Write A C++ Program To Find Average Marks Of Three Subjects Of N Students In A Class By Using Array Of Structure.

#include<iostream.h> 
 #include<conio.h> 
 void main ( ) 
 {   
             struct student 
          { 
               int subject1 ; 
               int subject2 ; 
               int subject3 ; 
          }; 
                int i , n, total; 
                float av ; 
                clrscr(); 
                struct student st[20]; 
                cout<<" \n Enter the Number of Students : " ; 
                cin>> n ; 
                for (i =0; i<n; i++) 
                    { 
                           cout<<"\nEnter Marks of three Subjects of "<<i+1<<" Student : " ; 
                           total = 0 ; 
                           cin>> st[i].subject1 >>st[i].subject2>>st[i].subject3; 
                           total = st[i].subject1+st[i].subject2+st[i].subject3; 
                           av = (float) total /3 ; 
                           cout<<"\nAVERAGE Marks of " <<i+1<<" Student is = "<< av ; 
                     } 
                           getch( ); 
 }