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#include "stdafx.h"
#include <iostream>
#include <ctime>
#include <cstdlib>
#include <string>
using namespace std;
//Function decleration
void clearboard( char a[] );
void redraw( char a[] );
bool checkwin( char a[] );
void playerturn( char a[] );
void cputurn( char a[] );
bool retry();
//MAIN
int main()
{
char board[9]; //game board, rows: [0]-[2], [3]-[5], [6]-[8]
string player; //records player (user or cpu)
unsigned short int turns=0; //tracks number of turns
bool gameover = false; // play again flag
do
{
// initialise gameboard
clearboard(board);
redraw(board);
do
{
turns++;
//Player's move
player = "Player";
playerturn(board);
cout << " Current Player: " << player << endl;
if(checkwin(board))
{
cout << " \n\n$$$$$ " << player << " Wins in " << turns << " turns!! $$$$$\n\n";
break;
}
//CPU move
player = "Computer";
cputurn(board);
cout << "\n Current Player: " << player << endl;
if(checkwin(board))
{
cout << " \n\n$$$$$ " << player << " Wins in " << turns << " turns!! $$$$$\n\n";
break;
}
//check for a tie
if(turns==9)
{
cout << " \n\nIt's a tie! \n\n";
break;
}
}while(turns<=9);
gameover = retry(); //play again?
}while(!gameover);
}
// Reset the board[] at the beginning of a round
void clearboard(char a[])
{
a[0] = '1';
a[1] = '2';
a[2] = '3';
a[3] = '4';
a[4] = '5';
a[5] = '6';
a[6] = '7';
a[7] = '8';
a[8] = '9';
}
//redraw the board[] after a move has been made
void redraw( char a[] )
{
unsigned short int i=0, j=0, k=0;
cout << " ***************************\n";
cout << " ***** TIC TAC TOE *****\n";
cout << " ***************************\n\n";
cout << " Rules: you are the 'X', computer will play as 'O'\n Try to make 3 in a row!\n\n";
for(i=0;i<3;i++)
{
cout << " *************\n";
cout << " * * * *\n";
cout << " *";
for(j=0;j<3;j++)
{
cout << " " << a[k] << " *";
k++;
}
cout << "\n * * * *\n";
}
cout << " *************";
}
//check to see if anyone won, the winning player is tracked by string: player
bool checkwin( char a[] )
{
//check horizontal combinations
if(a[0]==a[1] && a[1]==a[2]) return true;
else if(a[3]==a[4] && a[4]==a[5]) return true;
else if(a[6]==a[7] && a[7]==a[8]) return true;
//check vertical combinations
else if(a[0]==a[3] && a[3]==a[6]) return true;
else if(a[1]==a[4] && a[4]==a[7]) return true;
else if(a[2]==a[5] && a[5]==a[8]) return true;
//check diagonal combinations
else if(a[0]==a[4] && a[4]==a[8]) return true;
else if(a[2]==a[4] && a[4]==a[6]) return true;
else return false;
}
void playerturn( char a[] ) //Player's turn: asks where you want to place your 'X' on the board[], on a free space only (1-9)
{
unsigned short int move;
do
{
cout << " \n\nChoose your move: (1-9) \n";
cin >> move;
move--;
if(cin.fail() || move>8)
{
cin.clear();
cin.ignore();
cout << " Oops, i didn't understand that, please enter a number 1-9.. \n";
continue;
}
if(a[move]=='O' || a[move]=='X')
{
cout << " That space is already taken! try again.. \n";
continue;
}
a[move] = 'X';
redraw(a);
break;
}while(true);
}
void cputurn( char a[] ) //CPU turn, randomly places a 'O' in an empty space by generating random numbers 0 <= r <= 8
{
srand( (unsigned)time(NULL));
int r;
do
{
r = rand()%9;
if(a[r]=='O' || a[r]=='X') continue;
else
{
a[r]='O';
redraw(a);
break;
}
}while(true);
}
bool retry() // Play Again?
{
char input;
do
{
cout << "Play again? y/n: ";
cin >> input;
if(cin.fail() || (input!='y' && input!='n'))
{
cin.clear();
cin.ignore();
cout << "not understood.. please type y or n: ";
cout << endl;
continue;
}
if(input=='y')
{
return false;
break;
}
if(input=='n')
{
cout << "Thank you for playing, Goodbye! \n";
return true;
break;
}
}while(true);
}
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