visual c class average program?

[fhy uyijk]

i just started learning how to program and i cant figure out how to get this class average problem to work in visual c

#include <stdio.h>

int main()
{
int grade ;
int counter ;
int total;
int average;

total = 0;
counter = 1;

while( counter <=10);
{
printf("enter grade:");
scanf ("%d", &grade);
total = total + grade;
counter = 1 + counter ;
}

average = total / 10;
printf ( "class average is %d\n", average);

return 0;
}