c++primerplus中文版第六版源代码

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C++--primer-plus-(第6版)-中文版编程练习答案

第二章：开始学习C++//ex2.1--display your name and address#include<iostream>int main(void){using namespace std;cout<<"My name is liao chunguang and I live in hunan chenzhou.\n”；}//ex2.2--convert the furlong units to yard uints-把浪单位换位码单位#include<iostream>double fur2yd(double);int main(){using namespace std;cout<<"enter the distance measured by furlong units:";double fur;cin>>fur;cout<<"convert the furlong to yard"<<endl;double yd;yd=fur2yd(fur);cout<<fur<<" furlong is "<<yd<<" yard"<<endl;return 0;}double fur2yd(double t){return 220*t;}//ex2.3-每个函数都被调用两次#include<iostream>void mice();void see();using namespace std;int main(){mice();mice();see();see();return 0;}void mice(){cout<<"three blind mice"<<endl;}void see(){cout<<"see how they run"<<endl;}//ex2.4#include<iostream>int main(){using namespace std;cout<<"Enter your age:";int age;cin>>age;int month;month=age*12;cout<<age<<" years is "<<month<<" months"<<endl;return 0;}//ex2.5---convert the Celsius valve to Fahrenheit value#include<iostream>double C2F(double);int main(){using namespace std;cout<<"please enter a Celsius value:";double C;cin>>C;double F;F=C2F(C);cout<<C<<" degrees Celsius is "<<F<<" degrees Fahrenheit."<<endl;return 0;}double C2F(double t){return 1.8*t+32;}//ex2.6---convert the light years valve to astronomical units--把光年转换为天文单位#include<iostream>double convert(double);//函数原型int main(){using namespace std;cout<<"Enter the number of light years:";double light_years;cin>>light_years;double astro_units;astro_units=convert(light_years);cout<<light_years<<" light_years = "<<astro_units<<" astronomical units."<<endl; return 0;}double convert(double t){return 63240*t;//1 光年=63240 天文单位}//ex2.7--显示用户输入的小时数和分钟数#include<iostream>void show();main(){using namespace std;show();return 0;}void show(){using namespace std;int h,m;cout<<"enter the number of hours:";cin>>h;cout<<"enter the number of minutes:";cin>>m;cout<<"Time:"<<h<<":"<<m<<endl;}第三章：处理数据//ex3.1—将身高用英尺(feet)和英寸(inch)表示#include<iostream>const int inch_per_feet=12;// const 常量--1feet=12inches--1 英尺=12 英寸int main(){using namespace std;cout<<"please enter your height in inches:___\b\b\b";// \b 表示为退格字符int ht_inch;cin>>ht_inch;int ht_feet=ht_inch/inch_per_feet;//取商int rm_inch=ht_inch%inch_per_feet;//取余cout<<"your height is "<<ht_feet<<" feet,and "<<rm_inch<<" inches\n";return 0;}//ex3.2--计算相应的body mass index〔体重指数〕#include<iostream>const int inch_per_feet=12;const double meter_per_inch=0.0254;const double pound_per_kilogram=2.2;int main(){using namespace std;cout<<"Please enter your height:"<<endl;cout<<"First,enter your height of feet part〔输入你身高的英尺部分〕:_\b"; int ht_feet;cin>>ht_feet;cout<<"Second,enter your height of inch part〔输入你身高的英寸部分〕:_\b"; int ht_inch;cin>>ht_inch;cout<<"Now,please enter your weight in pound:___\b\b\b";double wt_pound;cin>>wt_pound;int inch;inch=ht_feet*inch_per_feet+ht_inch;double ht_meter;ht_meter=inch*meter_per_inch;double wt_kilogram;wt_kilogram=wt_pound/pound_per_kilogram;cout<<endl;cout<<"Your pensonal body information as follows:"<<endl;cout<<"身高:"<<inch<<"(英尺inch)\n"<<"身高:"<<ht_meter<<"(米meter)\n"<<"体重:"<<wt_kilogram<<"(千克kilogram)\n";double BMI;BMI=wt_kilogram/(ht_meter*ht_meter);cout<<"your Body Mass Index(体重指数) is "<<BMI<<endl;return 0;}//ex3.3 以度，分，秒输入，以度输出#include<iostream>const int minutes_per_degree=60;const int seconds_per_minute=60;int main(){using namespace std;cout<<"Enter a latitude in degrees,minutes,and seconds:\n";cout<<"First,enter the degrees:";int degree;cin>>degree;cout<<"Next,enter the minutes of arc:";int minute;cin>>minute;cout<<"Fianlly,enter the seconds of arc:";int second;cin>>second;double show_in_degree;show_in_degree=(double)degree+(double)minute/minutes_per_degree+(double)second/mi nutes_per_degree/seconds_per_minute;cout<<degree<<" degrees,"<<minute<<" minutes,"<<second<<"seconds="<<show_in_degree<<" degrees\n";return 0;}//ex3.4#include<iostream>const int hours_per_day=24;const int minutes_per_hour=60;const int seconds_per_minute=60;int main(){using namespace std;cout<<"Enter the number of seconds:";long seconds;cin>>seconds;int Day,Hour,Minute,Second;Day=seconds/seconds_per_minute/minutes_per_hour/hours_per_day;Hour=seconds/seconds_per_minute/minutes_per_hour%hours_per_day;Minute=seconds/seconds_per_minute%minutes_per_hour;Second=seconds%seconds_per_minute;cout<<seconds<<"seconds = "<<Day<<" days,"<<Hour<<" hours,"<<Minute<<" minutes,"<<Second<<" seconds\n";return 0;}//ex3.5#include<iostream>int main(){using namespace std;cout<<"Enter the world population:";long long world_population;cin>>world_population;cout<<"Enter the population of the US:";long long US_population;cin>>US_population;double percentage;percentage=(double)US_population/world_population*100;cout<<"The population of the US is "<<percentage<<"% of the world population.\n"; return 0;}//ex3.6 汽车耗油量-美国(mpg)or 欧洲风格(L/100Km)#include<iostream>int main(){using namespace std;cout<<"Enter the miles of distance you have driven:";double m_distance;cin>>m_distance;cout<<"Enter the gallons of gasoline you have used:";double m_gasoline;cin>>m_gasoline;cout<<"Your car can run "<<m_distance/m_gasoline<<" miles per gallon\n";cout<<"Computing by European style:\n";cout<<"Enter the distance in kilometers:";double k_distance;cin>>k_distance;cout<<"Enter the petrol in liters:";double k_gasoline;cin>>k_gasoline;cout<<"In European style:"<<"your can used "<<100*k_gasoline/k_distance<<" liters of petrol per 100 kilometers\n";return 0;}//ex3.7 automobile gasoline consumption-耗油量--欧洲风格(L/100Km)转换成美国风格(mpg) #include<iostream>int main(){using namespace std;cout<<"Enter the automobile gasoline consumption figure in\n"<<"European style(liters per 100 kilometers):";double Euro_style;cin>>Euro_style;cout<<"Converts to U.S. style(miles per gallon):"<<endl;cout<<Euro_style<<" L/100Km = "<<62.14*3.875/Euro_style<<" mpg\n";return 0;}// Note that 100 kilometers is 62.14 miles, and 1 gallon is 3.875 liters.//Thus, 19 mpg is about 12.4 L/100Km, and 27 mpg is about 8.7 L/100Km.Enter the automobile gasoline consumption figure inEuropean style(liters per 100 kilometers):12.4Converts to U.S. style(miles per gallon):12.4 L/100Km = 19.4187 mpgPress any key to continue// ex3.7 automobile gasoline consumption-耗油量--美国风格(mpg)转换成欧洲风格(L/100Km)#include<iostream>int main(){using namespace std;cout<<"Enter the automobile gasoline consumption figure in\n"<<"U.S. style(miles per gallon):";double US_style;cin>>US_style;cout<<"Converts to European style(miles per gallon):"<<endl;cout<<US_style<<" mpg = "<< 62.14*3.875/US_style<<"L/100Km\n";return 0;}// Enter the automobile gasoline consumption figure inU.S. style(miles per gallon):19Converts to European style(miles per gallon):19 mpg = 12.6733L/100KmPress any key to continue第四章复合类型//ex4.1 display the information of student#include<iostream>const int Asize=20;using namespace std;struct student//定义结构描述{char firstname[Asize];char lastname[Asize];char grade;int age;};void display(student);//函数原型放在结构描述后int main(){cout<<"what is your first name?"<<endl;student lcg;//创建结构变量〔结构数据对象〕cin.getline(lcg.firstname,Asize);cout<<"what is your last name?"<<endl;cin.getline(stname,Asize);cout<<"what letter grade do you deserve?"<<endl;cin>>lcg.grade;cout<<"what is your age?"<<endl;cin>>lcg.age;display(lcg);return 0;}void display(student name){cout<<"Name: "<<name.firstname<<","<<stname<<endl;cout<<"Grade:"<<char(name.grade+1)<<endl;cout<<"Age:"<<name.age<<endl;}//ex4.2 use the string-class instead of char-array#include<iostream>#include<string>int main(){using namespace std;string name,dessert;cout<<"Enter your name: \n";getline(cin,name);cout<<"Enter your favorite dessert: \n";getline(cin,dessert);cout<<"I have some delicious "<<dessert;cout<<" for you, "<<name<<".\n";return 0;}//有时候会遇到需要按下两次回车键才能正确的显示结果，这是vc++6.0 的一个BUG，更改如下：else if (_Tr::eq((_E)_C, _D)){_Chg = true;_I.rdbuf()->sbumpc();//修改后的break; }ex4.3 输入其名和姓，并组合显示#include<iostream>#include<cstring>const int Asize=20;int main(){using namespace std;char fname[Asize];char lname[Asize];char fullname[2*Asize+1];cout<<"Enter your first name:";//输入名字，存储在fname[]数组中cin.getline(fname,Asize);cout<<"Enter your last name:";//输入姓，存储在lname[]数组中cin.getline(lname,Asize);strncpy(fullname,lname,Asize);//把姓lname 复制到fullname 空数组中strcat(fullname,", ");//把“，”附加到上述fullname 尾部strncat(fullname,fname,Asize);//把fname 名字附加到上述fullname 尾部fullname[2*Asize]='\0';//为防止字符型数组溢出，在数组结尾添加结束符cout<<"Here's the information in a single string:"<<fullname<<endl;//显示组合结果return 0;}#define _CRT_SECURE_NO_WARNINGS#include <iostream>#include <cstring>const int Asize = 20;int main(){using namespace std;char firstname[Asize];char lastname[50];cout << "Enter your first name: ";cin.getline(firstname,Asize);cout << "Enter your last name: ";cin.getline(lastname,50);strcat(lastname,", ");strncat(lastname,firstname,Asize);cout << "Here's the information in a single string: "<< lastname <<endl;return 0;}//ex4.4 使用string 对象存储、显示组合结果#include<iostream>#include<string>int main(){using namespace std;string fname,lname,attach,fullname;cout<<"Enter your first name:";getline(cin,fname);//note:将一行输入读取到string 类对象中使用的是getline(cin,str) //它没有使用句点表示法，所以不是类方法cout<<"Enter your last name:";getline(cin,lname);attach=", ";fullname=lname+attach+fname;cout<<"Here's the information in a single string:"<<fullname<<endl;return 0;}//ex4.5 declare a struct and initialize it 声明结果并创建一个变量#include<iostream>const int Asize=20;struct CandyBar{char brand[Asize];double weight;int calory;};int main(){using namespace std;CandyBar snack={"Mocha Munch",2.3,350};cout<<"Here's the information of snack:\n";cout<<"brand:"<<snack.brand<<endl;cout<<"weight:"<<snack.weight<<endl;cout<<"calory:"<<snack.calory<<endl;return 0;}//ex4.6 结构数组的声明及初始化#include<iostream>const int Asize=20;struct CandyBar{char brand[Asize];double weight;int calory;};int main(){using namespace std;CandyBar snack[3]={{"Mocha Munch",2.3,350},{"XuFuJi",1.1,300},{"Alps",0.4,100}};for(int i=0;i<3;i++)//利用for 循环来显示snack 变量的内容{cout<<snack[i].brand<<endl<<snack[i].weight<<endl<<snack[i].calory<<endl<<endl;}return 0;}//ex4.7 pizza 披萨饼#include<iostream>#include<string>const int Size=20;struct pizza//声明结构{char company[Size];double diameter;double weight;};int main(){using namespace std;pizza pie;//创建一个名为pie 的结构变量cout<<"What's the name of pizza company:";cin.getline(pie pany,Size);cout<<"What's the diameter of pizza:";cin>>pie.diameter;cout<<"What's the weight of pizza:";cin>>pie.weight;cout<<"company:"<<pie pany<<endl;cout<<"diameter:"<<pie.diameter<<"inches"<<endl;cout<<"weight:"<<pie.weight<<"ounches"<<endl;return 0;}//ex4.8 pizza pie 披萨饼使用new 创建动态结构#include<iostream>#include<string>const int Size=20;struct pizza//声明结构{char company[Size];double diameter;double weight;};int main(){using namespace std;pizza *pie=new pizza;//使用new 创建动态结构cout<<"What's the diameter of pizza:";cin>>pie->diameter;cin.get();//读取下一个字符cout<<"What's the name of pizza company:";cin.get(pie->company,Size);cout<<"What's the weight of pizza:";cin>>pie->weight;cout<<"diameter:"<<pie->diameter<<" inches"<<endl;cout<<"company:"<<pie->company<<endl;cout<<"weight:"<<pie->weight<<" ounches"<<endl;delete pie;//delete 释放内存return 0;}//ex.4.9 使用new 动态分配数组—方法1#include<iostream>#include<string>using namespace std;struct CandyBar{string brand;double weight;int calory;};int main(){CandyBar *snack= new CandyBar[3];snack[0].brand="A";//单个初始化由new 动态分配的内存snack[0].weight=1.1;snack[0].calory=200;snack[1].brand="B";snack[1].weight=2.2;snack[1].calory=400;snack[2].brand="C";snack[2].weight=4.4;snack[2].calory=500;for(int i=0;i<3;i++){cout << " brand: " << snack[i].brand << endl;cout << " weight: " << snack[i].weight << endl;cout << " calorie: " << snack[i].calory << endl<<endl;}delete [] snack;return 0;}//ex.4.10 数组—方法1#include <iostream>int main(){using namespace std;const int Size = 3;int success[Size];cout<<"Enter your success of the three times 40 meters running:\n"; cin >> success[0]>>success[1]>>success[2];cout<<"success1:"<<success[0]<<endl;cout<<"success2:"<<success[1]<<endl;cout<<"success3:"<<success[2]<<endl;double average=(success[0]+success[1]+success[2])/3;cout<<"average:"<<average<<endl;return 0;}//ex.4.10 array—方法2#include <iostream>#include <array>int main(){using namespace std;array<double,4>ad={0};cout<<"Enter your success of the three times 40 meters running:\n"; cin >> ad[0]>>ad[1]>>ad[2];cout<<"success1:"<<ad[0]<<endl;cout<<"success2:"<<ad[1]<<endl;cout<<"success3:"<<ad[2]<<endl;ad[3]=(ad[0]+ad[1]+ad[2])/3;cout<<"average:"<<ad[3]<<endl;return 0;}第五章循环和关系表达式//ex.5.1#include <iostream>int main(){using namespace std;cout<<"Please enter two integers: ";int num1,num2;cin>>num1>>num2;int sum=0;for(int temp=num1;temp<=num2;++temp)//or temp++sum+=temp;cout<<"The sum from "<<num1<<" to "<<num2<<" is "<<sum<<endl; return 0;}//ex.5.2#include <iostream>#include<array>int main(){using namespace std;array<long double,101>ad={0};ad[1]=ad[0]=1L;for(int i=2;i<101;i++)ad[i]=i*ad[i-1];for(int i=0;i<101;i++)cout<<i<<"! = "<<ad[i]<<endl;return 0;}#include <iostream>#include <array>using namespace std;int main(){array<long double, 101> multiply;multiply[0] = multiply[1] = 1LL;for (int i = 2; i <= 100; i++)multiply[i] = multiply[i-1]*i;cout << multiply[100];return 0;}//ex.5.3#include <iostream>int main(){using namespace std;cout<<"Please enter an integer: ";int sum=0,num;while((cin>>num)&&num!=0){sum+=num;cout<<"So far, the sum is "<<sum<<endl;cout<<"Please enter an integer: ";}return 0;}//ex.5.4#include <iostream>int main(){using namespace std;double sum1,sum2;sum1=sum2=0.0;int year=0;while(sum2<=sum1){++year;sum1+=10;sum2=(100+sum2)*0.05+sum2;}cout<<"经过"<<year<<"年后，Cleo 的投资价值才能超过Daphne 的投资价值。

