Red

#include <iostream>
#include <fstream>
using namespace std;

struct stu
{
    int ID,avg;
    string name;
    float mark[6];
};

void inpt (stu &x)
{
    int s=0;
    cout <<"Enter ID: ";
    cin >>x.ID;
    cout <<"Enter Name: ";
    cin >>x.name;
    for (int i=0;i<6;i++)
    {
    cout <<"Enter mark "<<i+1<<" of 6: ";
    cin >>x.mark[i];
    s+=x.mark[i];
    }
    x.avg=s/6;
}

void avgf (stu x[],int n)
{
    int max=x[0].avg,a;
    for (int i=0;i<n;i++)
        if (max<x[i].avg)
        {
            max=x[i].avg;
            a=i;
        }
    cout <<x[a].name<<endl;
    cout <<"The average is: "<<max;
}

void prnt (stu x)
{
    cout <<x.ID<<"\t";
    cout <<x.name<<"\t";
    for (int i=0;i<6;i++)
        cout <<x.mark[i]<<"\t";
    cout <<x.avg<<"\t";
}

int main ()
{
    stu x[100];
    int i,n=0,m,o,X,ex;
    bool Q=false;
    cout <<"Enter 1 to Add, 2 to Input, 3 for the Average, 4 to Print, 5 to Print Choices, 6 to export to file, 7 to import, 0 to Exit!\n";
    while (!Q)
    {
        cout <<"Enter the number: ";
        cin >>o;
        switch (o)
        {
        case 1:
            cout <<"Enter number of students to add: ";
            cin >>m;
            n+=m;
            break;
        case 2:
            cout <<"Enter the number of the student you wish to edit (-1 to exit)";
            do
            {
            cin >>i;
            if (i==-1)
                break;
            inpt(x[i]);
            }
            while (true);
            break;
        case 3:
            avgf(x,n);
            break;
        case 4:
            cout <<"ID\t"<<"name\t";
            for (i=0;i<6;i++)
                cout <<"Mark"<<i<<"\t";
            cout <<"Avg\n";
            for (i=0;i<n;i++)
            {
                prnt(x[i]);
                cout <<endl;
            }
            break;
        case 0:
            Q=true;
            break;
        case 5:
            cout <<"Enter 1 to Add, 2 to Input, 3 for the Average, 4 to Print, 6 to export to file, 7 to import, 0 to Exit!\n";
            break;
        case 6:
            {
            ofstream F ("D:/prog/files/test/Red2.ass",ios::binary);
            cout <<"select the number of student to export";
            cin >>ex;
            F.write((char*)&x[ex].ID,sizeof(x[ex].ID));
            F.write((char*)&x[ex].name,sizeof(x[ex].name));
            F.write((char*)&x[ex].avg,sizeof(x[ex].avg));
            for (i=0;i<6;i++)
                F.write((char*)&x[ex].mark[i],sizeof(x[ex].mark[0]));
            F.close();
            cout <<"Done!";
            }
            break;
        case 7:
            {
            ifstream F ("D:/prog/files/test/Red2.ass",ios::binary);
            cout <<"select the number of student to import";
            cin >>ex;
            F.read((char*)&x[ex].ID,sizeof(x[ex].ID));
            F.read((char*)&x[ex].name,sizeof(x[ex].name));
            F.read((char*)&x[ex].avg,sizeof(x[ex].avg));
            for (i=0;i<6;i++)
                F.read((char*)&x[ex].mark[i],sizeof(x[ex].mark[0]));
            F.close();
            cout <<"Done!";
            }
            break;
        default:
            cout <<"WRONG\n";
        }
    }
    return 0;
}