31)Write a Program Which Reads Three Student Marks in a Test and Then Print Their Average

#include<conio.h>
#include<iostream.h>


void main()
{
   clrscr();
   int num1,num2,num3;
   float average;
   cout<<"Enter Three student marks.\n" ;
   cin>>num1>>num2>>num3;
   average=(num1+num2+num3)/3;
   cout<<"Average of  " <<num1 <<" "<<num2<<" "<<num3<<"is " <<average;
}