位，并尽可能隐蔽对象的内部细节。 消息是面向对象程序设计用来描述对象之间通信的机制。一个消息就是一个对象要求另一个对象实施某种操作的一个请求。 二、 填空题 （1） 目前有面向过程的结构化程序设计方法和面向对象的程序设计方法两种重要的程序设计方法。 （2） 结构化程序设计方法中的模块由顺序、选择和循环3种基本结构组成。 （3） 在结构化程序设计方法中，程序可表示为程序=数据结构+算法； 而面向对象的程序设计方法，程序可表示为程序=对象+消息。 （4） 结构化程序设计方法中的基本模块是过程； 而面向对象程序设计方法中的基本模块是类。 2 / 39
（5） 面向对象程序设计方法具有抽象性、封装性、继承性和多态性等特点。 三、 选择题（至少选一个，可以多选） （1） 面向对象程序设计着重于（ B ）的设计。 A. 对象B. 类C. 算法D. 数据 （2） 面向对象程序设计中，把对象的属性和行为组织在同一个模块内的机制叫做（ C ）。 A. 抽象 B. 继承 C. 封装 D. 多态 （3） 在面向对象程序设计中，类通过（ D ）及外界发生关系。 A. 对象 B. 类 C. 消息 D. 接口 （4） 面向对象程序设计中，对象及对象之间的通信机制是（ C ）。 A. 对象 B. 类 C. 消息 D. 接口 （5） 关于C++及C语言的关系的描述中，（ D ）是错误的。 A. C语言是C++的一个子集 B. C语言及C++是兼容的 C. C++对C语言进行了一些改进 D. C++和C语言都是面向对象的
【结果分析】 C语言是面向过程的。C++语言是一种经过改进的更为优化的C语言，是一种混合型语言，既面向过程也面向对象。 （6） 面向对象的程序设计将数据结构及（ A ）放在一起，作为一个相互依存、不可分割的整体来处理。 A. 算法 B. 信息 C. 数据隐藏 D. 数据抽象 3 / 39
（7） 下面（ A ）不是面向对象系统所包含的要素。 A. 重载 B. 对象 C. 类 D. 继承 【结果分析】 面向对象=对象+类+继承+消息+多态 （8） 下面说法正确的是（ BC ）。 A. 将数据结构和算法置于同一个函数内，即为数据封装 B. 一个类通过继承可以获得另一个类的特性 C. 面向对象要求程序员集中于事物的本质特征，用抽象的观点看待程序 D. 同一消息为不同的对象接受时，产生的行为是一样的，这称为一致性 【结果分析】 面向对象程序设计方法具有抽象性、封装性、继承性和多态性等特点。将数据结构和算法置于同一个类内，即为数据封装。同一消息为不同的对象接受时，产生的行为可能是不一样的，这称为多态性。 （9） 下面说法正确的是（ AD ）。 A. 对象是计算机内存中的一块区域，它可以存放代码和数据 B. 对象实际是功能相对独立的一段程序 C. 各个对象间的数据可以共享是对象的一大优点 D. 在面向对象的程序中，对象之间只能通过消息相互通信 【结果分析】 4 / 39
对象是计算机内存中的一块区域。在对象中，不但存有数据，而且存有代码，使得每个对象在功能上相互之间保持相对独立。对象之间存在各种联系，但它们之间只能通过消息进行通信。 四、 判断题 （1） 在高级程序设计语言中，一般用类来实现对象，类是具有相同属性和行为的一组对象的集合，它是创建对象的模板。（ √ ） （2） C++语言只支持面向对象技术的抽象性、封装性、继承性等特性，而不支持多态性。（ × ） 【结果分析】 C++语言不仅支持面向对象技术的抽象性、封装性、继承性等特性，而且支持多态性。 （3） 面向对象程序设计中的消息应该包含“如何做”的信息。（ × ） 【结果分析】 消息是面向对象程序设计用来描述对象之间通信的机制。向对象“发送消息”只需告诉对象做什么，对象根据这个消息决定如何做。 （4） 一个消息只能产生特定的响应效果。（ × ） 【结果分析】 当一个对象发出消息时，由于接收对象的类型可能不同，所以，它们可能做出不同的反应。这样，一个消息可以产生不同的响应效果，这种现象叫做多态。 （5） 类的设计和类的继承机制实现了软件模块的可重用性。（ √ ） 5 / 39
