По заданной координате определить цвет клетки шахматной доски

#include <iostream>
#include <fstream>
 
using namespace std;
 
//#define DEVELOPER
 
#ifdef DEVELOPER 
 #define R_PATH "C:\\input.txt"
 #define W_PATH "C:\\output.txt"
 #define out cout
 #define in cin
#else 
 #define R_PATH "input.txt"
 #define W_PATH "output.txt"
 #define in i_file
 #define out o_file
#endif
 
int main(void)
{
  ifstream i_file(R_PATH);
  ofstream o_file(W_PATH);
  
  const int SizeChessboardN = 8;
  const int SizeChessboardM = 8;
 
  bool Chessboard[SizeChessboardN][SizeChessboardM] = {true};
  
  for(int i = 0; i < SizeChessboardN; ++i)
  {
      Chessboard[i][0] = (Chessboard[i - 1][0] ? false : true);
 
      for(int j = 1; j < SizeChessboardM; j++)
      {
          Chessboard[i][j] = (Chessboard[i][j - 1] ? false : true);
      }
  }
  /*
  for(int i = 0; i < SizeChessboardN; i++)
  {
      for(int j = 0; j < SizeChessboardM; j++)
      {
          out<<Chessboard[i][j] <<' ';
      }
 
      out<<endl;
  }*/
 
  char field[3];
  int fieldChessboardN, fieldChessboardM;
  
  in>>field;
 
  fieldChessboardN = field[0] - 64;
  fieldChessboardM = field[1] - '0';
 
  if(   fieldChessboardN >= 1 
     && fieldChessboardN <= SizeChessboardN 
     && fieldChessboardM >= 1
     && fieldChessboardM <= SizeChessboardM)
  {
     if(Chessboard[SizeChessboardN - fieldChessboardN][SizeChessboardM - fieldChessboardM])
     {
        out<<"WHITE";
     }
     else
     {
        out<<"BLACK";
     } 
  }
  
  i_file.close();
  o_file.close();
 
#ifdef DEVELOPER
 return cin.get();
#else
 return 0;
#endif
}

#include <iostream>
using namespace std;
 
int main()
{
    char ch;
    int x, y;
    cin >> ch >> y;
    cin.ignore();
    x = ch - 'A';
    --y;
 
    cout << ((x + y % 2) % 2 == 0 ? "BLACK" : "WHITE") << endl;
    return 0;
}