请帮我看看卡布列克计算哪里有问题谢谢

Question

#include <stdio.h>
int small(int a, int b);
int big(int a, int b);


int main()
{
	int n, a, b, c, d;
	int min, max, min1, max1, min2, max2, mid1, mid2;
	int n1, n2;
	printf("请输入一个各位数字完全不相同的四位数:"); 
	scanf("%d", &n);
	a = n / 1000;
	b = n / 100 % 10;
	c = n / 10 % 10;
	d = n / 1 % 10;
	min1 = small(a, b);
	max1 = big(a, b);
	min2 = small(c, d);
	max2 = big(c, d);
	if(min1 < min2){
	  min = min1;
	 mid1 = min2;
    }
	else{
	  min = min2;
	 mid1 = min1;
    }
	if(max1 > max2){
	  max = max1;
	 mid2 = max2;
	}
	else{
	 max = max2;
	mid2 = max1;
	}
	a = max, d = min;
	if(mid1 > mid2){
		c = mid1;
		d = mid2;
	}
	else{
		c = mid2;
		d = mid1;
	}
	n1 = 1000 * d + 100 * c + 10 * b + a;
	n2 = 1000 * a + 100 * b + 10 * c + d;
	printf("结果为%d", n2 - n1);
	return 0;
}


int small(int x, int y)
{
	int ret;
	if(x < y) ret = x;
	else ret = y;
	return ret;
}


	  
int big(int x, int y)
{
	int ret;
	if(x > y) ret = x;
	else ret = y;
	return ret;
}
	

 

Answer 1

不停循环直到求出的值相等