Tic Tac Toe... so close...
Hey guys, me again. Sorry to pester you so much, but once again I am stuck on an assignment. I'm supposed to create a game of tic tac toe that engages the user with a simple AI from the computer. Now, I have the whole thing mapped out except for one part...checking the win condition. Here's what code I have so far:
Code:
// TicTacToeVsAI.c.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "simpio.h"
#include <stdlib.h>
#define size 3
#define maxMoves 9
void initBoard(char board[size][size]); //Initializes the board for the first time
void clearBoard(char board[size][size]); //Initializes the board with 'empty' spaces
void printBoard(char board[size][size]); //Shows the current status of the board
bool checkWin(char board[size][size]); //Checks if anyone has won at the current time
bool TicTacToe(char board[size][size]); //Initializes the game
void GetMove(char board[size][size]); //Reads in and places the player's choice of location
void CompMove(char board[size][size]); //Causes the computer to make a move
main()
{
char board[size][size];
printf("To play the simple game of tic tac toe, enter the number of the space which \n");
printf("you wish to place your mark in. When either player manages to get 3 in a row, \n");
printf("diagonally, vertically, or horizontally, that player wins, otherwise,\nthe game is a draw.\n");
initBoard(board);
printBoard(board);
clearBoard(board);
TicTacToe(board);
}
void initBoard(char board[size][size])
{
int row,column;
int num=49; //Since this is going to initialize the board in such a way as to show
//the user how to play, we use num to label the squares of the board
for (row=0;row<size;row++)
{
for (column=0;column<size;column++)
{
board[row][column]=num;
num++;
}
}
}
void clearBoard(char board[size][size])
{
int row,column;
for (row=0;row<size;row++)
{
for (column=0;column<size;column++)
{
board[row][column]=' '; //By filling the board with spaces, we are 'clearing' the board.
}
}
}
void printBoard(char board[size][size])
{
int row,column;
for (row=0;row<size;row++)
{
for (column=0;column<size;column++)
{
printf("%c", board[row][column]);
if (column!=(size-1)) printf("|");
}
if (row!=(size-1)) printf("\n-+-+-\n");
}
printf("\n");
}
bool TicTacToe(char board[size][size])
{
int player=1;
int move=0; //The number of moves that have been made so far this game.
while (move<=maxMoves)
{
if (player==1) GetMove(board);
else CompMove(board);
printBoard(board);
player*=-1;
}
return true;
}
void GetMove(char board[size][size])
{
int choice;
bool flag=true;
printf("Player, please enter your choice of location: ");
while (flag)
{
choice=GetInteger();
switch (choice)
{
case 1: if (board[0][0]==' ') {board[0][0]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
case 2: if (board[0][1]==' ') {board[0][1]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
case 3: if (board[0][2]==' ') {board[0][2]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
case 4: if (board[1][0]==' ') {board[1][0]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
case 5: if (board[1][1]==' ') {board[1][1]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
case 6: if (board[1][2]==' ') {board[1][2]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
case 7: if (board[2][0]==' ') {board[2][0]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
case 8: if (board[2][1]==' ') {board[2][1]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
case 9: if (board[2][2]==' ') {board[2][2]='X'; flag=false;} else printf("Invalid choice, try again\n"); break;
}
}
}
However, I need some help writing the checkWin function which checks the entire board for any win conditions. I'm completely stumped, and I have no idea how to go about this. Although code is appreaceated, even just some prompts on how I might go about this task would be greatly appreciated. Also, I was wondering if there was anyway to make the computer use that strategy where you make a triangle and block your opponent off in an attempt to stalemate the game. I've gotten the ai to the point where it's semi-smart, with the following code:
Code:
void NoLose(char board[size][size],int row,int column)
{
if (board[row][column]==' ') board[row][column]='O';
else
{
if ((row==2)&&(column==0)) NoLose(board,row-2,column+1);
if ((row==0)&&(column==1)) NoLose(board,row+2,column+1);
if ((row==0)&&(column==0)) NoLose(board,row+1,column+2);
if ((row==0)&&(column==2)) NoLose(board,row+1,column-2);
if ((row==1)&&(column==0)) NoLose(board,row+1,column+2);
if ((row==1)&&(column==2)) NoLose(board,row+1,column-2);
if ((row==2)&&(column==1)) NoLose(board,row-2,column+1);
if ((row==2)&&(column==2)) NoLose(board,row-1,column-2);
}
}
But it still gets killed by anyone with half a brain. Again, thanks in advance for any help