C-Primer-Plus第六版中文版习题答案

C Primer Plus第六版中文版习题答案Github: /zhayujie/C-Primer-Plus第一章1.#include <stdio.h>int main(void) {double inch, cm;printf("Please input the inches: ");scanf("%lf", &inch);cm = inch * 2.54;printf("%g cm\n", cm);return 0;}第二章3.#include<stdio.h>int main(void){int days,years=21;days=years*365;printf("我的年龄是%d岁，%d天\n",years,days);return 0;}4.#include<stdio.h>void jolly(void);void deny(void);int main(void){jolly();jolly();deny();return 0;}void jolly(void){printf("For he's a jolly good fellow!\n"); }void deny(void){printf("Which nobody can deny!\n");}5.#include<stdio.h>void br(void);void ic(void);int main(void){br();printf(",");ic();printf("\n");ic();printf("\n");br();printf("\n");return 0;}void br(void){printf("Brazil,Russia");}void ic(void){printf("India,China");}6.#include<stdio.h>int main(void){int toes=10;int toes_2,toes2;toes_2=2*toes;toes2=toes*toes;printf("toes是%d,toes的两倍是%d,toes的平方是%d\n",toes,toes_2,toes2); return 0;}8.#include<stdio.h>void one_three(void);void two(void);int main(void){printf("starting now\n");one_three();}void one_three(void){printf("one\n");two();printf("three\n");printf("done!\n");}void two(void){printf("two\n");}第三章2.#include<stdio.h>int main(void){char ch;printf("please input a number:");scanf("%d",&ch);printf("%c\n",ch);return 0;}4.#include<stdio.h>int main(void){float a;printf("Enter a floating-point value: ");scanf("%f",&a);printf("fixed-point notation: %f\n",a);printf("exponential notation: %e\n",a);return 0;}5.#include<stdio.h>int main(void){int age;double seconds;printf("please input your age: ");scanf("%d",&age);seconds=age*3.156e7;printf("the corresponding seconds are: %e\n",seconds);return 0;}7.#include<stdio.h>int main(void){float inches,cms;printf("input your height(inch): ");scanf("%f",&inches);cms=inches*2.54;printf("your height(cm): %f\n",cms);return 0;}8.#include<stdio.h>int main(void){float pint,ounce,soupspoon,teaspoon,cup;printf("input the number of cups: ");scanf("%f",&cup);pint=cup/2;ounce=cup*8;soupspoon=ounce*2;teaspoon=soupspoon*3;printf("they are equivalent of:\n%f pint\n%f ounce\n%f soupspoons\n%f teaspoons\n",pint,ounce,soupspoon,teaspoon);return 0;}第四章1.#include<stdio.h>int main(void){char firstname[40],lastname[40];printf("Input your firstname: ");scanf("%s",firstname);printf("Input your lastname: ");scanf("%s",lastname);printf("Your name is %s,%s\n",firstname,lastname);return 0;}2.#include<stdio.h>#include<string.h>int main(void){char name[40];int width;printf("Input your name: ");scanf("%s",name);width=strlen(name)+3;printf("%*s\n",width,name); //输入的名和姓中间不能分隔return 0;}4.#include<stdio.h>int main(void){float height;char name[40];printf("Input your height(cm) and name: ");scanf("%f%s",&height,name);height=height/100;printf("%s, you are %.3fm tall\n",name,height);return 0;}5.#include<stdio.h>int main(void){float speed,size,time;printf("Input the download speed(Mb/s) and the file size(MB):\n"); scanf("%f%f",&speed,&size);time=size/speed*8.0;printf("At %.2f megabits per second, a file of %.2f megabytes\n",speed,size);printf("downloads in %.2f seconds.\n",time);return 0;}6.#include<stdio.h>#include<string.h>int main(void){char firstname[40],lastname[40];printf("Input your firstname: ");scanf("%s",firstname);printf("Input your lastname: ");scanf("%s",lastname);printf("%s %s\n",firstname,lastname);printf("%*d %*d\n",strlen(firstname),strlen(firstname),strlen(lastname),strlen(lastname)); printf("%s %s\n",firstname,lastname);printf("%*d %*d\n",-strlen(firstname),strlen(firstname),-strlen(lastname),strlen(lastname) );return 0;}7.#include<stdio.h>#include<float.h>int main(void){double a=1.0/3.0;float b=1.0/3.0;printf("%.6f %.6f\n",a,b); //左侧double型右侧float型printf("%.12f, %.12f\n",a,b);printf("%.16f, %.16f\n",a,b);printf("DBL_DIG: %d\n",DBL_DIG);printf("FLT_DIG: %d\n",FLT_DIG);return 0;}8.#include<stdio.h>#define GALLON 3.758 //1 gallon=3.785 liters#define MILE 1.609 //1 mile=1.609 kilometersint main(void){float gallon,mile;printf("Input miles and gallons: ");scanf("%f%f",&mile,&gallon);printf("Miles per gallon: %.1f\n",mile/gallon);printf("Litre per 100 kilometers: %.1f\n",gallon*GALLON/(mile*MILE)*100);return 0;}第五章1.#include<stdio.h>#define H_P_M 60 //1h=60minint main(void){int hour,min,left;printf("Enter the number of minutes: ");scanf("%d",&min);while(min>0){hour=min/H_P_M;left=min%H_P_M;printf("%d minutes is %d hours and %d minutes.\n",min,hour,left); printf("Enter your next value: ");scanf("%d",&min);}printf("Good bye!\n");return 0;}2.#include<stdio.h>int main(void){int num,count;printf("Input a integer: ");scanf("%d",&num);count=0;while(count++<11){printf("%d ",num);num++;}printf("\n");return 0;}3.#include<stdio.h>#define DAYS_PER_WEEK 7 //一周7天int main(void){int day,week,left;printf("Input the number of days: ");scanf("%d",&day);while(day>0){week=day/DAYS_PER_WEEK;left=day%DAYS_PER_WEEK;printf("%d days are %d weeks, %d days.\n",day,week,left); printf("Next input: ");scanf("%d",&day);}return 0;}4.#include<stdio.h>#define CM_PER_FEET 30.48 //1feet=30.48cm#define CM_PER_INCH 2.54 //1inch=2.54cmint main(void){int feet;float cm,inch;printf("Enter a height in centimeters: ");scanf("%f",&cm);while(cm>0){feet=(int)(cm/CM_PER_FEET);inch=(cm-feet*CM_PER_FEET)/CM_PER_INCH;printf("%.1f cm = %d feet, %.1f inches\n",cm,feet,inch); printf("Enter a height in centimeters (<=0 to quit): "); scanf("%f",&cm);}printf("bye\n");return 0;}5.#include<stdio.h>int main(void){int count,sum,days;printf("Input the number of days: ");scanf("%d",&days);count=sum=0;while(count++<days)sum=sum+count;printf("The money you earned: %d\n",sum);return 0;}6.#include<stdio.h>int main(void){int count,sum,days;printf("Input the number of days: ");scanf("%d",&days);count=sum=0;while(count++<days)sum=sum+count*count;printf("The money you earned: %d\n",sum);return 0;}7.#include<stdio.h>void cube(double n);int main(void){double num;printf("Input a number: ");scanf("%lf",&num);cube(num);}void cube(double n){printf("The cube of %f is %f\n",n,n*n*n);}8.#include<stdio.h>int main(void){int num1,num2;printf("This program computes moduli.\n");printf("Enter an integer to serve as the second operand: ");scanf("%d",&num1);printf("Now enter the first operand: ");scanf("%d",&num2);while(num2>0){printf("%d %% %d is %d\n",num2,num1,num2%num1);printf("Enter next number for first operand (<= 0 to quit): "); scanf("%d",&num2);}printf("Done\n");}9.#include<stdio.h>void Temperatures(double fah);int main(void){double fah,cel,kel;//华氏温度，摄氏温度，开氏温度printf("Input the Fahrenheit temperature: ");while(scanf("%lf",&fah)==1){Temperatures(fah);printf("Next input: ");}printf("Done.\n");}void Temperatures(double fah){const double a=5.0,b=9.0,c=32.0,d=276.13; printf("%.2f ℉ is %.2f ℃, %.2f K.\n",fah,a/b*(fah-c),a/b*(fah-c)+d);}第六章1.