阶乘结果零的个数

#include <stdlib.h>

int cal0(int N)
{
	int i, count = 0;
	for(i = 0; i <= N; i++)
	{
		int j = i;
		while(j >=5 && j % 5 == 0)
		{
			count++;
			j = j / 5;
		}
	}
	return count;
}

int main()
{
	int r = cal0(2012);
	printf("%d", r);
}