学生选修课管理系统 C++课程设计.doc

#include #include#include#include #include /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: friend void sselect(); friend void supdate(); friend void sdelet(); friend void saccount(); friend void sdisplay(); friend istream & operator (istream & in,student &stu) instu.snostu.snamestu.sexstu.agestu.departstu.classnostu.lianx; return in; friend ostream & operator ( ostream & out,student &stu) outstu.sno stu.sname stu.sex stu.age stu.depart stu.classno stu.lianxendl; 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s; ifstream in(e:studentfile.txt); if(!in) cout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: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：*endl; cout* 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：*sn; while(sn5|sn1) cout选择的数据无效，请重新输入：sn; coutendl; 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no; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() if(no=stu.sno) coutstuendl; 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name; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() if(strcpy(name,stu.sname)=0) coutstuendl; flag=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dep; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() if(strcmp(dep,stu.depart)=0) coutstuendl; flag=1; in.read(char*)&stu,sizeof(student); break; case 4: char clno20; cout请输入要查询的学生的班级clno; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() if(strcmp(clno,stu.classno)=0) coutstuendl; flag=1; 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！ 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：*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：*sn; while(sn5|sn1) cout选择的数据无效，请重新输入：sn; coutendl; 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) coutstuendl; 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！ endl; system(pause); void sdelet() while(1) system(cls); cout*请选择按下列类别查询后删除：*endl; cout* 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：*sn; while(sn5|sn1) cout选择的数据无效，请重新输入：sn; coutendl; 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(!in.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no; for(int i=0;in;i+) if(no=stui.sno) coutstuiendl; cout是否要删除该学生的信息！ch; if( ch=Y|ch=y) for(int j=i;jn;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;kn;k+) out.seekp(k*sizeof(student),ios:beg); 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.read(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打开学生信息文件失败！endl; return ; student stu; in.read(char*)&stu,sizeof(student); while(!in.eof() coutstu (istream & in, course &cou) amecou.cxzcou.zxscou.xfcou.kcxqcou.xxrs; return in; friend ostream & operator (ostream & out,course &cou) o ame cou.cxz cou.zxs cou.xf cou.kcxq cou.xxrsendl; 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c; ifstream in(e:coursefile.txt); if(!in) cout打开课程信息文件失败！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); 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* 返回上一级界面 请按3：*sn; while(sn3|sn1) cout选择的数据无效，请重新输入：sn; coutendl; 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) case 1: int no; cout请输入要查询的课程的编号no; course ke; in.read(char*)&ke,sizeof(course); while(!in.eof() if(no=o) coutkeendl; flag=1; in.read(char*)&ke,sizeof(course); /if(no=ke. char*)&ke,sizeof(course); break; case 2: char name25; cout请输入要查询的课程的名称name; course ke; in.read(char*)&ke,sizeof(course); while(!in.eof() if(strcpy(name,ame)=0) coutkeendl; 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：*endl; cout* 按课程学分 请按4：*endl; cout* 返回上一级界面 请按5：*sn; while(sn5|sn1) cout选择的数据无效，请重新输入：sn; coutendl; fstream in(e:studentfile.txt,ios:in|ios:out); 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) coutkendl; cout请输入要修改的课程的编号，名称，性质，学分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no; student stu; int i=0; in.seekg(i*sizeof(student),ios:beg); in.read(char*)&stu,sizeof(student); while(!in.eof() if(no=s