学生选修课管理系统-C++课程设计

1、#include<iostream.h> #include<string.h>#include<fstream.h>#include <stdlib.h>#include <time.h>/using namespace std;const int count =3;class situaction;class student public: int sno; char sname20; char sex3; int age; char depart20; char classno20; char lianx40; /public:

2、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>>

3、stu.lianx; return in; friend ostream & operator<< ( ostream & out,student &stu) out<<stu.sno<<" "<<stu.sname<<" "<<stu.sex<<" "<<stu.age<<" "<<stu.depart<<" "<<stu.cl

4、assno<<" "<<stu.lianx<<endl; 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、联系方式"<<endl; cin>>s; ifstream in("e:studentfile.txt"); if(!in) cout<<

5、;"打开学生信息文件失败！"<<endl; 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许添加！" <<endl; else ofstream out("e:stud

6、entfile.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：*"<<endl; cout<<"* 按学生学号 请按1：* "<<endl; cout<<"* 按学生姓名 请按2：*&quo

7、t;<<endl; cout<<"* 按学生系别 请按3：*"<<endl; cout<<"* 按学生班级 请按4：*"<<endl; cout<<"* 返回上一级界面 请按5：*"<<endl; int sn; cin>>sn; while(sn>5|sn<1) cout<<"选择的数据无效，请重新输入："<<endl; cin>>sn; cout<<endl

8、; ifstream in("e:studentfile.txt"); if(!in) cout<<"打开学生信息文件失败！"<<endl; return ; int flag=0; switch(sn) case 1: int no; cout<<"请输入要查询的学生的学号"<<endl; cin>>no; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() if(no=stu.sno)

9、cout<<stu<<endl; flag=1; in.read(char*)&stu,sizeof(student); break; case 2: char name20; cout<<"请输入要查询的学生的姓名"<<endl; cin>>name; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() if(strcpy(name,stu.sname)=0) cout<<stu<<endl; f

10、lag=1; in.read(char*)&stu,sizeof(student); break; case 3: char dep20; cout<<"请输入要查询的学生的系别"<<endl; cin>>dep; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() if(strcmp(dep,stu.depart)=0) cout<<stu<<endl; flag=1; in.read(char*)&stu,si

11、zeof(student); break; case 4: char clno20; cout<<"请输入要查询的学生的班级"<<endl; cin>>clno; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() if(strcmp(clno,stu.classno)=0) cout<<stu<<endl; flag=1; in.read(char*)&stu,sizeof(student); break; case 5

12、: return ; in.close(); if(flag=0) cout<<"要查询的学生在文件不存在！" <<endl; system("pause"); void supdate() while(1) system("cls"); cout<<"*请选择按下列类别查询后修改：*"<<endl; cout<<"* 按学生学号 请按1：* "<<endl; cout<<"* 按学生姓名 请按2：*&

13、quot;<<endl; cout<<"* 按学生系别 请按3：*"<<endl; cout<<"* 按学生班级 请按4：*"<<endl; cout<<"* 返回上一级界面 请按5：*"<<endl; int sn; cin>>sn; while(sn>5|sn<1) cout<<"选择的数据无效，请重新输入："<<endl; cin>>sn; cout<<e

14、ndl; fstream in("e:studentfile.txt",ios:in|ios:out); if(!in) cout<<"打开学生信息文件失败！"<<endl; return ; int flag=0; switch(sn) case 1: int no; cout<<"请输入要查询的学生的学号"<<endl; cin>>no; student stu; int i=0; in.seekg(i*sizeof(student),ios:beg); in.read(

15、char*)&stu,sizeof(student); while(!in.eof() if(no=stu.sno) cout<<stu<<endl; cout<<"请输入要修改的学生的学号、姓名、性别、年龄、系别、班级、联系方式"<<endl; cin>>stu; in.seekp(i*sizeof(student),ios:beg); in.write(char*)&stu,sizeof(student); flag=1; i+; in.seekg(i*sizeof(student),ios:b

16、eg); 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！" <<endl; system("pause"); void sdelet() while(1) system("cls"); cout<<"*请选择按下列类别查询后删除：*"<<endl; cou

17、t<<"* 按学生学号 请按1：* "<<endl; cout<<"* 按学生姓名 请按2：*"<<endl; cout<<"* 按学生系别 请按3：*"<<endl; cout<<"* 按学生班级 请按4：*"<<endl; cout<<"* 返回上一级界面 请按5：*"<<endl; int sn; cin>>sn; while(sn>5|sn<1)

18、 cout<<"选择的数据无效，请重新输入："<<endl; cin>>sn; cout<<endl; student stu20; 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！"<<endl; return ; int n=0; in.read(char*)&stun,sizeof(student); while(!i

