#include<stdio.h>
#include <stdlib.h>
int main(void)
{
double pass = 0;
double fail = 0;
double counter = 0;
int result = 0;
double rate = 0;


while (result != -1){
	printf("Enter result(1=pass,2=fail,-1=end)");
	scanf("%d",&result);
	if(result==1){
		pass = pass + 1;
	}
	else{
		fail = fail + 1;
	}
	counter = counter + 1;
}

rate = pass/counter;

printf("通過人數: %d，未通過人數: %d", pass, fail);