#include<stdio.h>#define SIZE 26int main(void){char ch[SIZE];int index;for(index=0;index<SIZE;index++){ch[index]='a'+index;printf("%c ",ch[index]);}printf("\n");return 0;}2.#include<stdio.h>int main(void){int i,j;for(i=1;i<=5;i++){for(j=1;j<=i;j++)printf("$");printf("\n");}return 0;}3.#include<stdio.h>int main(void){int i,j;for(i=1;i<=6;i++){for(j=0;j<i;j++)printf("%c",'F'-j); printf("\n");}return 0;}4.#include<stdio.h>#define ROWS 6int main(void){char ch;int i,j;for(ch='A',i=0;i<ROWS;i++) {for(j=0;j<=i;j++)printf("%c",ch++); printf("\n");}return 0;}5.#include<stdio.h>#define ROWS 5int main(void){char ch='A';int i,j;for(i=1;i<=ROWS;i++){for(j=1;j<=ROWS-i;j++)printf(" ");for(j=0;j<i;j++)printf("%c",ch+j);for(j=i-2;j>=0;j--)printf("%c",ch+j);printf("\n");}return 0;}6.#include<stdio.h>int main(void){int max,min,num;printf("Input the min and max: ");scanf("%d%d",&min,&max);printf("%10s%10s%10s\n","number","square","cube");for(num=min;num<=max;num++)printf("%10d%10d%10d\n",num,num*num,num*num*num); return 0;}7.//与题目不同打印的是句子#include<stdio.h>#include<string.h>#define SIZE 40int main(void){int i,index=-1;char ch[SIZE];printf("Input a word: ");do{ index++;scanf("%c",&ch[index]);}while(ch[index]!='\n');for(i=index+1;i<=40;i++)ch[i]='\0';for(index=strlen(ch);index>=0;index--)printf("%c",ch[index]);printf("\n");return 0;}8.#include<stdio.h>int main(void){double n1,n2;printf("Input two numbers: ");while(2==scanf("%lf%lf",&n1,&n2)){printf("%f\n",(n1-n2)/n1*n2);printf("Input your next pair of numbers: ");}printf("Bye!\n");return 0;}9.#include<stdio.h>double calculate(double n1, double n2);int main(void){double num1, num2;printf("Input two numbers: ");while (2 == scanf("%lf%lf", &num1, &num2)) //输入两个浮点数 {printf("%f\n", calculate(num1, num2)); //函数调用printf("Input your next pair of numbers: ");}printf("Bye!\n");return 0;}double calculate(double n1, double n2){return ((n1 - n2) / (n1 * n2)); //返回运算结果}10.#include <stdio.h>int main(void){int lower, upper;int num, sum;printf("Enter lower and upper integer limits: ");scanf("%d%d", &lower, &upper);while (lower < upper){for (sum=0, num=lower; num <= upper; num++)sum = sum + num * num; //计算平方和printf("The sums of the squares from %d to %d is %d\n", lower * lower, upper * upper, sum); //输出结果printf("Enter next set of limits: ");scanf("%d%d", &lower, &upper); //下一次输入}printf("Done\n");return 0;}11.#include <stdio.h>#define SIZE 8int main(void){int num[SIZE];int index;printf("Enter 8 integers: ");for (index=0; index<SIZE; index++) //输入8个整数scanf("%d", &num[index]);for (index=SIZE-1; index >= 0; index--) //倒序输出printf("%d ", num[index]);printf("\n");return 0;}12.#include <stdio.h>int main(void){double sum1=0, sum2=0;int count, items, sign;printf("Enter the items: ");scanf("%d", &items); //输入序列的项数for (count=1, sign=1; count <= items; count++, sign *= -1){sum1 += 1.0 / count;sum2 += 1.0 * sign / count;} //分别计算两序列的和 printf("1.0 + 1.0/2.0 + 1.0/3.0 + 1.0/4.0 + ... = %f\n", sum1); printf("1.0 - 1.0/2.0 + 1.0/3.0 - 1.0/4.0 + ... = %f\n", sum2);return 0;}13.#include <stdio.h>#define SIZE 8int main(void){int index, count, num[SIZE];for (index = 0, count = 1; index < SIZE; index++){count *= 2;num[index] = count;} //for循环将数组元素设为2的前8次幂 index=0; //初始化index的值doprintf("%d ", num[index++]);while (index < SIZE); //do while循环显示数组元素的值printf("\n");return 0;}14.#include <stdio.h>#define SIZE 8int main(){double num1[SIZE], num2[SIZE];int index1, index2, index;printf("Enter 8 numbers to the first array:\n");for (index1 = 0; index1 < SIZE; index1++)scanf("%lf", &num1[index1]); //向第一个数组输入8个数 num2[0] = num1[0];for (index1 = 1, index2 = 1; index1 < SIZE; index1++, index2++) num2[index2] = num2[index2-1] + num1[index1];//为第二个数组赋值（是第一个数组对应的元素之和）printf("The first array: ");for (index=0; index < SIZE; index++) {printf("%6.2f", num1[index]);} //输出第一个数组的内容 printf("\nThe second array: ");for (index=0; index < SIZE; index++) {printf("%6.2f", num2[index]); //输出第二个数组的内容 }printf("\n");return 0;}15.#include <stdio.h>#include <string.h>#define SIZE 255int main(void){int index;char ch[SIZE];printf("Enter a line: ");for(index = 0, scanf("%c", &ch[0]); ch[index] != '\n';){index++;scanf("%c", &ch[index]);} //输入内容到字符数组中,回车时结束for(index += 1; index < SIZE; index++)ch[index] = '\0'; //将数组剩余空间补充为'\0'for(index = strlen(ch); index >=0; index--)printf("%c", ch[index]); //倒序输出内容printf("\n");return 0;}16.#include <stdio.h>#define RATE_DAPHNE 0.1#define RATE_DEIRDRE 0.05 //两人的利率#define MONEY 100int main(void){int year;double daphne = MONEY, deirdre = MONEY; //两人的初始投资额相同for (year = 1; daphne >= deirdre; year++){daphne += MONEY * RATE_DAPHNE;deirdre += deirdre * RATE_DEIRDRE;}//计算Deirdre投资额超过Daphne需要的年数和当时的金额printf("After %d year, Deirdre's investment will be more than Daphne's,\n""Daphne's investment will be $%lf,\nand Deirdre's investment will be $%lf.\n",year, daphne, deirdre); //输出结果return 0;}17.#include <stdio.h>#define INITIAL_MONEY 100 //账户初始金额为100万元#define ANNUAL_RATE 0.08 //年利率为8%int main(void){int year;double money;for(year = 1, money=INITIAL_MONEY; money>0; year++)money += money * ANNUAL_RATE - 10; //计算每年年终的账户余额printf("After %d years, Chuckie will draw all money from his account.\n", year);return 0;}18.#include <stdio.h>#define INITIAL_NUMBER 5 //初始朋友数为5人#define DUNBAR_NUMBER 150 //邓巴数int main(void){int week;int number = INITIAL_NUMBER;for (week = 1; number <= DUNBAR_NUMBER; week++){number = (number - week) * 2; //计算每周的朋友数量printf("After %d week, the number of Rabnud's friends is %d\n", week, number);}return 0;}第七章1.#include <stdio.h>int main(void){char ch;int n_space = 0; //空格数int n_newline = 0; //换行数int n_others = 0; //其他字符数printf("Enter some text; Enter # to quit.\n"); while ((ch = getchar()) != '#'){if (ch == ' ')n_space++;else if (ch == '\n')n_newline++;elsen_others++;}printf("Spaces: %d, newlines: %d, others: %d\n", n_space, n_newline, n_others);return 0;}2.#include <stdio.h>#define CHARS_PER_LINE 8 //每行字符数int main(void){char ch;int n_chars = 1; //字符数printf("Enter some characters(# to quit):\n"); while ((ch = getchar()) != '#'){printf("%3c(%3d) ", ch, ch);if (n_chars++ % CHARS_PER_LINE == 0)printf("\n");}printf("\n");return 0;}3.#include <stdio.h>int main(void){int num;int n_even = 0, n_odd = 0; //偶数和奇数个数int sum_even = 0, sum_odd = 0; //偶数和奇数和printf("Enter some integers(0 to quit):\n");scanf("%d", &num);while (num != 0){if (num % 2 == 0){n_even++;sum_even += num;} //计算偶数个数和偶数和else{n_odd++;sum_odd +=num;} //计算奇数个数和奇数和scanf("%d",&num);}printf("The number of even numbers is %d, ""and the everage of even numbers is %.2f\n",n_even, (n_even == 0) ? 0 : (float)sum_even / n_even); printf("The number of odd numbers is %d, ""and the everrage of odd numers is %.2f\n",n_odd, (n_odd == 0) ? 0 : (float)sum_odd / n_odd);return 0;}4.