（6） C++语言和Java语言均不是一个纯正的面向对象的程序设计的语言。（ × ） 【结果分析】 Java语言是一个纯正的面向对象的程序设计语言。 （7） 学习C++语言是学习面向对象的程序设计方法的唯一途径。（ × ） 【结果分析】 程序设计方法是独立于具体程序设计语言的一种技术，学习C++语言是学习面向对象程序设计方法的重要途径之一。 （8） 在C++语言中，类是支持数据封装的工具。（ √ ） 五、 简答题 （1） 什么是结构化程序设计方法？它有哪些优点和缺点？ 【问题解答】 结构化程序设计方法着眼于系统要实现的功能，从系统的输入输出出发，分析系统要做哪些事情，进而考虑如何做这些事情，自顶向下地对系统的功能进行分解，来建立系统的功能结构和相应的程序模块结构，有效地将一个较复杂的程序系统设计任务分解成许多易于控制和处理的子任务，便于开发和维护。 随着程序规模及复杂性的增长，这种面向过程的结构化程序设计方法存在明显的不足之处。首先是数据安全性问题。由于数据被每个模块所共用，因此是不安全的，一旦出错，很难查明原因。其次是可维护性及可重用性差。它把数据结构和算法分离为相互独立的实体，一旦6 / 39
数据结构需要改变时，常常要涉及整个程序，修改工作量极大并容易产生新的错误。每一种相对于老问题的新方法都要带来额外的开销。另外，图形用户界面的应用程序，很难用过程来描述和实现，开发和维护也都很困难。 （2） 什么是面向对象程序设计方法？它有哪些优点？ 【问题解答】 面向对象的程序设计方法中，将程序设计为一组相互协作的对象而不是一组相互协作的函数。在程序中，属性用数据表示，用来描述对象静态特征； 行为用程序代码实现，用来描述对象动态特征。可见，在面向对象的程序设计方法中，对象是数据结构和算法的封装体。对象之间存在各种联系，它们之间通过消息进行通信。程序可表示为：
程序=对象+消息 在面向对象程序设计中应着重于类的设计。类正是面向对象语言的基本程序模块，通过类的设计来完成实体的建模任务。类通过一个简单的外部接口及外界发生关系。一个类中的操作不会处理到另一个类中的数据，这样程序模块的独立性、数据的安全性就有了良好的保障。程序的执行取决于事件发生的顺序，由顺序产生的消息来驱动程序的执行。不必预先确定消息产生的顺序，更符合客观世界的实际。并且面向对象程序设计方法提供了软件重用、解决大问题和复杂问题的有效途径，具有抽象性、封装性、继承性和多态性等特点。 7 / 39
（3） 结构化程序设计方法及面向对象程序设计方法在对待数据结构和算法关系上有 什么不同？ 【问题解答】 结构化程序设计方法中，把数据结构和算法分离为相互独立的实体； 而在面向对象程序设计中，数据结构和算法封装在一起，结合成一个独立的单位，即对象，并尽可能隐蔽对象的内部细节。对象的私有属性只能由这个对象的行为来读取和修改，及外部的联系通过公有行为充当外部接口。
第 2 章
从C到C++
面向对象程序设计教程（C++语言描述）题解及课程设计指导
第2章 从C到 C++ 8 / 39
一、 名词解释 引用内联函数重载函数 【问题解答】 所谓引用就是给对象取一个别名，使用该别名可以存取该对象。换句话说是使新对象和原对象共用一个地址。 内联函数是使用inline关键字声明的函数。 重载函数指在同一个作用域内名字相同而参数不同的函数。重载函数通常用来对具有相似行为而数据类型或数据个数不同的操作提供—个通用的名称。 二、 填空题 （1） 一般情况下，用C++语言编写的程序是由函数加上类组成的。 （2） C++有两种注释符号，一种是//，另一种是 /*……*/。 （3） 使用C++风格的输入输出，在程序中必须包含头文件“iostream”。 （4） cin是预定义的标准输入流对象，>>是输入操作符，也称提取运算符。 （5） cout是预定义的标准输出流对象，<入运算符。 （6） 指针的值是它所指向那个对象的地址值。指针的类型是它所指向对象的类型。指针的内容便是它所指向对象的值。 9 / 39
（7） C++使用运算符&来定义一个引用，对引用的存取都是对它所引用的对象的存取。 （8） 当一个函数调用出现在函数定义之前时，必须先用函数原型对函数进行声明。 （9） C++有值传递和引用传递两种参数传递机制。 （10） 使用关键字inline声明的函数称为内联函数。 （11） 运算符new用于进行动态内存分配，运算符delete用于释放动态分配的内存。 （12） 下面程序的输出结果为x=10，y=10；
x=100，y=100。 #include using namespace std; int main（） { int x=10，&y=x; cout<<"x="