#include <stdio.h>
int Average(int i);
int main()
{
int num;
do{
printf(<q>Enter numbers ( -1 to quit ).\n</q>);
scanf(<q>%d</q>,&num);
/*if number is not -1 print the average*/
if(num != -1)
printf(<q>The average is %d</q>, Average(num));
printf(<q>\n</q>);
}
while(num>-1);
return 0;
}
int Average(int i)
{
static int sum = 0, count = 0;
sum = sum i;
count ;
return sum / count;
}


Output:
Enter numbers ( -1 to quit )
1,4,5,6

The average is 4