最新C++学生成绩管理系统-源程序

//#include <iostream.h>#include <string.h>#include <process.h>#include<fstream.h>int i=0;class CPerson{public:char IDNO[20];char name[20];char addr[20];char tel[20];};class CStudent:public CPerson {public:char StudNo[20];double Math;double English;double Average;};class CClass{public:char ClassName[20];CStudent *stu[50];CClass(){for(int i=0;i<50;i++)stu[i]=new CStudent();}~CClass(){for(int i=0;i<50;i++)delete stu[i];}void createclass();void printclass();void get();void xiugai();void delect();void print();void write();void read();void chazhao();};void CClass::createclass()//创建班级{cout<<"请输入班级名称：";cin>>ClassName;}void CClass::printclass(){ cout<<"班级名称:"<<ClassName<<"班级人数:"<<i<<endl;cout<<"******************************\n";}void CClass::get()//输入学生信息{int k;cout<<"请输入18位的学生身份证号码:";cin>>stu[i]->IDNO;/* while(strlen(stu[i]->IDNO)!=18){cout<<"请输入18位数:";cin>>stu[i]->IDNO;}*/for( k=0;k<i;k++){while(strcmp(stu[i]->IDNO,stu[k]->IDNO)==0){ cout<<"错误，身份证号码相同，请重新输入";cin>>stu[i]->IDNO;}}cout<<"请输入学生名字:";cin>>stu[i]->name;cout<<"请输入学生地址:";cin>>stu[i]->addr;cout<<"请输入学生电话号码:";cin>>stu[i]->tel;cout<<"请输入学生学号:";cin>>stu[i]->StudNo;for( k=0;k<i;k++){while(strcmp(stu[i]->StudNo,stu[k]->StudNo)==0){ cout<<"错误，学号相同，请重新输入";cin>>stu[i]->StudNo;}}cout<<"请输入学生数学成绩:";cin>>stu[i]->Math;while (stu[i]->Math<0 || stu[i]->Math>100){cout<<"Error data!"<<endl<<endl;cout<<" 请再次输入数学成绩: ";cin>>stu[i]->Math;}cout<<"请输入学生英语成绩:";cin>>stu[i]->English;while (stu[i]->English<0 ||stu[i]->English>100){cout<<"Error data!"<<endl<<endl;cout<<" 请再次输入英语成绩: ";cin>>stu[i]->English;}}void CClass::xiugai() //修改学生信息{int a=1;char x[10];int j;int choice;while(i!=0){ cout<<"请输入您要修改的学生的学号:\n";cin>>x;for(j=0;j<50;j++)if(strcmp(stu[j]->StudNo,x)==0){a=0;cout<<"******************************\n";cout<<" 请选择所要修改的内容: \n";cout<<" 1 - 修改地址\n";cout<<" 2 - 修改电话号码\n";cout<<" 3 - 修改数学成绩\n";cout<<" 4 - 修改英语成绩\n";cout<<" 5 - 返回\n";cout<<"******************************\n";cin>>choice;while(choice>5||choice<0||choice==0){cout<<"请在1～5中选择:";cin>>choice;}switch (choice){case 1:{cout<<"请输入学生新的地址\n";cin>>stu[j]->addr;}break;case 2:{cout<<"请输入学生新的电话号码\n";cin>>stu[j]->tel;}break;case 3:{cout<<"请输入学生新的数学成绩\n";cin>>stu[j]->Math;while (stu[j]->Math<0 || stu[j]->Math>100){cout<<"Error data!"<<endl<<endl;cout<<" 请再次输入数学成绩: ";cin>>stu[j]->Math;}}break;case 4:{cout<<"请输入学生新的英语成绩\n";cin>>stu[j]->English;while (stu[j]->English<0 ||stu[j]->English>100){cout<<"Error data!"<<endl<<endl;cout<<" 请再次输入英语成绩: ";cin>>stu[j]->English;}}break;case 5: break;break;}}for(j=0;j<50;j++)if(strcmp(stu[j]->StudNo,x)!=0&&a==1){ a=0;cout<<"没有你要修改的学号！"<<endl;}break; }}void CClass::print()//输出学生信息{for(int j=0;j<i;j++){cout<<"姓名:"<<stu[j]->name<<" ";cout<<"身份证号码:"<<stu[j]->IDNO <<" " ;cout<<"地址:"<<stu[j]->addr<<" " ;cout<<"电话:"<<stu[j]->tel <<" ";cout<<"学号:"<<stu[j]->StudNo <<" ";cout<<"数学成绩:"<<stu[j]->Math <<" " ;cout<<"英语成绩:"<<stu[j]->English <<" " ;stu[j]->Average=(stu[j]->Math+stu[j]->English)/2 ;cout<<"平均成绩:"<<stu[j]->Average<<endl ;}}void CClass::delect(){char ss[20];cout<<"输入要删除记录的姓名:";cin>>ss;if(i==0){ cout<<"没有记录!"