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;