main.c

// @its-Kumar

#include "tic_tac_toe.h"

// return true if position in empty
int check(char board[][SIDE], int x, int y)
{
	if (board[x][y] == ' ')
		return 1;
	return 0;
}
int main(void)
{
	char choice, HUMAN_MOV, COMPUTER_MOV;
	int moves[SIDE * SIDE], mov_index = 0, turn = 1, cell, x, y, temp;
	char board[SIDE][SIDE];

	intialize(board, moves);
	show_instructions();
	printf("\n\t\t\tEnter o for 'O' and x for 'X' :");

	while (!(choice == 'o' || choice == 'x'))
	{

		scanf("%c", &choice);

		if (choice == 'o')
		{
			HUMAN_MOV = 'O';
			COMPUTER_MOV = 'X';
		}
		else if (choice == 'x')
		{
			HUMAN_MOV = 'X';
			COMPUTER_MOV = 'O';
		}
	}
	srand(time(NULL));

	while (game_over(board) == 0 && mov_index != SIDE * SIDE)
	{
		if (turn == COMPUTER)
		{
			temp = rand() % (SIDE * SIDE);
			x = moves[temp] / SIDE;
			y = moves[temp] % SIDE;
			if (check(board, x, y))
			{
				board[x][y] = COMPUTER_MOV;

				printf("\n\t\tComputer has put a %c at %d\n", COMPUTER_MOV, temp);
				show_board(board);
				turn = HUMAN;
			}
			else
			{
				mov_index--;
				turn == COMPUTER;
			}
			mov_index++;
		}
		else if (turn == HUMAN)
		{
			printf("\n\t\t\tChoose : ");
			scanf("%d", &cell);
			x = moves[cell] / SIDE;
			y = moves[cell] % SIDE;
			if (check(board, x, y))
			{
				board[x][y] = HUMAN_MOV;
				system("cls");
				printf("\n\t\tYou have put a %c at %d", HUMAN_MOV, cell);
				show_board(board);
				turn = COMPUTER;
			}
			else
			{
				printf("\t\tThe cell is already filled...");
				/*scanf("%d",&cell);
				x=moves[cell] / SIDE;
				y=moves[cell] % SIDE;
				board[x][y]=HUMAN_MOV;*/
				mov_index--;
				turn = HUMAN;
			}
			mov_index++;
		}
	}
	if (game_over(board) == 0 && mov_index == SIDE * SIDE)
		printf("\n\t\t\tIt's a Draw..!!\n");
	else
	{
		if (turn == COMPUTER)
			turn = HUMAN;
		else if (turn == HUMAN)
			turn = COMPUTER;
		winner(turn);
	}
	return 0;
}