<<endl;cout<<"请先输入记录!";system("pause");return;}for(int k=0;k<i;k++){while(strcmp(stu[k]->name,ss)==0){for(int o=k;o<i;o++){strcpy(stu[o]->IDNO,stu[o+1]->IDNO);strcpy(stu[o]->name,stu[o+1]->name);strcpy(stu[o]->addr,stu[o+1]->addr);strcpy(stu[o]->tel,stu[o+1]->tel);strcpy(stu[o]->StudNo,stu[o+1]->StudNo);stu[o]->Math=stu[o+1]->Math;stu[o]->English=stu[o+1]->English;stu[o]->Average=stu[o+1]->Average;}i--;cout<<"已成功删除该记录!\n";return;}}cout<<"抱歉，没有您要删除的姓名"<<endl;}void CClass::chazhao(){char s[20];int j;int a=1;int choice;while(choice!=0){cout<<"******************************\n";cout<<" 1 - 按姓名查找\n";cout<<" 2 - 按学号查找\n";cout<<" 3 - 返回\n";cout<<"******************************\n";cin>>choice;while(choice>3||choice<0||choice==0){cout<<"请在1～3中选择:";cin>>choice;}switch (choice){case 1:{cout<<"请输入该学生的姓名:";cin>>s;for(j=0;j<i;j++){if(strcmp(stu[j]->name,s)==0&&a==1){ cout<<"姓名:"<<stu[j]->name;cout<<"身份证号码:"<<stu[j]->IDNO;cout<<"地址:"<<stu[j]->addr;cout<<"电话:"<<stu[j]->tel;cout<<"学号:"<<stu[j]->StudNo;cout<<"数学成绩:"<<stu[j]->Math;cout<<"英语成绩:"<<stu[j]->English;cout<<"平均成绩:"<<stu[j]->Average<<endl;a=0;}}for(j=0;j<i;j++){if(strcmp(stu[j]->name,s)!=0&&a==1){ cout<<"抱歉，没有您要找的姓名!"<<endl;a=0; }}}break;case 2:{cout<<"请输入该学生的学号:";cin>>s;for(j=0;j<i;j++){if(strcmp(stu[j]->StudNo,s)==0&&a==1){ cout<<"姓名:"<<stu[j]->name;cout<<"身份证号码:"<<stu[j]->IDNO;cout<<"地址:"<<stu[j]->addr;cout<<"电话:"<<stu[j]->tel;cout<<"学号:"<<stu[j]->StudNo;cout<<"数学成绩:"<<stu[j]->Math;cout<<"英语成绩:"<<stu[j]->English;cout<<"平均成绩:"<<stu[j]->Average<<endl;a=0;}}for(j=0;j<i;j++){if(strcmp(stu[j]->StudNo,s)!=0&&a==1){ cout<<"抱歉，没有您要找的学号!"<<endl;a=0; }}}break;case 3: break;break;}break;}}void CClass::write() //将所有记录写入文件{ system("cls");int j;char filename[20]; //定义文件名cout<<"请输入文件名:";cin>>filename;ofstream fout(filename);if(!fout){cout<<"cann't open file\n";return;}fout<<ClassName<<" "<<i<<endl;for(j=0;j<i;j++){fout<<stu[j]->IDNO<<" "<<stu[j]->name<<" "<<stu[j]->addr<<" "<<stu[j]->tel<<" "<<stu[j]->StudNo<<" "<<stu[j]->Math<<" "<<stu[j]->English<<" "<<stu[j]->Average<<endl;}fout.close(); //关闭文件cout<<"写入文件成功!\n"; // 返回成功信息}void CClass::read() //从文件中读入数据{int j;char filename[20]; //定义文件名cout<<"请输入文件名:";cin>>filename; //输入文件名if(strcmp(filename,"rb")==0){cout<<"没有此文件!"<<endl;}ifstream fin(filename);if(!fin){ cout<<"cann't open file\n"; //打开失败信息cout<<"\t\t\t";}fin>>ClassName>>i;for(j=0;j<i;j++){fin>>stu[j]->IDNO>>stu[j]->name>>stu[j]->addr>>stu[j]->tel>>stu[j]->StudNo>>stu[j]->Math> >stu[j]->English>>stu[j]->Average;}fin.close(); //关闭文件cout<<"读入班级信息成功!\n";}void main(){CClass obj;system("cls");int choice;while( choice!=0){cout<<"***************************************\n";cout<<" 请选择服务\n";cout<<" 1 - 创建班级\n";cout<<" 2 - 添加学生信息\n";cout<<" 3 - 修改学生信息\n";cout<<" 4 - 删除学生信息\n";cout<<" 5 - 打印学生信息\n";cout<<" 6 - 查找学生信息\n";cout<<" 7 - 将学生信息写入文件\n";cout<<" 8 - 从文件读入学生信息\n";cout<<" 0 - 退出\n";cout<<"***************************************\n";cin>>choice;while(choice>8||choice<0){cout<<"请在0～8中选择:";cin>>choice;}switch (choice){ case 0:break;case 1:{obj.createclass();}break;case 2:{obj. get();i=i++;}break;case 3:{obj.xiugai();}break;case 4:{obj.delect();}break;case 5:{if(i==0){cout<<"没有记录，请先输入记录！"<<endl;}if(i!=0){ s ystem("cls");obj.printclass();obj.print();}break;};case 6:{obj.chazhao();break;}case 7:{obj.write();break;}case 8:{obj.read();break;}}}}。