Code:#include<iostream.h>
#include<conio.h>
int main()
{
clrscr();
int grade,total=0;
float avg,a=1;
char z,y,n;
cout<<"Enter the grade of the student = ";
cin>>grade;
do
{
cout<<"\nDo you want to enter another grade? (y/n) - ";
cin>>z;
if ( z == y )
{
cout<<"\nEnter the grade of the student = ";
cin>>grade;
}
if ( z == n )
{
cout<<"\nAverage of the student = "<<avg<<endl;
getch ();
return 0;
}
total=total+grade;
avg=total/a;
a++;
}while ( a == a );
cout<<"\nAverage of the student = "<<avg<<endl;
getch ();
return 0;
}