tictactoe.cpp

this is a tic tac toe game in c++

#include <iostream>
#include <cstdlib>
using namespace std;

const int ROWS=3;
const int COLS=3;
int row=0,col=0;
int returnVal = 0;

void enterValue(char [][COLS], int, int, bool);
int checkWin(char [][COLS], int);

int main()
{
	char a[3][3] = { ' ',' ',' ',' ',' ',' ',' ',' ',' ' };
	bool playerNum = 0;

	for (int i = 0; i<=2; i++)
	{
		for (int j = 0; j<=2; j++)
		{
			cout << "[" << a[i][j] << "]";
			if (j==2)
			{
				cout << endl;
			}
		}
	}

	enterValue(a, ROWS, 9, playerNum);
}	

void enterValue(char a [][COLS], int b, int c, bool d)
{
	if (c!=0)
	{
		if (d == 0)
		{
			d = 1;
			cout << "Player 1 Enter your Position: " ;
			cin >> row >> col;
			cout << endl;

			if (a[row-1][col-1]==' ')
			{
				a[row-1][col-1]='X';
			}		
			else
			{
				cout << "sorry";
			}

			if (c<=7)
			{
				returnVal = checkWin(a, ROWS);
			}
			if (returnVal == 0)
			{
				system("CLS");
			}

			
			for (int k = 0; k<=2; k++)
			{
				for (int l = 0; l<=2; l++)
				{
					cout << "[" << a[k][l] << "]";
					if (l==2)
					{
						cout << endl;
					}
				}
			}

			if (returnVal == 0)
			{
				enterValue(a, ROWS, c-1, d);
			}
		}
		else if (d == 1)
		{
			d = 0;
			
			cout << "Player 2 Enter your Position: " ;
			cin >> row >> col;
			cout << endl;

			if (a[row-1][col-1]==' ')
			{
				a[row-1][col-1]='O';
			}		
			else
			{
				cout << "Sorry" << endl;
			}

			if (c<=7)
			{
				returnVal = checkWin(a, ROWS);
			}
			if (returnVal == 0)
			{
				system("CLS");
			}

			for (int k = 0; k<=2; k++)
			{
				for (int l = 0; l<=2; l++)
				{
					cout << "[" << a[k][l] << "]";
					if (l==2)
					{
						cout << endl;
					}
				}
			}

			if (returnVal == 0)
			{
				enterValue(a, ROWS, c-1, d);
			}
		}

	}

}

int checkWin(char a [][COLS], int b)
{
	for (int i = 0; i<b; i++)
	{
		if (a[i][0] == a[i][1] && a[i][0] == a[i][2])
		{
			if (a[i][0] != ' ')
			{
				cout << "Game Over. Player ";
				if (a[i][0]=='X')
				{
					cout << "One (X) wins" << endl;
				}
				else if (a[i][0]=='O')
				{
					cout << "Two (O) wins" << endl;
				}
				return 1;
			}
			else
				return 0;
		}
	}
	for (int i = 0; i<b; i++)
	{
		if (a[0][i] == a[1][i] && a[0][i] == a[2][i])
		{
			if (a[0][i]!=' ')
			{
				cout << "Game Over. Player ";
				if (a[0][i]=='X')
				{
					cout << "One (X) wins" << endl;
				}
				else if (a[0][i]=='O')
				{
					cout << "Two (O) wins" << endl;
				}
				return 1;
			}
			else
				return 0;

		}
	}
	if (a[0][0] == a[1][1] && a[0][0] == a[2][2])
	{
		if (a[0][0] != ' ')
		{
			cout << "Game Over. Player ";
			if (a[1][1]=='X')
			{
				cout << "One (X) wins" << endl;
			}
			else if (a[1][1]=='O')
			{
				cout << "Two (O) wins" << endl;
			}
			return 1;
		}
		else
			return 0;

	}
	else if (a[0][2] == a[1][1] && a[0][2] == a[2][0])
	{
		if (a[0][2] != ' ')
		{
			cout << "Game Over. Player ";
			if (a[1][1]=='X')
			{
				cout << "One (X) wins" << endl;
			}
			else if (a[1][1]=='O')
			{
				cout << "Two (O) wins" << endl;
			}
			return 1;
		}
		else
			return 0;
	}

}