学生选修课管理系统C++课程设计

#include

#include

#include

#include

#include

//using namespace std;

const int count =3;

class situaction;

class student

{ public:

int sno;

char sname[20];

char sex[3];

int age;

char depart[20];

char classno[20];

char lianx[40];

//public:

friend void sselect();

friend void supdate();

friend void sdelet();

friend void saccount();

friend void sdisplay();

friend istream & operator >> (istream & in,student &stu)

{

in>>stu.sno>>stu.sname>>stu.sex>>stu.age>>stu.depart>>stu.classno>>stu.lianx;

return in;

}

friend ostream & operator<< ( ostream & out,student &stu)

{

out<

return out;

}

friend void xkadd();

friend void sadd();

};

void sadd()

{ while(1)

{

int flag1=0;

student s;

cout<<"请输入要添加的学生的学号、姓名、性别、年龄、系别、班级、联系式"<

cin>>s;

ifstream in("e:\\studentfile.txt");

if(!in)

{

cout<<"打开学生信息文件失败！"<

return ;

}

student stu;

in.read((char*)&stu,sizeof(student));

while(!in.eof())

{ if(s.sno==stu.sno) {flag1=1; break;}

in.read((char*)&stu,sizeof(student));

}

in.close();

if(flag1==1) cout<<"该学生已经在文件中存在不允添加！" <

else

{ ofstream out("e:\\studentfile.txt",ios::app);

out.write((char*)&s,sizeof(student));

out.close();

}

system("pause");

break;

}

}

void sselect()

{ while(1)

{ system("cls");

cout<<"***********请选择要查询的类别：*************"<

cout<<"*********** 按学生学号请按1：************* "<

cout<<"*********** 按学生姓名请按2：*************"<

cout<<"*********** 按学生系别请按3：*************"<

cout<<"*********** 按学生班级请按4：*************"<

cout<<"*********** 返回上一级界面请按5：*************"<

int sn;

cin>>sn;

while(sn>5||sn<1)

{

cout<<"选择的数据无效，请重新输入："<

cin>>sn;

}

cout<

ifstream in("e:\\studentfile.txt");

if(!in)

{ cout<<"打开学生信息文件失败！"<

return ;

}

int flag=0;

switch(sn)

{

case 1: {

int no;

cout<<"请输入要查询的学生的学号"<

cin>>no;

student stu;

in.read((char*)&stu,sizeof(student));

while(!in.eof())

{ if(no==stu.sno) {cout<

in.read((char*)&stu,sizeof(student));

}

break;

}

case 2: {

char name[20];

cout<<"请输入要查询的学生的姓名"<

cin>>name;

student stu;

in.read((char*)&stu,sizeof(student));

while(!in.eof())

{ if(strcpy(name,stu.sname)==0) {cout<

in.read((char*)&stu,sizeof(student));

}

break;

}

case 3: {

char dep[20];

cout<<"请输入要查询的学生的系别"<

cin>>dep;

student stu;

in.read((char*)&stu,sizeof(student));

while(!in.eof())

{ if(strcmp(dep,stu.depart)==0) {cout<

in.read((char*)&stu,sizeof(student));

}

break;

}

case 4: {

char clno[20];

cout<<"请输入要查询的学生的班级"<

cin>>clno;

student stu;

in.read((char*)&stu,sizeof(student));

while(!in.eof())

{ if(strcmp(clno,stu.classno)==0) {cout<

in.read((char*)&stu,sizeof(student));

}

break;

}

case 5: return ;

}

in.close();

if(flag==0) cout<<"要查询的学生在文件不存在！" <

system("pause");

}

}

void supdate()

{ while(1)

{ system("cls");

cout<<"***********请选择按下列类别查询后修改：*************"<

cout<<"*********** 按学生学号请按1：************* "<

cout<<"*********** 按学生姓名请按2：*************"<

cout<<"*********** 按学生系别请按3：*************"<

cout<<"*********** 按学生班级请按4：*************"<

cout<<"*********** 返回上一级界面请按5：*************"<

int sn;

cin>>sn;

while(sn>5||sn<1)

{

cout<<"选择的数据无效，请重新输入："<

cin>>sn;

