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something wrong with the looping

kerolz94 (7)
hi guys..
when running these codes, works fine until "Enter how many subjects: "..when i input '1' for example it will ask name of subject, how many credits for the subject, Quality Points for the subject like i wanted it to be..but after inputting values for the three prompts it will back again to "Enter how many subjects: "..there's something wrong there but i can't seem to identify the error..anyone have any clue? 

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// File Header
#include <iostream>
#include <string>
using namespace std;


void intro();
void menu();
double subcred();

int main()
{   string name;
    string ID;
    string Inst;
    string prog;
    double GPA;

    intro();
    cout<< "Enter name:";
    cin>>name;
    cout<<"Enter ID:";
    cin>>ID;
    cout<<"Enter Institute:";
    cin>> Inst;
    cout<<"Enter Program:";
    cin>>prog;

    subcred();
    GPA = subcred();
    cout<< "GPA = " << GPA << endl;

    system("pause");
    return 0;
}

void intro(){

    cout << "\n\n\n\n\n\n\n";
    cout << "\t* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n";
    cout << "\t*        Welcome To Student Exam Information System         *\n";
    cout << "\t*                                                           *\n";
    cout << "\t*                This Program Developed By                  *\n";
    cout << "\t*                Iqmal Azim & Khairul Aiman                 *\n";
    cout << "\t*                                                           *\n";
    cout << "\t*                                                           *\n";
    cout << "\t* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n";



}

void menu(){
    system("cls");
    cout << "Main Menu" << endl;
}

double subcred()
{   double GPA,qp[50],totalqp=0,totalcred=0;
    int i, subject, credit[50];
    string subname[100];
    cout<< "Enter how many subjects: ";
    cin>>subject;

    for (i=0; i<subject; i++)
    {   cout<<"================================================"<<endl;
        cout<< "name of subject [" <<i+1<< "] = ";
        cin>>subname[i];
        cout<< "how many credits for the subject? = ";
        cin>>credit[i];
        cout<<"Quality Points for the subject? = ";
        cin>>qp[i];

        totalqp += qp[i];
        totalcred +=credit[i];
        cout<<"================================================"<<endl;
    }

    GPA = totalqp/totalcred;
    return GPA;
}
MarciusV (22)
Delete lines 28-30 and try this:

 
 
    cout<< "GPA = " << subcred() << endl;
kerolz94 (7)
that fixed it! thanx!
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