#include <stdio.h>int main(void){char ch;int n_repl = 0; //替换次数printf("Enter some texts(# to quit):\n");while ((ch = getchar()) != '#') {if (ch == '.'){ch = '!';n_repl++;} //替换句号else if (ch == '!'){printf("!");n_repl++;} //替换感叹号printf("%c", ch);}printf("\n%d substitutions were made.\n", n_repl);return 0;}5.#include <stdio.h>int main(void){char ch;int n_repl = 0; //替换次数printf("Enter some texts(# to quit):\n");while ((ch = getchar()) != '#') {switch (ch){case '.': ch = '!';n_repl++;break;case '!': printf("!");n_repl++;break;default: break;} //利用switch语句进行替换 printf("%c",ch);}printf("\n%d substitutions were made.\n", n_repl);return 0;}6.#include <stdio.h>int main(void){char ch;char last_ch = 0; //前一个字符int count=0;printf("Enter some texts(# to quit):\n");while ((ch = getchar()) != '#'){if ((ch == 'i') && (last_ch == 'e'))count++;last_ch = ch; //出现ei时，计数+1}printf("\"ei\" appeared %d times.\n", count);return 0;}7.#include <stdio.h>#define BASE 1000 //基本工资 100美元/h#define TIME 40 //超过40h为加班#define MUL 1.5 //加班时间算作平时的1.5倍#define RATE1 0.15 //前300美元的税率#define RATE2 0.2 //300-450美元的税率#define RATE3 0.25 //大于450美元的税率#define BREAK1 300 //税率的第一个分界点#define BREAK2 450 //税率的第二个分界点int main(void){double hour, tax, gross;printf("Input your work hours in a week: ");scanf("%lf", &hour);if (hour <= TIME)gross = hour * BASE;elsegross = TIME * BASE + (hour - TIME) * MUL * BASE; //计算总收入if (gross <= BREAK1)tax = gross * RATE1;else if (gross <= BREAK2)tax = BREAK1 * RATE1 + (gross - BREAK1) * RATE2;elsetax = BREAK1 * RATE1 + (BREAK2 - BREAK1) * RATE2+ (gross - BREAK2) * RATE3;//计算税金printf("Your gross income is $%.2lf\nYour tax is $%.2lf\n""Your net income is $%.2lf\n",gross, tax, (gross - tax));return 0;8.#include <stdio.h>#define BASE1 8.75#define BASE2 9.33#define BASE3 10.00#define BASE4 11.20//四种等级的基本工资#define TIME 40 //超过40h为加班#define MUL 1.5 //加班时间算作平时的1.5倍#define RATE1 0.15 //前300美元的税率#define RATE2 0.2 //300-450美元的税率#define RATE3 0.25 //大于450美元的税率#define BREAK1 300 //税率的第一个分界点#define BREAK2 450 //税率的第二个分界点int main(void){double base, hour, tax, gross;int count, num;const int LENGTH = 65; //*的长度printpart: for (count = 0; count < LENGTH; count++)printf("*");printf("\nEnter the number corresponding to the desired pay rate or action:\n");printf("%-36s%s","1) $8.75/hr", "2) $9.33/hr\n");printf("%-36s%s","3) $10.00/hr", "4) $11.20/hr\n");printf("%s\n", "5) quit");for (count = 0; count < LENGTH; count++)printf("*");printf("\n");//打印表格while (scanf("%d", &num) == 1) {switch (num){case 1: base = BASE1;break;case 2: base = BASE2;break;case 3: base = BASE3;break;case 4: base = BASE4;break;case 5: printf("quit.\n");return 0;default: printf("Please input the right option.\n");goto printpart;} //选择基本工资等级printf("Input your work hours in a week: ");scanf("%lf", &hour);if (hour <= TIME)gross = hour * base;elsegross = TIME * base + (hour - TIME) * MUL * base;//计算总收入if (gross <= BREAK1)tax = gross * RATE1;else if (gross <= BREAK2)tax = BREAK1 * RATE1 + (gross - BREAK1) * RATE2;elsetax = BREAK1 * RATE1 + (BREAK2 - BREAK1) * RATE2+ (gross - BREAK2) * RATE3;//计算税金printf("Your gross income is $%.2lf\nYour tax is $%.2lf\n" "Your net income is $%.2lf\n",gross, tax, (gross - tax));printf("\nYour next choice:\n");}return 0;}9.#include <stdio.h>int main(void){int div, prime;int num, count;int flag;printf("Input a positive integer: ");scanf("%d", &num);printf("The prime numbers in range:\n");for (prime = 2; prime <= num; prime++) //外层循环显示所有素数 {flag = 1;for (div = 2; (div * div) <= prime; div++){if (prime % div == 0)flag = 0;} //内层循环检验是否为素数 if (flag) //利用标记flag判断printf("%d ",prime);}printf("\n");return 0;}10.#include <stdio.h>#define RATE1 0.15#define RATE2 0.28#define SINGLE 17850 //单身人群的税率分界点#define HOST 23900 //户主人群的税率分界点#define MAR_SHA 29750 //已婚共有人群的分界点#define MAR_DEV 14875 //已婚离异人群的分界点int main(void){int num;double income, tax_break, tax;printpart: printf("Please enter Corresponding""figures to select the type\n");printf("1 single, 2 host, 3 married and shared, ""4 married but devoced and 5 to quit.\n");scanf("%d", &num);switch (num){case 1: tax_break = SINGLE;break;case 2: tax_break = HOST;break;case 3: tax_break = MAR_SHA;break;case 4: tax_break = MAR_DEV;break;case 5: printf("quit.\n");return 0;default: printf("Please input right number.");goto printpart; //回到输入阶段}printf("Enter your income: "); //指定种类和收入while (scanf("%lf", &income) == 1){if (income <= tax_break)tax = income * RATE1;elsetax = tax_break * RATE1 + (income - tax_break) * RATE2; //计算税金printf("The tax is $%.2lf.\n", tax);printf("Your next input: \n");goto printpart; //回到输入阶段}return 0;}11.#include <stdio.h>#include <ctype.h>#define ARTICHOKE 2.05 //洋蓟2.05美元/磅#define BEET 1.15 //甜菜1.15美元/磅#define CARROT 1.09 //胡萝卜1.09美元/磅#define DISCOUNT_LIMIT 100//包装费和运费打折要求订单100美元#define DISCOUNT_RATE 0.05 //折扣为%5#define BREAK1 5#define BREAK2 20 //装运费的分界点#define FEE1 6.5#define FEE2 14#define FEE3_RATE 0.5//不同重量区间的装运费，其中超过20磅的每续重一磅//增加0.5元int main(void){double weight;double weight_artichoke = 0;double weight_beet = 0;double weight_carrot = 0; //购买三种蔬菜的重量double total_weight; //总重量double veg_cost; //三种蔬菜总共花费double order_cost; //订单总额double total_cost; //费用总额double pack_tran_fee; //装运费double discount;int count = 0;char ch;printf("Please select the vegetables you want to buy:\n");printf("a: artichoke $%.2f/lb\n", ARTICHOKE);printf("b: beet $%.2f/lb\n", BEET);printf("c: carrot $%.2f/lb\n", CARROT);printf("q: quit.\n");//打印选择信息while ((ch = tolower(getchar())) != 'q'){// if (ch == '\n')// continue; //滤掉回车switch (ch){case 'a': printf("Input the weight of artichoke in pound: "); scanf("%lf", &weight);weight_artichoke += weight;count++;printf("Continue entering a, b, c or q: ");break;case 'b': printf("Input the weight of beet in pound: ");scanf("%lf", &weight);weight_beet += weight;count++;printf("Continue entering a, b, c or q: ");break;case 'c': printf("Input the weight of carrot in pound: ");scanf("%lf", &weight);weight_carrot += weight;count++;printf("Continue entering a, b, c or q: ");break;default: printf("Please enter the right character.");}while (getchar () != '\n')continue; //滤掉输入重量后面的所有字符}if (!count){printf("Bye.\n");return 0;} //开始输出q，直接退出total_weight = weight_artichoke + weight_beet + weight_carrot;veg_cost = weight_artichoke * ARTICHOKE + weight_beet * BEET+ weight_carrot * CARROT;discount = 0;if (veg_cost >= DISCOUNT_LIMIT){discount = veg_cost * DISCOUNT_RATE;order_cost = veg_cost - discount;}elseorder_cost = veg_cost; //折扣计算if (total_weight <= BREAK1)pack_tran_fee = FEE1;else if (total_weight <= BREAK2)pack_tran_fee = FEE2;elsepack_tran_fee = FEE2 + (total_weight - BREAK2) * FEE3_RATE;//装运费计算total_cost = order_cost + pack_tran_fee;printf("\nHere is what you choose:\n");if (weight_artichoke) {printf("artichoke Price: $%.2f/lb weight: %.2f pounds cost: $%.2f\n",ARTICHOKE, weight_artichoke, weight_artichoke * ARTICHOKE); }if (weight_beet) {printf("beet Price: $%.2f/lb weight: %.2f pounds cost: $%.2f\n",。

