黑洞数算法

#include "iostream"
#include "stdlib.h"
using namespace std;

int cave(int *p)
{
int mov;
for (int i=0;i<5;i++)
for (int j=0;j<i;j++)
{
if (*(p+i)>*(p+j))
{
mov=*(p+i);
*(p+i)=*(p+j);
*(p+j)=mov;
}
}
return 0;
}

int main()
{
int Starts=0;

int n=4;
int num[5];
int sub[30];
int *p=num;
int num_start;
cin>>num_start;
mm:
int sum=100000;
for (int i=0;i<5;i++)
{
sum=sum/10;
num[4-i]=num_start/sum;
num_start=num_start%sum;
}

cave(p);

int sum_one,sum_two,sum_sub;

sum_one=*p * 10000+*(p+1) * 1000 + *(p+2) * 100+ *(p+3) * 10+ *(p+4) *1;
sum_two=*p * 1+*(p+1) * 10 + *(p+2) * 100+ *(p+3) * 1000+ *(p+4) *10000;
sum_sub=sum_one-sum_two;

sub[Starts]=sum_sub;
for (int l=0;l<Starts;l++)
{
if (sum_sub==sub[l])
{
cout<<endl;
cout<<"从"<<sum_sub<<"开始循环"<<endl;
getchar();
getchar();
exit(-1);
}
}
Starts++;
cout<<sum_sub<<" ";
num_start=sum_sub;
goto mm;
cout<<sum_one<<endl<<sum_two<<endl;
return 0;
}