6174

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#include <iostream>   using namespace std;   void main() {     char input[4];           int temp=0;     int i,j;           int max_number=0;     int min_number=0;           int result=0;     int count=0;           for(i=0;i<4;i++)     {         cin>>input[i];     }           while(result != 6174)     {         for(i=0;i<4;i++)         {             for(j=i;j<4;j++)             {                 if(input[i] < input[j])                 {                                   temp = input[i];                     input[i] = input[j];                     input[j] = temp;                 }                                   max_number = (int)input[0] * 1000 + (int)input[1] * 100 + (int)input[2] * 10 + (int)input[3];                                             if(input[i] > input[j])                 {                                   temp = input[i];                     input[i] = input[j];                     input[j] = temp;                 }                                   min_number = (int)input[3] * 1000 + (int)input[2] * 100 + (int)input[1] * 10 + (int)input[0];                                   result = (min_number)-(max_number);             }         }         cout << min_number << " - " << max_number << " = " << result << endl;                   int temp = result;                   for(int i=0; i<4; i++)         {             input[i] = temp % 10;             temp /= 10;         }     } }