#include <iostream.h>
#include <stdlib.h>
#include <string.h>

int cmp1(const void *a,const void *b)
{
	return *(char*)a-*(char*)b;
}

int cmp2(const void *a,const void *b)
{
	return -*(char*)a+*(char*)b;
}

void main()
{
	int count;
	int num;
	char num1[5],num2[5];
	int max,min;
	while(1)
	{
		count=0;
		cin>>num;
		if(num==-1)
			break;
		cout<<"N="<<num<<":"<<endl;
		if(num%1111==0 || num>9999 || num<1000)
		{
			cout<<"No!!"<<endl;
			continue;
		}
		itoa(num,num1,10);
		itoa(num,num2,10);
		while(1)
		{
			count++;
			qsort(num1,strlen(num1),sizeof(char),cmp1);
			qsort(num2,strlen(num2),sizeof(char),cmp2);
			min=atoi(num1);
			max=atoi(num2);
			cout<<max<<"-"<<min<<"="<<max-min<<endl;
			if(max-min==0 || max-min==6174)
			{
				cout<<"Ok!! "<<count<<" times"<<endl;
				break;
			}
			itoa(max-min,num1,10);
			itoa(max-min,num2,10);
		}
	}
}

• 过了 (1025) 00448322 2005-04-28 19:12:18