tictac.h

#include <cstdio>
#include <cstdlib>
#include <iostream>

using namespace std;

char mat[3][3], p1, p2;
int init();
void display();
int input(char, int, int);
char check();

int init()
{
    int i, j;
    for (i=0; i<3; i++)
		for (j=0; j<3; j++)
            mat[i][j] = '-';
}    

void display()
{
	
	int i, j;
	system("clear");
	cout<<"\nWelcome to the Tic-Tac-Toe Game!\n\nGrid Co-ordinates : "<<endl<<endl;
        
    for (i=0; i<3; i++)
	{
		cout<<"\t";
	    for (j=0; j<3; j++)
			cout<<i<<" "<<j<<"    ";    
		cout<<endl;   
	}       

	cout<<"\nThe Tic-Tac-Toe board : "<<endl<<endl;
	for (i=0; i<3; i++)
	{
		cout<<"\t";
	    for (j=0; j<3; j++)
		    cout<<" "<<mat[i][j]<<"     ";
		cout<<endl;
	}		
}

int input(char choice, int x, int y)
{
	if (x >= 0 && x <= 2 && y >= 0 && y<= 2)	
		if (mat[x][y] == '-')
		{
			mat[x][y] = choice;
			return 0;
		}	
		else
		{
			cout<<endl<<"Co-ordinates "<<x<<" "<<y<<" are already used!"<<endl<<"Press ENTER to continue..."<<endl;
			do{}
			while(cin.get() != '\n');			
			return 1;
		}
	else
	{
		cout<<"\nInvalid Co-ordinates!"<<endl<<"Press ENTER to continue..."<<endl;
		do{}
		while(cin.get() != '\n');
		return 1;
	}	
	
}

char check()
{
	int i, j;
	char temp;

	for (j=0; j<3; j++)
	{
		if (mat[0][j] != '-')
		{
			temp = mat[0][j];
			if (j == 0)
			{
				if (mat[0][1] == temp)
					if (mat[0][2] == temp)
						return temp;
				if (mat[1][0] == temp)
					if (mat[2][0] == temp)
						return temp;
				if (mat[1][1] == temp)
					if (mat[2][2] == temp)	
						return temp;				
			}
			else if (j == 1)	
			{
				if (mat[1][1] == temp)
					if (mat[2][1] == temp)
						return temp;
			}
			else 
			{
				if (mat[1][2] == temp)
					if (mat[2][2] == temp)
						return temp;
			}
		}
	}
	for (i=1; i<3; i++)
	{
		if (mat[i][0] != '-')
		{
			temp = mat[i][0];
			if (i == 1)
			{
				if (mat[1][1] == temp)
					if (mat[1][2] == temp)
						return temp;
			}
			else
			{
				if (mat[2][1] == temp)
					if (mat[2][2] == temp)
						return temp;
				if (mat[1][1] == temp)
					if (mat[0][2] == temp)
						return temp;
			}
		}
	}
	
	return 'f';

}