}

cout<

fstream in("e:\\studentfile.txt",ios::in|ios::out);

if(!in)

{ cout<<"打开学生信息文件失败！"<

return ;

}

int flag=0;

switch(sn)

{

case 1: {

int no;

cout<<"请输入要查询的学生的学号"<

cin>>no;

student stu;

int i=0;

in.seekg(i*sizeof(student),ios::beg);

in.read((char*)&stu,sizeof(student));

while(!in.eof())

{ if(no==stu.sno)

{ cout<

cout<<"请输入要修改的学生的学号、姓名、性别、年龄、系别、班级、联系式"<

cin>>stu;

in.seekp(i*sizeof(student),ios::beg);

in.write((char*)&stu,sizeof(student));

flag=1;

}

i++;

in.seekg(i*sizeof(student),ios::beg);

in.read((char*)&stu,sizeof(student));

}

break;

}

case 2:

case 3:

case 4:

case 5: return ;

}

in.close();

if(flag==0) cout<<"要修改的学生在文件不存在！" <

system("pause");

}

}

void sdelet()

{ while(1)

{ system("cls");

cout<<"***********请选择按下列类别查询后删除：*************"<

cout<<"*********** 按学生学号请按1：************* "<

cout<<"*********** 按学生姓名请按2：*************"<

cout<<"*********** 按学生系别请按3：*************"<

cout<<"*********** 按学生班级请按4：*************"<

cout<<"*********** 返回上一级界面请按5：*************"<

int sn;

cin>>sn;

while(sn>5||sn<1)

{

cout<<"选择的数据无效，请重新输入："<

cin>>sn;

}

cout<

student stu[20];

int flag=0;

switch(sn)

{

case 1: { ifstream in("e:\\studentfile.txt");

if(!in)

{ cout<<"打开学生信息文件失败！"<

return ;

}

int n=0;

in.read((char*)&stu[n],sizeof(student));

while(!in.eof())

{ n++;

in.read((char*)&stu[n],sizeof(student));

}

in.close();

int no;

cout<<"请输入要删除的学生的学号"<

cin>>no;

for(int i=0;i

{ if(no==stu[i].sno)

{ cout<

cout<<"是否要删除该学生的信息！"<

char ch;

cin>>ch;

if( ch='Y'||ch=='y')

{

for(int j=i;j

stu[j]=stu[j+1];

n--;

}

flag=1;

}

}

if(flag==0) cout<<"要修改的学生在文件不存在！" <

else

{

ofstream out("e:\\studentfile.txt");

if(!out)

{ cout<<"打开学生信息文件失败！"<

return ;

}

for(int k=0;k

{ out.seekp(k*sizeof(student),ios::beg);

out.write((char*)&stu[k],sizeof(student));

}

out.close();

}

break;

}

case 2:

case 3:

case 4:

case 5: return ;

}

system("pause");

}

}

void saccount()

{ ifstream ifs("e:\\studentfile.txt");

if(!ifs)

{

cout<<"打开文件失败！";

system("pause");

return ;

}

int i=0;

student s;

ifs.read((char*)&s,sizeof(student));

while(!ifs.eof())

{

i++;

ifs.read((char*)&s,sizeof(student));

}

ifs.close();

cout<<"学生："<

ifs.close();

system("pause");

}

void sdisplay()

{ ifstream in("e:\\studentfile.txt",ios::in);

if(!in)

{

cout<<"打开学生信息文件失败！"<

return ;

}

student stu;

in.read((char*)&stu,sizeof(student));

while(!in.eof())

{ cout<

in.read((char*)&stu,sizeof(student));

}

in.close();

system("pause");

}

class course

{ public:

int cno;

char cname[20];

char cxz[10];

int zxs;

int xf;

char kcxq[10];

int xxrs;

//public:

friend void cadd();

friend void cselect();

friend void cupdate();

friend void cdelet();

friend void caccount();

friend void cdisplay();

friend istream & operator >> (istream & in, course &cou)

{

in>>https://www.360docs.net/doc/1718963862.html,o>>https://www.360docs.net/doc/1718963862.html,ame>>cou.cxz>>cou.zxs>>cou.xf>>cou.kcxq>>cou.xxrs;

return in;

