This program calculates an average of the numbers entered

#include
int Average(int i);

int main()
{
int num;
do
{
printf("Enter numbers.\n");
scanf("%d",&num);
if(num != -1)
printf("The average is %d", Average(num));
printf("\n");

}while(num>-1);

return 0;
}

int Average(int i)
{
static int sum = 0, count = 0;
sum = sum + i;
count++;
return sum / count;
}