概率公式c的计算

#include
long fact(int n)//计算阶乘
{
	int i=0;
	long count = 1;
	for (i = 2; i <= n; i++)
		count *= i;
	return count;
}
int main()
{
	int m = 0; 
	int k = 0;
	long p = 0;
	do{
	printf("输入m，k(m>=k>0):");
		scanf("%d,%d", &m,&k);
	} while (m < k || m <= 0 || k < 0);//只有输入正确才会输入成功
	p = fact(m) / (fact(k) * fact(m - k));
	printf("p = %ld\n", p);
	return 0;
}

程序三次测试结果