#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
