/*
 * compute average of integers entered as input (any number of them)
 * (this is the sum-loop program slightly modified)
 */
#include <stdio.h>

double average(void) {
	long n;
	long sum = 0;
	int count = 0;
	while (scanf("%ld", &n) == 1) {
		sum += n;
		++count;
	}
	return ((double) sum)/ count;
}

int main(void) {
	printf("enter integers to average, anything else to stop\n");
	printf("average %lf\n", average());
	return 0;
}