#include "stdafx.h"
 
// DRAW DEFAULT BOARD
char board[3][3];
 
// HOW MANY MOVES
int moves = 0;
// WHOS TURN
bool Turn;
 
// DRAW THE PLAYING FIELD
void DrawBoard() 
{
	// SHOW MOVES
	printf("\nMove #%d\n", moves);
	// DRAW TOP
	printf("*************\n");
	// LOOP THROUGH HEIGHT
	for(int i=0;i<3;i++)
	{
		// LOOP THROUGH WIDTH
		for(int j=0;j<3;j++)
		{
			// SHOW EACH POSITION
			printf("|_%c_", board[i][j]);
		}
		// ADD AN EXTRA END LINE
		printf("|\n");
	}
	// DRAW BOTTOM
	printf("*************\n");
}
 
// CALCULATE MOVING POSITION
bool CanMove(int posX, int posY)
{
	// TRIGGER STARTS TRUE
	bool ok = true;
	// ERROR MESSAGE
	char *str = "";
 
	// IF USER ALREADY HAS POSITION
	if(board[posX][posY] == 'X')
	{
		// NOT MOVEABLE
		ok = false;
		// ERROR
		if(Turn)
			str = "You already have that spot!";
	}
	// IF COMPUTER ALREADY HAS POSITION
	else if(board[posX][posY] == 'O')
	{
		// NOT MOVEABLE
		ok = false;
		// ERROR
		if(Turn)
			str = "That spot is controlled by the other player!";
	}
 
	// SHOW ANY ERRORS
	if(str != "")
		printf("%s", str);
 
	// RETURN THE VALUE OF OK
	return ok;
}
 
// GET USER MOVE
void UserMove()
{
	// DECLARE POSITION VARIABLES
	int posX, posY;
 
	// GET WIDTH
	printf("\nHow many places over (0-2): ");
	scanf ("%d", &posX);
	// GET HEIGHT
	printf("\nHow many places down (0-2): ");
	scanf ("%d", &posY);
 
	// CAN THEY MOVE THERE?
	if(CanMove(posX, posY))
	{
		// USER MOVES THERE
		board[posX][posY] = 'X';
		// COMPUTERS TURN
		Turn = false;
		// MADE A MOVE
		moves++;
	}
}
 
// COMPUTERS TURN
void ComputerMove()
{
	// IF COMPUTER GOES FIRST - MOVE TO CENTER
	if(moves == 0)
		board[1][1] = 'O';
	// THINK ABOUT MOVE
	else if(moves == 1)
	{
		// CHECK CENTER
		if(CanMove(1,1))
			board[1][1] = 'O';
		// CHECK TOP LEFT COURNER
		else if(CanMove(0,0))
			board[0][0] = 'O';
		// CHECK TOP RIGHT COURNER
		else if(CanMove(3,0))
			board[3][0] = 'O';
		// CHECK BOTTOM LEFT COURNER
		else if(CanMove(0,3))
			board[0][3] = 'O';
		// CHECK BOTTOM RIGHT COURNER
		else if(CanMove(3,3))
			board[3][3] = 'O';
	}
	else
	{
		// TODO: Reaction to other moves
	}
 
	// USERS TURN
	Turn = true;
	// MADE A MOVE
	moves++;
}
 
int _tmain(int argc, _TCHAR* argv[])
{
	// PLAYING
	bool Playing = true;
 
	// FILL BOARD
	for(int i=0; i<3; i++)
	{
		for(int j=0; j<3; j++)
		{
			board[i][j] = '_';
		}
	}
 
	// DO YOU WANT TO GO FIST?
	printf("Do you want to go first? (y/n): ");
	// GET THE Y/N VALUE
	char val;
	scanf("%c", &val);
	// ITS USERS TURN
	if(val == 'y')
		Turn = true;
	// ITS COMPUTERS TURN
	else
		Turn = false;
 
	//  WHILE GAME IS GOING
	while(Playing)
	{
		// WHILE ITS USERS TURN
		if(Turn)
			UserMove();
		else
			ComputerMove();
 
		// DRAW THE BOARD AT THE END OF EVERY TURN
		DrawBoard();
	}
 
	// RETURN
	return 0;
}