[Solved] C++ check if there are players on the way in Chess game

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And you really need a solution, supposing positions are int :

if (abs(x - this->getLocX()) == abs(y - this->getLocY()))
{ 
  int cx = this->getLocX();
  int cy = this->getLocY();
  int dx = (x > cx) ? 1 : -1;
  int dy = (y > cy) ? 1 : -1;

  while (cx != x)
  {
    cx += dx;
    cy += dy;
    if (boardP->hasPiece(cx, cy))
      return true; // THERE ARE PLAYERS IN THE WAY
  }
  return false; // THERE ARE NO PLAYERS IN THE WAY
}

solved C++ check if there are players on the way in Chess game