Tic-Tac-Toe.c

#include <stdio.h>
#include <conio.h>

void printBoard();
int checkWin();
void system();

char board[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};

void main()
{
    int player = 1, input, status = -1;
    printBoard();

    while (status == -1)
    {
        player = (player % 2 == 0) ? 2 : 1;
        char mark = (player == 1) ? '%' : '&';
        printf("Please enter Number For Player %d\n", player);
        scanf("%d", &input);
        if (input < 1 || input > 9)
        {
            printf("invalid input");
        }

        board[input] = mark;
        printBoard();

        int result = checkWin();

        if (result == 1)
        {
            printf("Player %d is the Winner", player);
            return;
        }
        else if (result == 0)
        {
            printf("draw");
            return;
        }

        player++;
    }
}

void printBoard()
{
    system("cls");
    printf("\n\n");
    printf("=== TIC TAC TOE ===\n\n");
    printf("     |     |     \n");
    printf("  %c  |  %c  |  %c  \n", board[1], board[2], board[3]);
    printf("_____|_____|_____\n");
    printf("     |     |     \n");
    printf("  %c  |  %c  |  %c  \n", board[4], board[5], board[6]);
    printf("_____|_____|_____\n");
    printf("     |     |     \n");
    printf("  %c  |  %c  |  %c  \n", board[7], board[8], board[9]);
    printf("     |     |     \n");
    printf("\n\n");
}

int checkWin()
{

    if (board[1] == board[2] && board[2] == board[3])
    {
        return 1;
    }
    if (board[1] == board[4] && board[4] == board[7])
    {
        return 1;
    }
    if (board[7] == board[8] && board[8] == board[9])
    {
        return 1;
    }
    if (board[3] == board[6] && board[6] == board[9])
    {
        return 1;
    }
    if (board[1] == board[5] && board[5] == board[9])
    {
        return 1;
    }
    if (board[3] == board[5] && board[5] == board[7])
    {
        return 1;
    }
    if (board[2] == board[5] && board[5] == board[8])
    {
        return 1;
    }
    if (board[4] == board[5] && board[5] == board[6])
    {
        return 1;
    }

    int count = 0;
    for (int i = 1; i <= 9; i++)
    {
        if (board[i] == 'X' || board[i] == 'O')
        {
            count++;
        }
    }

    if (count == 9)
    {
        return 0;
    }
    return -1;
}