screen.h

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#pragma once
 
class Screen {
public:
  explicit Screen(int width, int height);
  int width() const;
  int height() const;
  virtual void charAtPut(int col, int row, char value) = 0;
  virtual void clear() = 0;
 
protected:
  void checkCoordinates(int col, int row) const;
 
  int width_;
  int height_;
};