screen.h

#ifndef SCREEN_H
#define SCREEN_H

#include <string>
#include <iostream>

template<unsigned H, unsigned W>
class Screen
{
public:
	typedef std::string::size_type pos;
	Screen() = default; // needed because Screen has another constructor
	// cursor initialized to 0 by its in-class initializer
	Screen(char c) :contents(H * W, c) {}
	char get() const              // get the character at the cursor
	{
		return contents[cursor];
	}       // implicitly inline
	Screen &move(pos r, pos c);      // can be made inline later

	friend std::ostream & operator<< (std::ostream &os, const Screen<H, W> & c)
	{
		unsigned int i, j;
		for (i = 0; i<c.height; i++)
		{
			os << c.contents.substr(0, W) << std::endl;
		}
		return os;
	}

	friend std::istream & operator>> (std::istream &is, Screen &  c)
	{
		char a;
		is >> a;
		std::string temp(H*W, a);
		c.contents = temp;
		return is;
	}
private:
	pos cursor = 0;
	pos height = H, width = W;
	std::string contents;
};

template<unsigned H, unsigned W>
inline Screen<H, W>& Screen<H, W>::move(pos r, pos c)
{
	pos row = r * width;
	cursor = row + c;
	return *this;
}
#endif // SCREEN_H