高中 a020: 身分證檢驗

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#include <iostream>
using namespace std;

main() {
     string ID ;
     int code[26]={10,11,12,13,14,
                   15,16,17,34,18,
                   19,20,21,22,35,
                   23,24,25,26,27,
                   28,29,32,30,31,
                   33} ;
     while(cin >> ID)
     {
         int sum = 0 , number[11] , flag = 0;
         //number
         for(int i = ID.length() , j = 0 ; i>1 ; i-- , j++ )
         {
             number[i] = (ID[i-1] -48);
             if(j==0)
                 sum += number[i] ;
             else
                 sum += number[i] * j ; 
         }
         //English
         number[0] = code[(ID[0]-65)] / 10 ;
         number[1] = code[(ID[0]-65)] % 10 ;
         //Calculation 計算
         sum += number[0] + (number[1] * 9) ;
         //printf 
         if((sum%10)==0)
             cout << "real" << endl ;
         else
             cout << "fake" << endl ;
     }
}