C++PrimerPlus中文第六版第六章编程练习

if(isalpha(ch)) {
if (islower(ch)) {
ch = toupper(ch); } else {
ch = tolower(ch); } cout << ch; } cin >> ch; } cout << endl; cout << "Press any key to return."; cin.get(); cin.get(); return 0; */ //2
return 0; */ //7 //8、
ofstream fw; fw.open("juankuanxinxi.txt");//汉语命名乱码 struct juankuan {
string name; double kuanxiang; }; int shumu; cout << "输入捐献者数目："; cin >> shumu; fw << "捐款者数目：" << shumu << endl; juankuan * pt = new juankuan[shumu]; int i; int count = 0; for (i = 0;i < shumu;i++) { cout << "输入第" << i + 1 << "位捐款者姓名："; cin >> pt[i].name; fw << "第" << i +1 << "位捐款者姓名：" << pt[i].name << endl; cout << "输入捐款数额："; cin >> pt[i].kuanxiang; fw << "捐款数额：" << pt[i].kuanxiang << endl; } cout << "重要捐款者姓名和捐款数额：\n"; fw << "重要捐款者：\n"; for (i = 0;i < shumu;i++) { if (pt[i].kuanxiang > 10000) {

C++-Primer-Plus(第六版)编程习题解答

{
using namespace std;
int degrees;
int minutes;
int seconds;
double latitude;
cout << "Enter a latitude in degrees, minutes, and seconds:\n";
cout << "First, enter the degrees: ";
const double LITERS_PER_GALLON = 3.875;
int main ( void )
{
using namespace std;
double euro_rating;
double us_rating;
cout << "Enter fuel consumption in liters per 100 km: ";
#include <iostream>
const int Inch_Per_Foot = 12;
int main(void)
{
using namespace std;
// Note: some environments don't support the backspace character
cout << "Please enter your height in inches: ___/b/b/b ";
cout << C << " degrees Celsius = "
<< F << " degrees Fahrenheit\n";

