Calculate percentage of 5 subjects.

//Program to calculate percentage of 5 subjects.
#include<iostream.h>
#include<conio.h>
void main()
{
    clrscr();
    int a,b,c,d,e;
    cout<<"Enter marks of 1st subject: ";
    cin>>a;
    cout<<"Enter marks of 2nd subject: ";
    cin>>b;
    cout<<"Enter marks of 3rd subject: ";
    cin>>c;
    cout<<"Enter marks of 4th subject: ";
    cin>>d;
    cout<<"Enter marks of 5th subject: ";
    cin>>e;
    a=(a+b+c+d+e)/5;
    cout<<"The percentage is: "<<b<<"%";
    getch();
}