Conway.cpp

#include<iostream>
struct GameOfLife {
	static const int xdim = 10, ydim = 10;
	bool grid[xdim][ydim];
	int turns;
	int getNeighbors(int x, int y) {
		if (x == 0) { // Left edge
			if (y == 0) // Top Left Corner
				return grid[0][1] + grid[1][1] + grid[1][0];
			if (y > 0 && y < ydim-1) // Left Edge
				return grid[0][y - 1] + grid[0][y + 1] + grid[1][y - 1] + grid[1][y] + grid[1][y + 1];
			if (y == 10) // Bottom Left Corner
				return grid[0][y - 1] + grid[1][y - 1] + grid[0][y];
		}
		else if (x > 0 && x < xdim - 1) {// Not Left Edge
			if (y == 0) // Top Edge
				return grid[x - 1][0] + grid[x - 1][1] + grid[x][1] + grid[x + 1][1] + grid[x + 1][0];
			if (y > 0 && y < ydim - 1) // middle of grid
				return grid[x - 1][y - 1] + grid[x - 1][y] + grid[x - 1][y + 1] + grid[x][y - 1] + grid[x][y + 1] + grid[x + 1][y - 1] + grid[x + 1][y] + grid[x + 1][y + 1];
			if (y == ydim-1)
				return grid[x - 1][ydim-1] + grid[x - 1][ydim-2] + grid[x][ydim-2] + grid[x + 1][ydim-2] + grid[x + 1][ydim-1];
		}
		else if (x == xdim-1) { // Right edge
			if (y == 0) // Top Right Corner
				return grid[xdim-1][1] + grid[xdim - 2][1] + grid[xdim - 2][0];
			if (y > 0 && y < ydim - 1) // Right Edge
				return grid[xdim - 1][y - 1] + grid[xdim - 1][y + 1] + grid[xdim - 2][y - 1] + grid[xdim - 2][y] + grid[xdim - 2][y + 1];
			if (y == 10) // Bottom Right Corner
				return grid[xdim - 2][y - 1] + grid[xdim - 2][y - 1] + grid[xdim - 1][y];
		}
		return 0;
	}
		
	void takeTurn() {
		auto new_grid = grid;
		for (auto xi=0; xi < GameOfLife::xdim;xi++) {
			for (auto yi=0; yi < GameOfLife::ydim; yi++){
				int numNeighbors = getNeighbors(xi, yi);
				if (numNeighbors < 2) {
					new_grid[xi][yi] = 0;
				} else if (numNeighbors > 3 && grid[xi][yi]) {
					new_grid[xi][yi] = 0;
				} else if (numNeighbors == 3) {
					new_grid[xi][yi] = 1;
				}
			}
		}
		for (auto xi=0; xi<GameOfLife::xdim;xi++){
			for (auto yi=0; yi<GameOfLife::ydim;yi++)
				grid[xi][yi] = new_grid[xi][yi];
		}
	};

	void print() { 
		for (int i=0; i < GameOfLife::xdim; i++) {
			for (int j=0; j < GameOfLife::ydim; j++){
				std::cout << grid[i][j] << " ";
			}
		std::cout << "\n";
		}
	}
	GameOfLife(){
		for (auto xi=0; xi<GameOfLife::xdim;xi++){
			for (auto yi=0; yi<GameOfLife::ydim;yi++)
				grid[xi][yi] = 0;
		}
		grid[4][4] = 1;
		grid[4][5] = 1;
		grid[5][4] = 1;
		grid[5][6] = 1;
		grid[5][7] = 1;
		int turns = 0;
	};
	~GameOfLife() {};
};


int main(int argc, char ** argv) {
	
	auto game = GameOfLife();
	
	game.print();

	for (int i=0; i < 5; i++) {
		std::cout << "\n\n";
		game.takeTurn();
		game.print(); // Should overload << operator
	}
	return 0;
}