c++ primer plus 中文版第六版源代码

C++ primer plus 中文版第六版源代码第二章到第四章，后续继续更新………第二章1：#include<iostream>void main(){using namespace std;int carrots;carrots=25;cout<<"I have ";cout<<carrots;cout<<"carrots.";cout<<endl;carrots=carrots-1;cout<<"Crunch,crunch.Now I have "<<carrots<<" carrots"<<endl; }2：#include<iostream>int stonetolb(int);int main(){using namespace std;int stone;cout<<"Enter the weight in stone: ";cin>>stone;int pounds=stonetolb(stone);cout<<stone<<" stone= ";cout<<pounds<<" pounds."<<endl;return 0;}int stonetolb(int sts){return 14*sts;}3：#include<iostream>void main(){using namespace std;int carrots;carrots=25;cout<<"How many carrots do you have?"<<endl;cin>>carrots;cout<<"Here are two more.";carrots=carrots+2;cout<<"Now you have "<<carrots<<" carrots."<<endl;//下两行专门测试cin.get（）cin.get();cin.get();}4：#include<iostream>using namespace std;void main(){cout<<"Come up and C++ me some time.";cout<<endl;cout<<"You won't regret it!"<<endl;}5#include<iostream>void simon(int);int main(){using namespace std;simon(3);cout<<"Pick an integer: ";int count;cin>>count;simon(count);cout<<"Done !"<<endl;return 0;}void simon(int n){using namespace std;cout<<"Simon says touch your toes "<<n<<" times."<<endl; }6：#include<iostream>#include<cmath>void main(){using namespace std;double area;cout<<"Enter the floor arae,in square feet,of your home: ";cin>>area;double side;side=sqrt(area);cout<<"That's the equivalent of a square "<<side<<" feet to the side."<<endl;cout<<"How fascinating!"<<endl;}第三章1：#include<iostream>#include<climits>using namespace std;int main(){int n_int=INT_MAX;short n_short=SHRT_MAX;long n_long=LONG_MAX;cout<<"int is "<<sizeof(int)<<" bytes."<<endl;cout<<"short is"<<sizeof n_short<<" bytes."<<endl;cout<<"long is"<<sizeof n_long<<" bytes."<<endl<<endl;cout<<"Maximum values :"<<endl;cout<<"int :"<<n_int<<endl;cout<<"short :"<<n_short<<endl;cout<<"long :"<<n_long<<endl;cout<<"Minimum int value = "<<INT_MIN<<endl;cout<<"Bits per byts = "<<CHAR_BIT<<endl;return 0;}2：#include<iostream>#include<climits>#define ZERO 0using namespace std;int main(){short sam=SHRT_MAX;unsigned short sue=sam;cout<<"sam has "<<sam<<" dollars and sue has "<<sue;cout<<" dollars deposited."<<endl<<"Add $1 to each account."<<endl<<"Now ";sam=sam+1;sue=sue+1;cout<<"Sam has "<<sam<<" dollars and sue has "<<sue;cout<<" dollars deposited.\npoor sam!"<<endl;sam=ZERO;sue=ZERO;cout<<"sam has "<<sam<<" dollars and sue has "<<sue;cout<<" dollars deposited."<<endl;cout<<"Take $1 from each account."<<endl<<"Now ";sam=sam-1;sue=sue-1;cout<<"sam has "<<sam<<" dolars and sue has "<<sue;cout<<" dollars deposited."<<endl<<"Lucky sue!"<<endl;return 0;}3：#include<iostream>using namespace std;void main(){int chest=42;int waist=0x42;int inseam=042;cout<<"Monsieur cuts a striking figure!\n";cout<<"chest = "<<chest<<" (42 in decimal)\n";cout<<"waist = "<<waist<<" (0x42 in hex)\n";cout<<"inseam ="<<inseam<<" (042 in octal)\n";}4：#include<iostream>using namespace std;void main(){int chest=42;int waist=42;int inseam=42;cout<<"Monsieur cuts a striking figure!\n";cout<<"chest = "<<chest<<" (decimal for 42)"<<endl;cout<<hex;cout<<"waist = "<<waist<<" (hexadecimal for 42)"<<endl;cout<<oct;cout<<"inseam ="<<inseam<<" (octal for 42)\n"<<endl; }5：#include<iostream>using namespace std;void main(){cout<<"\aoperation \"HyperHype\" is now activated!\n";cout<<"Enter your agent code:__________\b\b\b\b\b\b\b\b";long code;cin>>code;cout<<"\aYou entered "<<code<<" ...\n";cout<<"\acode verified !proceed with plan z3!\n";}6：#include<iostream>using namespace std;void main(){char ch;cout<<"Enter a character:"<<endl;cin>>ch;cout<<"Hola! ";cout<<"Thank you for the "<<ch<<" character."<<endl;}7：#include<iostream>using namespace std;void main(){char ch='M';int i=ch;cout<<"The ASCII code for "<<ch<<" is "<<i<<endl;cout<<"Add one to the character code:"<<endl;ch=ch+1;i=ch;cout<<"The ASCII code for "<<ch<<" is "<<i<<endl;cout<<"Displaying char ch using cout.put(ch): ";cout.put(ch);cout.put('!');cout<<endl<<"Done"<<endl;}8：#include<iostream>using namespace std;void main(){cout.setf(ios_base::fixed,ios_base::floatfield);//控制cout显示的形式float tub=10.0/3.0;double mint=10.0/3.0;const float million=1.0e6;cout<<"tub = "<<tub;cout<<", a million tubs = "<<million*tub;cout<<",\nand ten million tubs = ";cout<<10*million*tub<<endl;cout<<"mint = "<<mint<<" and a million mints = ";cout<<million*mint<<endl;}9：#include<iostream>using namespace std;void main(){float a=2.34e+22f;float b=a+1.0f;cout<<"a= "<<a<<endl;cout<<"b-a= "<<b-a<<endl;}10：#include<iostream>using namespace std;void main(){double hats,heads;//或者是floatcout.setf(ios_base::fixed,ios_base::floatfield);cout<<"Enter a number: ";cin>>hats;cout<<"Enter another number: ";cin>>heads;cout<<"hats = "<<hats<<";heads = "<<heads<<endl;cout<<"hats+heads = "<<hats+heads<<endl;cout<<"hats-heads = "<<hats-heads<<endl;cout<<"hats*heads = "<<hats*heads<<endl;cout<<"hats/heads = "<<hats/heads<<endl;}11：#include<iostream>using namespace std;void main(){cout.setf(ios_base::fixed,ios_base::floatfield);cout<<"Integer division:9/5= "<<9/5<<endl;cout<<"Floating-point division: 9.0/5.0 = ";cout<<9.0/5.0<<endl;cout<<"Mixed division: 9.0/5 = "<<9.0/5<<endl;cout<<"double constants:1.e7/9.0 = ";cout<<1.e7/9.0<<endl;cout<<"float constants:1.e7f/9.0f = ";cout<<1.e7f/9.0f<<endl;}12：#include<iostream>using namespace std;void main(){const int Lbs_per_stn=14;int lbs;cout<<"Enter your weight in pounds: ";cin>>lbs;int stone=lbs/Lbs_per_stn;int pounds=lbs%Lbs_per_stn;cout<<lbs<<" pounds are "<<stone<<" stone, "<<pounds<<" pound(s).\n"; }13：#include<iostream>using namespace std;void main(){cout.setf(ios_base::fixed,ios_base::floatfield);float tree=3;int guess(3.9832);int debt=7.2E12;cout<<"tree = "<<tree<<endl;cout<<"guess = "<<guess<<endl;cout<<"debt = "<<debt<<endl;}14：#include<iostream>using namespace std;void main(){int auks,bats,coots;auks=19.99+11.99;bats=(int)19.99+(int)11.99;coots=int (19.99)+int (11.99);cout<<"auks = "<<auks<<",bats = "<<bats;cout<<",coots = "<<coots<<endl;char ch='Z';cout<<"The code for"<<ch<<" is ";cout<<int (ch)<<endl;cout<<"Yes,the code is ";//cout<<statiic_cast<int>(ch)<<endl;}第四章1：#include<iostream>using namespace std;void main(){int yams[3];yams[0]=7;yams[1]=8;yams[2]=6;int yamcosts[3]={20,30,5};cout<<"Total yams = ";cout<<yams[0]+yams[1]+yams[2]<<endl;cout<<"The package with "<<yams[1]<<" yams costs ";cout<<yamcosts[1]<<" cents per yam.\n";int total=yams[0]*yamcosts[0]+yams[1]*yamcosts[1];total=total+yams[2]*yamcosts[2];cout<<"The total yam expense is "<<total<<" cents.\n";cout<<"\nSize of yams array = "<<sizeof yams;cout<<" bytes.\n";cout<<"Size of one element = "<<sizeof yams[0];cout<<" bytes.\n";}2：#include<iostream>using namespace std;void main(){const int size=15;char name1[size];char name2[size]="C++owboy";cout<<"Howdy! I'm "<<name2;cout<<"! what's your name?\n";cin>>name1;cout<<"Well, "<<name1<<",your name has ";cout<<strlen(name1)<<" letters and is stored\n";cout<<" in an array of "<<sizeof name1<<" bytes.\n";cout<<"Your initial is "<<name1[0]<<".\n";name2[3]='\0';cout<<"Here are the first 3 charchters of my name: ";cout<<name2<<endl;}3：#include<iostream>using namespace std;void main(){const int arsize=20;char name[arsize];char dessert[arsize];cout<<"Enter your name:\n";cin>>name;cout<<"Enter your favorite dessert:\n";cin>>dessert;cout<<"I have some delicious "<<dessert;cout<<" for you, "<<name<<".\n";}4：#include<iostream>using namespace std;void main(){const int arsize=20;char name[arsize];char dessert[arsize];cout<<"Enter your name:\n";cin.getline(name,arsize);cout<<"Enter your favorite dessert:\n";cin.getline(dessert,arsize);cout<<"I have some delicious "<<dessert;cout<<" for you, "<<name<<".