#include <stdio.h>

long trailingZeros(long n)
{
	long count=0;
	long temp=n/5;
	while (temp!=0) 
	{
		count+=temp;
		temp/=5;
	}
	return count;
}

void main()
{
	long n;
	printf("請輸入一個數：");
	scanf("%d",&n);
	printf("階乘有%d個零!\n",trailingZeros(n));
}
 

相關推薦