C语言：黑洞数495

#include <stdio.h>
int a,b,c,max,min,x,y,z;
int fuc(int n)
{
	a=n/100; b=n/10%10; c=n%10;
	if(a<=b&&b<=c) {x=c;y=b;z=a;} 
	if(a<=c&&b>=c) {z=a;y=c;x=b;}
	if(b<=a&&a<=c) {z=b;y=a;x=c;}
	if(b<=c&&c<=a) {z=b;y=c;x=a;}
	if(c<=a&&a<=b) {z=c;y=a;x=b;}
	if(c<=b&&b<=a) {z=c;y=b;x=a;}
	return x*100+y*10+z;
}
int fuc1(int n)
{
	a=n/100; b=n/10%10; c=n%10;
	if(a<=b&&b<=c) {x=c;y=b;z=a;} 
	if(a<=c&&b>=c) {z=a;y=c;x=b;}
	if(b<=a&&a<=c) {z=b;y=a;x=c;}
	if(b<=c&&c<=a) {z=b;y=c;x=a;}
	if(c<=a&&a<=b) {z=c;y=a;x=b;}
	if(c<=b&&b<=a) {z=c;y=b;x=a;}
	return z*100+y*10+x;
}
int main()
{
	int n;
	while(scanf("%d",&n)!=EOF)
	{
	    max=fuc(n); min=fuc1(n);
	    while(max-min!=495)
	    {
	    	max=fuc(n); min=fuc1(n);
	    	printf("%d: %d-%d=%d\n",n,max,min,max-min);
	    	n=max-min;
		}
		printf("\n");
	}
	return 0;
}