19、n.eof() n+; in.read(char*)&stun,sizeof(student); in.close(); int no; cout<<"请输入要删除的学生的学号"<<endl; cin>>no; for(int i=0;i<n;i+) if(no=stui.sno) cout<<stui<<endl; cout<<"是否要删除该学生的信息！"<<endl; char ch; cin>>ch; if( ch='Y'|

20、ch='y') for(int j=i;j<n;j+) stuj=stuj+1; n-; flag=1; if(flag=0) cout<<"要修改的学生在文件不存在！" <<endl; else ofstream out("e:studentfile.txt"); if(!out) cout<<"打开学生信息文件失败！"<<endl; return ; for(int k=0;k<n;k+) out.seekp(k*sizeof(student),ios:b

21、eg); out.write(char*)&stuk,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.re

22、ad(char*)&s,sizeof(student); while(!ifs.eof() i+; ifs.read(char*)&s,sizeof(student); ifs.close(); cout<<"学生："<<i<<"人"<<endl; ifs.close(); system("pause"); void sdisplay() ifstream in("e:studentfile.txt",ios:in); if(!in) cout<

23、<"打开学生信息文件失败！"<<endl; return ; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() cout<<stu<<endl; in.read(char*)&stu,sizeof(student); in.close(); system("pause"); class course public:int cno; char cname20; char cxz10; int zxs; int xf; c

24、har kcxq10; 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>>o>>ame>>cou.cxz>>cou.zxs>&g

25、t;cou.xf>>cou.kcxq>>cou.xxrs; return in; friend ostream & operator <<(ostream & out,course &cou) out<<o<<" "<<ame<<" "<<cou.cxz<<" "<<cou.zxs<<" "<<cou.xf<<" "&

26、lt;<cou.kcxq<<" "<<cou.xxrs<<endl; 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"<<endl; cin>>c; ifstream in("e:coursefile.txt"); if(!in) cout<<"打开课程信

27、息文件失败！"<<endl; return ; course cou; in.read(char*)&cou,sizeof(course); while(!in.eof() if(o=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许添加！" <<endl; else ofstream out("e:coursefile.txt",ios:app

28、); 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：*"<<endl; cout<<"* 按课程编号 请按1：* "<<endl; cout<<"* 按课程名称 请按2：*"<<endl; cout<<&quo

29、t;* 返回上一级界面 请按3：*"<<endl; int sn; cin>>sn; while(sn>3|sn<1) cout<<"选择的数据无效，请重新输入："<<endl; cin>>sn; cout<<endl; ifstream in("e:coursefile.txt"); if(!in) cout<<"打开课程信息文件失败！"<<endl; return ; int flag=0; switch(sn)

30、case 1: int no; cout<<"请输入要查询的课程的编号"<<endl; cin>>no; course ke; in.read(char*)&ke,sizeof(course); while(!in.eof() if(no=o) cout<<ke<<endl; flag=1; in.read(char*)&ke,sizeof(course); /if(no=ke. char*)&ke,sizeof(course); break; case 2: char name25; co

31、ut<<"请输入要查询的课程的名称"<<endl; cin>>name; course ke; in.read(char*)&ke,sizeof(course); while(!in.eof() if(strcpy(name,ame)=0) cout<<ke<<endl; flag=1; in.read(char*)&ke,sizeof(course); break; case 3: return ; in.close(); if(flag=0) cout<<"要查询的课程在文

32、件不存在！" <<endl; system("pause");void cupdate() while(1) system("cls"); cout<<"*请选择按下列类别查询后修改：*"<<endl; cout<<"* 按课程编号 请按1：* "<<endl; cout<<"* 按课程名称 请按2：*"<<endl; cout<<"* 按课程性质 请按3：*"<&

33、lt;endl; cout<<"* 按课程学分 请按4：*"<<endl; cout<<"* 返回上一级界面 请按5：*"<<endl; int sn; cin>>sn; while(sn>5|sn<1) cout<<"选择的数据无效，请重新输入："<<endl; cin>>sn; cout<<endl; fstream in("e:studentfile.txt",ios:in|ios:out)

34、; if(!in) cout<<"打开课程信息文件失败！"<<endl; return ; int flag=0; switch(sn) case 1: int no; cout<<"请输入要查询的课程的编号"<<endl; 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=o) cout<<

35、;k<<endl; cout<<"请输入要修改的课程的编号，名称，性质，学分"<<endl; 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"<<endl; cin>>no; student stu; int i=0; in.seekg(i*sizeof(student),ios:beg); in.read(char*)&stu,sizeof(student); whi