C语言班级学生成绩管理系统.zip

#include<iostream> #include<fstream> #include<string> #include<iomanip> #include<windows.h> using namespace std; class Student { public : void InforInset(Student stu[]); //成绩录入 void ScoreShow(Student stu[]); //成绩显示 void SavaDate(Student stu[]); //输出文件 void InforRead(Student stu[]); //读取文件 void InforSort(Student stu[]); //成绩排序 void AddSum(Student stu[]); //成绩总和 void Modify(Student stu[]); //成绩修改 void Statis(Student stu[]); //成绩统计 int SearchByID(Student stu[],string id); //通过学号返回数组下标 private: string ID; //定义学生学号 string Name; //定义学生姓名 string Course[20]; //定义课程 float Mark[20]; //定义课程成绩 float sum; //定义成绩总和 float Aver; //定义个人平均成绩 float aver; //定义各课程平均成绩 }; int N = 0; //学生数量 int Num = 0; //课程数量 string Password = "26324636"; //密码 void displayIndex(); /*主程序*/ int main() { int fun; char returnFlag[5]; Student st[20]; Student stu; stu.InforRead(st); while(1) { displayIndex(); cout << "请输入选项："; cin >> fun; switch (fun) { case 1 : stu.InforInset(st); break; case 2: stu.ScoreShow(st); break; case 3: stu.SavaDate(st); break; case 4: stu.InforRead (st); break; case 5 : stu.InforSort(st); break; case 6: stu.Modify(st); break; case 7: stu.Statis(st); break; case 8: system("cls"); break; case 9: cout <<" 确认退出系统？（y/n）"; cin >> returnFlag; if(returnFlag[0] == 'y' || returnFlag[0] == 'Y') { exit(0); } else { continue; } break; } } return 0; } /*显示台*/ void displayIndex() { printf("╔═══════班级成绩管理系统════════╗\n"); printf("║ 1.成绩录入; ║\n"); printf("║ 2.成绩显示; ║\n"); printf("║ 3.导出成绩; ║\n"); printf("║ 4.导入成绩; ║\n"); printf("║ 5.成绩排序; ║\n"); printf("║ 6.成绩修改; ║\n"); printf("║ 7.成绩统计; ║\n"); printf("║ 8.清屏; ║\n"); printf("║ 9.安全退出系统; ║\n"); printf("║ ║\n"); printf("║ Made By 钟佳闱 QQ26324636║\n"); printf("╚═══════════════════════╝\n"); } /*成绩录入*/ void Student :: InforInset(Student stu[]) { int i,j,h; char returnFlag[5]; while(1) { cout << "请输入需要录入的学生数量："; cin >> N; cout << "请输入课程数量："; cin >> Num; cout << "请输入课程名称："; for(i = 0 ; i < Num ; i ++) { cin >> stu[0].Course[i]; } for(i = 0 ; i < N ;i ++) { cout << "请输入学号："; cin >> stu[i].ID; cout << "请输入姓名："; cin >> stu[i].Name; cout << "请分别输入"; for(h = 0 ; h < Num - 1 ; h ++) { cout << stu[0].Course[h] << ","; } cout << stu[0].Course[Num - 1] << "的成绩："; for(j = 0; j < Num ; j ++) { cin >> stu[i].Mark[j]; } } cout << "成绩录入完毕，请记得先保存数据再继续操作哦~\n是否继续录入学生成绩？（y/n）:"; cin >> returnFlag; if(returnFlag[0] == 'y' || returnFlag[0] == 'Y') { continue; } else { break; } } } /*成绩平均分总分*/ void Student :: AddSum(Student stu[]) { int i,j; for(i = 0 ; i < N ; i ++) { stu[i].sum = 0; for(j = 0 ; j < Num ; j ++) { stu[i].sum += stu[i].Mark[j]; } stu[i].Aver = stu[i].sum / Num; } } /*成绩显示*/ void Student :: ScoreShow(Student stu[]) { int i,j; printf("----------------------------------------------------------------------\n"); cout << setw(10) << right <<"学号" << setw(10) << right << "姓名"; for(i = 0 ; i < Num ; i ++) { cout<< setw(10) << stu[0].Course[i]; } cout << setw(10) << right << "平均分" << setw(10) << right << "总分"; cout << endl; printf("----------------------------------------------------------------------\n"); AddSum(stu); for(i = 0 ; i < N - 1 ; i ++) { cout << setw(10) << right << stu[i].ID <<setw(10) << right << stu[i].Name; for(j = 0 ; j < Num ; j ++) { cout << setw(10) << setprecision(1)<<fixed<< right << stu[i].Mark[j]; } cout << setw(10) << right << stu[i].Aver << setw(10) << right << stu[i].sum; cout << endl; } } /*输出文件*/ void Student::SavaDate(Student stu[]) { int i,j; ofstream outfile("班级成绩管理系统.txt",ios::out); if(!outfile) { cerr << "open error!" << endl; exit(1); } outfile <<"----------------------------------------------------------------------\n"; outfile << "学号" << '\t' << "姓名" << '\t' ; for(i = 0 ; i < Num ; i ++) { outfile << stu[0].Course[i] <<'\t'; } outfile << '\n'; outfile <<"----------------------------------------------------------------------\n"; for(i = 0 ; i < N ; i ++) { outfile << stu[i].ID << '\t' << stu[i].Name << '\t'; for(j = 0 ; j < Num ; j ++) { outfile << stu[i].Mark[j] << '\t'; } outfile << '\n'; } cout << "文件导出完成！" << endl; outfile.close(); } /*文件读取数据*/ void Student :: InforRead(Student stu[]) { int flag,h; char buf[1000]; // char buf1[1000]; string s; Num = 0; ifstream infile("班级成绩管理系统.txt",ios :: in); if(!infile) { cerr << "文件不存在，请输入新的数据!" <<endl; } else { infile.getline(buf,1000); flag = 0 ; while(infile >> s ) { flag ++; if(s == "----------------------------------------------------------------------") { break; } if(flag > 2 ) { stu[0].Course[Num++] = s; } } // infile.getline(buf1,1000); N = 0; while(!infile.eof()) { infile >> stu[N].ID >> stu[N].Name; for(h = 0 ; h < flag - 3 ; h ++) { infile >> stu[N].Mark[h]; } N ++; } cout << "数据导入完成！" << endl; infile.close(); } } /*成绩排序*/ void Student ::InforSort (Student stu[]) { int i,j; Student temp; AddSum(stu); for(i = 0 ; i < N - 1 ; i ++) { for(j = 0 ; j < N - 1- i ; j ++) { if(stu[j].sum < stu[j + 1].sum) { temp = stu[j]; stu[j] = stu[j + 1]; stu[j + 1] = temp; } } } ScoreShow(stu); } /*通过学号返回数组下标*/ int Student :: SearchByID(Student stu[],string id) { int i; for(i = 0 ; i < N ; i ++) { if(id == stu[i].ID) { return i; } } return -1; } /*成绩修改*/ void Student ::Modify(Student stu[]) { string xh,pass; int returnnum,h,j,flag; flag = 3; cout <<"请输入8位密码："; while(1) { cin >> pass; if(pass == Password) { cout << "密码正确！请输入你要修改的学生学号："; cin >> xh; returnnum = SearchByID(stu,xh); if(returnnum == -1) { cout << "学生不存在！"<< endl; } else { cout << "请重新输入学生信息："<<endl; cout << "请输入学号："; cin >> stu[returnnum].ID; cout << "请输入姓名："; cin >> stu[returnnum].Name; cout << "请分别输入"; for(h = 0 ; h < Num - 1 ; h ++) { cout << stu[0].Course[h] << ","; } cout << stu[0].Course[Num - 1] << "的成绩："; for(j = 0; j < Num ; j ++) { cin >> stu[returnnum].Mark[j]; } } cout << "修改完后记得保存读出数据哦！" << endl; } else { flag --; if(flag > 0) { cout << "密码错误，你还有" << flag << "次机会，请重新输入密码："; continue; } else { break; } } } } /*成绩统计*/ void Student ::Statis(Student stu[]) { int i,j,flag,flag1,flag2 ; float aver; float max ; cout << "*****************************************************************" << endl; cout << " 各课程最高成绩学生统计 " << endl; cout << "*****************************************************************" << endl; cout << setw(15) << right << "课程"; cout << setw(15) << right << "学号"; cout << setw(15) << right << "姓名" ; cout << setw(15) << right << "成