POJ 1004

又是水题。。看来POJ开头的都是水题啊~

 

#include <stdio.h>

int main()
{
	freopen("1.txt", "r", stdin);
	float sum = 0, t;
	int m = 0;
	while( scanf("%f", &t) != EOF )
	{
		sum += t;
		m++;		
	}
	printf("$%.2f\n", sum/m);
}