\n";}5：#include<iostream>using namespace std;void main(){const int arsize=20;char name[arsize];char dessert[arsize];cout<<"Enter your name:\n";cin.get(name,arsize).get();cout<<"Enter your favorite dessert:\n";cin.get(dessert,arsize);cout<<"I have some delicious "<<dessert;cout<<" for you, "<<name<<".\n";}6：#include<iostream>#include<string>using namespace std;void main(){char charr1[20];char charr2[20]="jaguar";string str1;string str2="panther";cout<<"Enter a kind of feline: ";cin>>charr1;cout<<"Enter another kind of feline: ";cin>>str1;cout<<"Here are some felines:\n";cout<<charr1<<" "<<charr2<<" "<<str1<<" "<<str2<<endl;cout<<"The third letter in "<<charr2<<" is "<<charr2[2]<<endl;cout<<"The third letter in "<<str2<<" is "<<str2[2]<<endl;}7：#include<iostream>#include<string>using namespace std;void main(){string s1="penguin";string s2,s3;cout<<"You can assign one string object to another:s2=s1\n";s2=s1;cout<<"s1: "<<s1<<",s2: "<<s2<<endl;cout<<"You can assign a c-style string to a string object.\n";cout<<"s2= \"buzzard\"\n";s2="buzzard";cout<<"s2: "<<s2<<endl;cout<<"You can concatenate strings: s3=s1+s2\n";s3=s1+s2;cout<<"s3: "<<s3<<endl;cout<<"You can append strings.\n";s1+=s2;cout<<"s1+=s2 yields s1= "<<s1<<endl;s2+=" for a day";cout<<"s1+=\" for a day\" yields s2 = "<<s2<<endl;}8：#include<iostream>#include<string>#include<cstring>using namespace std;void main(){char charr1[20];char charr2[20]="jaguar";string str1;string str2="panther";str1=str2;strcpy(charr1,charr2);str1+=" paste";strcat(charr1," juice");int len1=str1.size();int len2=strlen(charr1);cout<<"The string "<<str1<<" contains "<<len1<<" characters.\n";cout<<"The string "<<charr1<<" contains "<<len2<<" characters.\n";}9：#include<iostream>#include<string>#include<cstring>using namespace std;void main(){char charr[20];string str;cout<<"Length of string in charr before input: "<<strlen(charr)<<endl;cout<<"Length of string in str before input: "<<str.size()<<endl;cout<<"Enter a line of text:\n";cin.getline(charr,20);cout<<"You entered: "<<charr<<endl;cout<<"Enter another line of text:\n";getline(cin,str);//将cin用作参数，到str查找输入，会自动调整大小cout<<"You entered: "<<str<<endl;cout<<"Length of string in charr after input: "<<strlen(charr)<<endl;cout<<"Length of string in str before input: "<<str.size()<<endl;}10：#include<iostream>struct inflatable{char name[20];float volume;double price;};int main(){using namespace std;inflatable guest={"Glorious Gloria",1.88,29.99};inflatable pal={"Audacious Arthur",3.12,32.99};cout<<"Expand your guest list with "<<;cout<<" and "<<<<"!\n";cout<<"You can have both for $";cout<<guest.price+pal.price<<"!\n";cout<<guest.volume+pal.volume<<endl;return 0;}11：#include<iostream>using namespace std;struct inflatable{char name[20];float volume;double price;};int main(){inflatable bouquet={"sunflowers",0.20,12.49};inflatable choice;cout<<"bouquet: "<<<<" for $";cout<<bouquet.price<<endl;choice=bouquet;cout<<"choice: "<<<<" for $";cout<<choice.price<<endl;return 0;}12：#include<iostream>using namespace std;struct inflatable{char name[20];float volume;double price;};int main(){inflatable guests[2]={{ "Bambi",0.5,21.99 },{ "Godzilla",2000,565.99 }};cout<<"The guests "<<guests[0].name<<" and "<<guests[1].name <<"\nhave a combined volume of "<<guests[0].volume+guests[1].volume<<" cubic feet.\n";return 0;}13：#include<iostream>using namespace std;int main(){int donuts=6;double cups=4.5;cout<<"donuts valus = "<<donuts;cout<<" and donuts address = "<<&donuts<<endl;cout<<"cups value = "<<cups;cout<<" and cups addres = "<<&cups<<endl;}14：#include<iostream>using namespace std;int main(){int updates=6;int *p_updates;p_updates=&updates;cout<<"Value:updates = "<<updates;cout<<",*p_updates = "<<*p_updates<<endl;cout<<"Address: &update = "<<&updates;cout<<",p_updates = "<<p_updates<<endl;*p_updates=*p_updates+1;cout<<"Now updates = "<<updates<<endl;return 0;}15：#include<iostream>#include<cstring>using namespace std;char *getname(void);int main()char *name;name=getname();cout<<name<<" at "<<(int *)name<<endl;delete []name;name=getname();cout<<name<<" at "<<(int *)name<<endl;delete []name;return 0;}char *getname(){char temp[80];cout<<"Enter last name: ";cin>>temp;char *pn=new char[strlen(temp)+1];strcpy(pn,temp);return pn;}16：#include<iostream>using namespace std;int main(){double wages[3]={ 10000.0,20000.0,30000.0 };short stacks[3]={ 3,2,1 };double *pw=wages;short *ps=&stacks[0];cout<<"pw= "<<pw<<",*pw= "<<*pw<<endl;pw=pw+1;cout<<"add 1 to the pw pointer:\n";cout<<"pw= "<<pw<<",*pw= "<<*pw<<"\n\n";cout<<"ps= "<<ps<<",*ps= "<<*ps<<"\n\n";ps=ps+1;cout<<"add 1 to the ps pointer:\n";cout<<"ps= "<<ps<<",*ps= "<<*ps<<"\n\n";cout<<"access two elements with array notation\n";cout<<"stacks[0]= "<<stacks[0]<<",stacks[1]= "<<stacks[1]<<endl;cout<<"access two elements with pointer notation\n";cout<<"*stacks= "<<*stacks<<",*(stacks+1)= "<<*(stacks+1)<<endl;cout<<sizeof wages<<" =size of wages array\n";cout<<sizeof pw<<" =size of pw pointer\n";return 0;}17：//指针和数组的真正区别#include<iostream>using namespace std;int main(){double *p3=new double[3];p3[0]=0.2;p3[1]=0.5;p3[2]=0.8;cout<<"p3[1] is "<<p3[1]<<".\n";p3=p3+1;cout<<"Now p3[0] is "<<p3[0]<<" and ";cout<<"p3[1] is "<<p3[1]<<".\n";p3=p3-1;cout<<"Now p3[0] is "<<p3[0]<<" and ";cout<<"p3[1] is "<<p3[1]<<".\n";delete [] p3;return 0;}18：#include<iostream>#include<cstring>using namespace std;struct inflatable{char name[20];float volume;double price;};int main()inflatable *ps=new inflatable;cout<<"Enter name of inflatable item: ";cin.get(ps->name,20);cout<<"Enter volume of cubic feet: ";cin>>(*ps).volume;cout<<"Enter price: $";cin>>ps->price;cout<<"Name: "<<(*ps).name<<endl;cout<<"V olume: "<<ps->volume<<" cubic feet\n";cout<<"Price: $"<<ps->price<<endl;delete ps;return 0;}19：#include<iostream>#include<cstring>#include<vector>using namespace std;int main()double a1[4]={ 1.2,2.4,3.6,4.8 };vector<double> a2(4);a2[0]=1.0/3.0;a2[1]=1.0/5.0;a2[2]=1.0/7.0;a2[3]=1.0/9.0;cout<<"a1[2]: "<<a1[2]<<" at "<<&a1[2]<<endl;cout<<"a2[2]: "<<a2[2]<<" at "<<&a2[2]<<endl;a1[-2]=20.2;cout<<"a1[-2]: "<<a1[-2]<<" at "<<&a1[-2]<<endl;return 0;}20：#include<iostream>#include<cstring>using namespace std;int main(){char animal[20]="bear";const char *bird="wren";char *ps;cout<<animal<<" and ";cout<<bird<<"\n";cout<<"Enter a kind of animal: ";cin>>animal;ps=animal;cout<<ps<<"!\n";cout<<"Before using strcpy():\n";cout<<animal<<" at "<<(int *)animal<<endl;cout<<ps<<" at "<<(int *)ps<<endl;ps=new char[strlen(animal+1)];strcpy(ps,animal);cout<<"After using strcpy():\n";cout<<animal<<" at "<<(int *)animal<<endl;cout<<ps<<" at "<<(int *)ps<<endl;delete [] ps;return 0;}21：#include<iostream>using namespace std;int main(){int higgens=5;int *pt=&higgens;cout<<"Value of higgens = "<<higgens<<";Address of higgens = "<<&higgens<<endl;cout<<"Value of *pt = "<<*pt<<";Address of pt = "<<pt<<endl;return 0;}22：#include<iostream>using namespace std;int main(){int nights=1001;int *pt=new int;*pt=1001;cout<<"nights value = ";cout<<nights<<": location "<<&nights<<endl;cout<<"int ";cout<<"value = "<<*pt<<": location = "<<pt<<endl;double *pd=new double;*pd=10000001.0;cout<<"double ";cout<<"value = "<<*pd<<": location = "<<pd<<endl;cout<<"location of pointer pd: "<<&pd<<endl;cout<<"size of pt = "<<sizeof pt;cout<<":size of *pt = "<<sizeof *pt<<endl;cout<<"size of pd = "<<sizeof pd;cout<<":size of *pd = "<<sizeof *pd<<endl;return 0;}23：#include<iostream>#include<cstring>using namespace std;struct antarctica_years_end{int year;};int main(){antarctica_years_end s01,s02,s03;s01.year=1998;antarctica_years_end *pa=&s02;pa->year=1999;antarctica_years_end trio[3];trio[0].year=2003;cout<<trio->year<<endl;const antarctica_years_end *arp[3]={ &s01,&s02,&s03 };cout<<arp[1]->year<<endl;const antarctica_years_end **ppa=arp;//auto ppb=arp;cout<<(*ppa)->year<<endl;//cout<<(*(ppb+1))->year<<endl;return 0; }。