}

friend ostream & operator <<(ostream & out,course &cou)

{ out<

return out;

}

friend void xkadd();

};

void cadd()

{ int flag1=0;

course c;

cout<<"请输入要添加的课程的课程代码、课程名称、课程性质、总学时、学分、开课学期、选修人数"<

cin>>c;

ifstream in("e:\\coursefile.txt");

if(!in)

{

cout<<"打开课程信息文件失败！"<

return ;

}

course cou;

in.read((char*)&cou,sizeof(course));

while(!in.eof())

{ if(https://www.360docs.net/doc/1718963862.html,o==https://www.360docs.net/doc/1718963862.html,o) {flag1=1; break;}

in.read((char*)&cou,sizeof( course));

}

in.close();

if(flag1==1) cout<<"该课程已经在文件中存在不允添加！" <

{ ofstream out("e:\\coursefile.txt",ios::app);

out.write((char*)&c,sizeof(course));

out.close();

}

system("pause");

}

void cselect()

{while(1)

{ system("cls");

cout<<"*********** 请选择要查询的类别：*************"<

cout<<"*********** 按课程编号请按1：************* "<

cout<<"*********** 按课程名称请按2：*************"<

cout<<"*********** 返回上一级界面请按3：*************"<

int sn;

cin>>sn;

while(sn>3||sn<1)

{

cout<<"选择的数据无效，请重新输入："<

cin>>sn;

}

cout<

ifstream in("e:\\coursefile.txt");

if(!in)

{ cout<<"打开课程信息文件失败！"<

return ;

}

int flag=0;

switch(sn)

{

case 1: {

int no;

cout<<"请输入要查询的课程的编号"<

cin>>no;

course ke;

in.read((char*)&ke,sizeof(course));

while(!in.eof())

{ if(no==https://www.360docs.net/doc/1718963862.html,o) {cout<

//if(no==ke. char*)&ke,sizeof(course));

}

break;

}

case 2: {

char name[25];

cout<<"请输入要查询的课程的名称"<

cin>>name;

course ke;

in.read((char*)&ke,sizeof(course));

while(!in.eof())

{ if(strcpy(name,https://www.360docs.net/doc/1718963862.html,ame)==0) {cout<

in.read((char*)&ke,sizeof(course));

}

break;

}

case 3: return ;

}

in.close();

if(flag==0) cout<<"要查询的课程在文件不存在！" <

system("pause");

}

}

void cupdate()

{ while(1)

{ system("cls");

cout<<"***********请选择按下列类别查询后修改：*************"<

cout<<"*********** 按课程编号请按1：************* "<

cout<<"*********** 按课程性质请按3：*************"<

cout<<"*********** 按课程学分请按4：*************"<

cout<<"*********** 返回上一级界面请按5：*************"<

int sn;

cin>>sn;

while(sn>5||sn<1)

{

cout<<"选择的数据无效，请重新输入："<

cin>>sn;

}

cout<

fstream in("e:\\studentfile.txt",ios::in|ios::out);

if(!in)

{ cout<<"打开课程信息文件失败！"<

return ;

}

int flag=0;

switch(sn)

{

case 1: {

int no;

cout<<"请输入要查询的课程的编号"<

cin>>no;

course k;

int i=0;

in.seekg(i*sizeof(course),ios::beg);

in.read((char*)&k,sizeof(course));

while(!in.eof())

{ if(no==https://www.360docs.net/doc/1718963862.html,o)

{ cout<

cout<<"请输入要修改的课程的编号，名称，性质，学分"<

cin>>k;

in.seekp(i*sizeof(course),ios::beg);

in.write((char*)&k,sizeof(course));

flag=1;

}

i++;

in.seekg(i*sizeof(course),ios::beg);

in.read((char*)&k,sizeof(course));

}

break;

}

case 2: {

int no;

cout<<"请输入要查询的学生的学号"<

cin>>no;

student stu;

int i=0;

in.seekg(i*sizeof(student),ios::beg);

in.read((char*)&stu,sizeof(student));

while(!in.eof())

{ if(no==stu.sno)

{ cout<

cout<<"请输入要修改的的课程的编号，名称，性质，学分"<

cin>>stu;

in.seekp(i*sizeof(student),ios::beg);