/*
 * Program to compute average of integers entered as input (any number of them).
 */
#include <stdio.h>

double average(void);

int main(void) {
	printf("enter integers, anything else to stop\n");
	printf("average is %f\n", average());

	return 0;
}
 
/*
 * compute and return average of integers from stdin, stopping when anything 
 * else is entered
 */
double average(void) {
	int sum = 0;
	int n;
	int count = 0;
	while (scanf("%d", &n) == 1) {
		sum += n;
		count += 1 ;
	} 
	return ((double) sum) / count;
}