C++ Primer Plus 勘误(第六版)

删分号加冒号变小写变小写拼写错加* 地址错加d
所有权转让给 pu3 后就会被销毁。变量错 -改_ 改小写改小写删掉 p 加叹号加分号
W 为 0 表明，默认的字段宽度为 0。 w 为 0 表明，默认的字段宽度为 0。改小写拼写错 out 改为 in out 改为 in 改小写
P511 / F5 P536 / 图 14.1 / B5 P536 / B2 P536 / B1 P622 / F8 P667 / 16.2 / F7 P668 / 图 16.2-demo2-#2 / B2 P669 / 16.2.1 / B2 P673 / 16.2.3 / F14 P692 / 16.4.4-2 / F3 P708 / F10 P708 / F12 P721 / B7 P738 / 图 17.4-最下面的图 P741 / 17.2.3 / B2 P744 / B1 P762 / B12 P755 / 表 17.8 / F5 P755 / 表 17.8 / F6 P782 / B9
Fn：正数第 n 行，Bn：倒数第 n 行
4
修改为程序清单 2.2 carrots.cpp int、unsigned int、long、… unsigned int 转义序列\n 表示换行符 8.33E-4 表示 8.33/10 9.11e-31 kg 表示… d.dddE-n 指的是… perks 类型的变量—perks mr_blug; 程序需要 strlen(temp)+1 个字符则 strcmp()将返回一个正数值声明为 unsigned int 类型 rodents address = 0x0065fd44 我们使用 “ coordin.h ” 而不是， <coordin.h>。 Embarcadero C++ Builder 从而跳到#endif 后面的一行上 int *pin = new int {6}; cout << bozetta.Retort(); #define STOCK10_H_ Bozo fufu{“Fufu”, “O’Dweeb”}; // C++11 编译器将用 12 来替换它随便说一句，程序清单 12.1… Klunk() { klunk_ct = 0; } 则 operator<()函数返回 true。使用标准的 strcmp()函数 delete [] c_pointer; Show (&player1); Show (&rplayer1); void Move(int nx, int ny) { x = nx; y = ny; } void Move(int nx, int ny) { x = nx; y = ny; } void Move(int nx, int ny) { x = nx; y = ny; } 派生出 Ellipse 类和 Circle 类

C++Primer Plus(第6版)中文版编程练习答案--第六章

5
cout<<"请输入捐款者数目："<<endl; cin>>n_of_donation; donation* list=new donation[n_of_donation]; //创建动态分配的结构数组
for(int i=0;i<n_of_donation;i++) //输入捐款者的信息 { cout<<"输入第"<<i+1<<"位捐款者的信息："<<endl; cout<<"名字："; cin.sync(); getline(cin,list[i].name); cout<<"数目："; cin>>list[i].money; } int temp=0; //记录有没有人的捐款大于一万元 cout<<"重要捐款人："<<endl; for(int i=0;i<n_of_donation;i++) { if(list[i].money>10000) { cout<<list[i].name<<" "<<list[i].money<<endl; temp++; } } if(temp==0) cout<<"此项目没有人。"<<endl; temp=0; cout<<"捐款人："<<endl; for(int i=0;i<n_of_donation;i++) { if(list[i].money<=10000) { cout<<list[i].name<<" "<<list[i].money<<endl; temp++; } } if(temp==0) cout<<"此项目没有人。"<<endl; delete list; getchar(); getchar(); return 0; }

C Primer Plus (第六版)中文版 4.8编程练习

4.8编程练习//*********************一****************************#include<stdio.h>int main(void){char name[10] ;//名char name2[10];//姓printf("请输入名和姓:\n");scanf("%s %s",name,name2);printf("%s,%s",name,name2);return 0;}//*********************二****************************#include<stdio.h>int main(void){char name[]="tghsjxijkm";printf("\"%s\"\n", name);//打印名字，包括双引号printf("\"%20s\"\n", name);//在宽度为20的字段右端打印名字，包括双引号printf("\"%-20s\"\n", name);//在宽度为20的字段左端打印名字，包括双引号printf("%13s\n", name);//在比姓名宽度宽3的字段中打印名字return 0;}//*********************三****************************#include<stdio.h>int main(void){float number;printf("请输入一个浮点数number=");scanf_s("%f", &number);printf("the input is %.1f or %.1e\n",number,number);printf("the input is %+.3f or %.3E\n",number,number);return 0;}//*********************四****************************#include<stdio.h>int main(void){float tall;//身高char name[30];//姓名printf("请输入您的身高和姓名\n");scanf("%f", &tall);scanf("%s", name);printf("%s,you are %.1f feet tall\n", name, tall);return 0;}//*********************五****************************#include<stdio.h>int main(){float v=0;//下载速度单位是兆位每秒float t=0;//下载时间float doc = 0;//文件大小单位是兆字节一个字节=8位printf("输入下载速度(Mb/s)\n");scanf("%f", &v);printf("输入文件大小(MB)\n");scanf("%f", &doc);t = 8*doc / v;//1(B)byte=8(b)bitsprintf("At %.2f megabits per second,a file of %.2f megabytes\n", v,doc);printf("downloads in %.2f seconds.\n", t);return 0;}//*********************六****************************#include<stdio.h>int main(void){char ming[20];char xing[20];int i=0,j=0;//循环int tempi, tempj;//存储姓和名最后一个字母的下标printf("请输入名字\n");scanf("%s", ming);for (; i < 20; i++){if (ming[i] == '\0')tempi=i;break;}}printf("请输入姓氏\n");scanf("%s", xing);for (; j < 20; j++){if (xing[j] == '\0'){tempj = j;break;}}printf("%7s %7s\n", ming, xing);printf("%7d %7d\n", tempi, tempj);printf("%7s %7s\n", ming, xing);printf("%-7d %-7d\n", tempi, tempj);return 0;}//*********************七****************************#include<stdio.h>#include<float.h>//浮点型限制int main(void){double number_1= 1.0 / 3.0;float number_2 = 1.0 / 3.0;printf("%-18.6lf %-18.6f\n", number_1, number_2);printf("%-18.12lf %-18.12f\n", number_1, number_2);printf("%-18.16lf %-18.16f\n", number_1, number_2);printf("%d %d\n", DBL_DIG, FLT_DIG); //输出结果为15 6 表示double能保证的有效位数最多是15~16位，完全能保证的是15位；float是6~7位，完全能保证的是6位。

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