It still works!!!... It still works???

TheAlliedCentralAxis (23)
I have implemented Conway's Game of Life (http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life) into a C++ program and here it is:
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#include <iostream>

using namespace std;

const int HEIGHT = 45;
const int WIDTH = 39;

void nextGeneration(char grid[][WIDTH]);
void printGrid(char grid[][WIDTH]);

int main()
{
	char grid[HEIGHT][WIDTH];

	for (int row = 0; row < HEIGHT; row++)
		for (int column = 0; column < WIDTH; column++)
			grid[row][column] = '_';

	grid[3][5] = 'O'; grid[3][6] = 'O'; grid[4][5] = 'O';
	grid[4][6] = 'O'; grid[14][3] = 'O'; grid[14][4] = 'O';
	grid[14][8] = 'O'; grid[14][9] = 'O'; grid[16][4] = 'O';
	grid[16][8] = 'O'; grid[17][5] = 'O'; grid[17][6] = 'O';
	grid[17][7] = 'O'; grid[18][5] = 'O'; grid[18][6] = 'O';
	grid[18][7] = 'O'; grid[21][8] = 'O'; grid[22][7] = 'O';
	grid[22][8] = 'O'; grid[22][9] = 'O'; grid[23][6] = 'O';
	grid[23][10] = 'O'; grid[24][8] = 'O'; grid[25][5] = 'O';
	grid[25][11] = 'O'; grid[26][5] = 'O'; grid[26][11] = 'O';
	grid[27][6] = 'O'; grid[28][7] = 'O'; grid[28][8] = 'O';
	grid[28][9] = 'O'; grid[27][10] = 'O'; grid[37][7] = 'O';
	grid[37][8] = 'O'; grid[38][7] = 'O'; grid[38][8] = 'O';

	for (int iteration = 0; iteration < 5; iteration++)
	{
		printGrid(grid);
		nextGeneration(grid);
	}

	cout << endl;

	return 0;
}

void nextGeneration(char grid[][WIDTH])
{
	int row, column;
	char newGrid[HEIGHT][WIDTH];
	int counter = 0;

	for (column = 0; column < WIDTH; column++)
		for (row = 0; row < HEIGHT; row++)
			newGrid[row][column] = '_';

	for (column = 0; column < WIDTH; column++)
	{
		for (row = 0; row < HEIGHT; row++)
		{
			if (row == 0 && column == 0)
			{
				if (grid[row + 1][column] == 'O')
					counter++;
				if (grid[row][column + 1] == 'O')
					counter++;
				if (grid[row + 1][column + 1] == 'O')
					counter++;
			}
			else if (row == HEIGHT - 1 && column == 0)
			{
				if (grid[row - 1][column] == 'O')
					counter++;
				if (grid[row][column + 1] == 'O')
					counter++;
				if (grid[row - 1][column + 1] == 'O')
					counter++;
			}
			else if (row == 0 && column == WIDTH - 1)
			{
				if (grid[row + 1][column] == 'O')
					counter++;
				if (grid[row][column - 1] == 'O')
					counter++;
				if (grid[row + 1][column - 1] == 'O')
					counter++;
			}
			else if (row == HEIGHT - 1 && column == WIDTH - 1)
			{
				if (grid[row - 1][column] == 'O')
					counter++;
				if (grid[row][column - 1] == 'O')
					counter++;
				if (grid[row - 1][column - 1] == 'O')
					counter++;
			}
			else if (row == 0)
			{
				if (grid[row + 1][column] == 'O')
					counter++;
				if (grid[row][column + 1] == 'O')
					counter++;
				if (grid[row + 1][column + 1] == 'O')
					counter++;
				if (grid[row][column - 1] == 'O')
					counter++;
				if (grid[row + 1][column - 1] == 'O')
					counter++;
			}
			else if (row == HEIGHT - 1)
			{
				if (grid[row - 1][column] == 'O')
					counter++;
				if (grid[row][column + 1] == 'O')
					counter++;
				if (grid[row - 1][column + 1] == 'O')
					counter++;
				if (grid[row][column - 1] == 'O')
					counter++;
				if (grid[row - 1][column - 1] == 'O')
					counter++;
			}
			else if (column == 0)
			{
				if (grid[row - 1][column] == 'O')
					counter++;
				if (grid[row][column + 1] == 'O')
					counter++;
				if (grid[row - 1][column + 1] == 'O')
					counter++;
				if (grid[row + 1][column] == 'O')
					counter++;
				if (grid[row + 1][column + 1] == 'O')
					counter++;
			}
			else if (column == WIDTH - 1)
			{
				if (grid[row - 1][column] == 'O')
					counter++;
				if (grid[row][column - 1] == 'O')
					counter++;
				if (grid[row - 1][column - 1] == 'O')
					counter++;
				if (grid[row + 1][column] == 'O')
					counter++;
				if (grid[row + 1][column - 1] == 'O')
					counter++;
			}
			else
			{
				if (grid[row - 1][column] == 'O')
					counter++;
				if (grid[row][column + 1] == 'O')
					counter++;
				if (grid[row - 1][column + 1] == 'O')
					counter++;
				if (grid[row + 1][column] == 'O')
					counter++;
				if (grid[row + 1][column + 1] == 'O')
					counter++;
				if (grid[row - 1][column - 1] == 'O')
					counter++;
				if (grid[row + 1][column - 1] == 'O')
					counter++;
				if (grid[row][column - 1] == 'O')
					counter++;
			}
			if (counter < 2 || counter > 3)
				newGrid[row][column] = '_';
			if (counter == 3)
				newGrid[row][column] = 'O';
			if (counter == 2 && grid[row][column] == 'O')
				newGrid[row][column] = 'O';
			counter = 0;
		}
	}
	for (column = 0; column < WIDTH; column++)
		for (row = 0; row < HEIGHT; row++)
			grid[row][column] = newGrid[row][column];
}

void printGrid(char grid[][WIDTH])
{
	for (int row = 0; row < HEIGHT; row++)
	{
		cout << '|';
		for (int column = 0; column < WIDTH; column++)
			cout << grid[row][column] << '|';
		cout << endl;
	}
	cout << endl;
}
This code works fine until the value of WIDTH is changed to 40 or greater. The code still works fine BUT the grid is not printed as expected. One should note that at 40 or greater, the width of the grid is larger than the width of the viewing window. Is there something wrong with my code or is this just something that the compiler does when text is printed beyond the boundary of the viewing window? Please help, thanks in advance! :)

Note: I'm using Visual C++ 2008 Express Edition if that is of any importance.
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