Tic Tac Toe Game [2 Players]

/*
    It's a simple Tic Tac Toe game. 2 Players are playing.
    My algorithms is so easy, I have made a global (array) called board and its elements are zeros

    After that if the player1 plays it will set this element to be (1)
    and if player 2 plays element will be (100)

    and the who_winner algorithm:
        will depend on checking the sum of all (horizontal lines, vertical lines , diagonal lines)
        so if the sum equals the (3) then player 1 is the (winner=2)
        if the sum = 300 then player 2 is the winner (winner = 3)
        and if nothing match return winner = 0

*/

#define YES 1
#define NO 0

#include <stdio.h>


int board[3][3] = {{0,0,0},{0,0,0},{0,0,0}};    //initialize the board with zeros
int game_end_f = NO;                            // variable used as a flag
int winner;                                     // used in the who_winner() function

void draw_board(int myboard[3][3]);             // used for printing the current board
void player_x();                                // used to scan coordinates and put the proper value for player 1
void player_y();                                // the same but for player2
void check_game();                              // check if the game ends and then check (WIN,LOSE,TIE)
int who_winner(int array[3][3]);                // check who is the winner
int no_places(int array[3][3]);                 // function used to check if there any left empty cells or not
void reset();                                   // reset all the board elements to be zeros

int x_cord,y_cord;                              // variables for coordinates
char playerx_wins=0;                            // number of wins
char playery_wins=0;

int play_again=0;


int main()
{
    start:                                      //this is a label to be used by a goto statement
        system("cls");                          // clears the screen
        //system("clear");                      // for linux :)
        reset();                                // reset all
        draw_board(board);                      // draw the board for the first time


        // while the game is not ended , continue playing :)
        while(game_end_f == NO)
        {
            // if no one is winning continue
            if(winner == 0)
                player_x();
            else
                break;


            draw_board(board);

            // check now the board
            check_game();

            // if there's no winner till now and there are places left ,continue player 2 turn
            if (winner == 0 && !no_places(board))
            {

                player_y();
                draw_board(board);
                check_game();

            }

            else
                break;


        }


        // Do you want to play again ?
        printf("\n\n\tPLAYER1 Vs PLAYER2 : %d - %d",playerx_wins,playery_wins);
        printf("\n\nDo you want to play again [yes = 1] [no = anything else] : ");
        scanf("%d",&play_again);
        if (play_again == 1)
            goto start;

    return 0;
}


// this function checks the sate of the game (TIE,WIN,LOSE)
void check_game()
{
    if(no_places(board))
    {
        // TIE or WINNER
        game_end_f = YES;
        if ((who_winner(board) == 0))
            printf("TIE!!\n");
        else
            who_winner(board);

    }
    else
    {
        game_end_f = NO;
    }
    who_winner(board);

    // print the result if game ended :) winner 2 >> PLAYER 1           winner 3 >> PLAYER2
        if(winner == 2 )
        {
            printf("WIN: PLAYER 1 (X)\n");
            playerx_wins++;
        }

        else if(winner == 3)
        {
            printf("WIN: PLAYER 2 (O)\n");
            playery_wins++;
        }
}



int who_winner(int array[3][3])
{
    int i;
    int sum;
    winner = 0;
    // check the horozintal
    for(i=0; i<3 ; ++i)
    {
        sum = array[i][0] + array [i][1] + array[i][2];
        if (sum == 3)
        {
            winner = 2;
            return 2;
        }
        else if (sum == 300)
        {
            winner = 3;
            return 3;
        }
        else
        {
            winner = 0;
        }
    }


    // check the vertical
    for(i=0; i<3 ; ++i)
    {
        sum = array[0][i] + array [1][i] + array[2][i];
        if (sum == 3)
        {
            winner = 2;
            return 2;
        }
        else if (sum == 300)
        {
            winner = 3;
            return 3;
        }
        else
        {
            winner = 0;
        }
    }

    // check the diagonal
        sum = array[0][0] + array [1][1] + array[2][2];
        if (sum == 3)
        {
            winner = 2;
            return 2;
        }
        else if (sum == 300)
        {
            winner = 3;
            return 3;
        }
        else
        {
            winner = 0;
        }

        sum = array[0][2] + array[1][1] + array[2][0];
        if (sum == 3)
        {
            winner = 2;
            return 2;
        }
        else if (sum == 300)
        {
            winner = 3;
            return 3;
        }
        else
        {
            winner = 0;
        }

    return 0;
}


// draw board function
void draw_board(int myboard[3][3])
{

    int i,j;
    system("cls");
    printf("TIC TAC TOE GAME - By Islam Negm \n\n");
    printf("-------------\n");
    for (i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            if (myboard[i][j] == 0)
                printf("|   ");
            else if(myboard[i][j] == 1)
                printf("| x ");
            else if(myboard[i][j] == 100)
                printf("| o ");
        }
        printf("|\n");
        printf("-------------\n");
    }
}

void player_x()
{
    // scan coordinates , note that row=1 means the [0] in the array :) , the users are not programmers :D
    printf("PLAYER1 (X):\nEnter the row:");
    scanf("%d",&x_cord);
    printf("Enter the column:");
    scanf("%d",&y_cord);

    // take some decisions before ( if cell is not empty or if the coordinates is not right ) then send message to player
    if( (board[x_cord - 1][y_cord - 1] == 0) && x_cord<=3 && x_cord>=1 && y_cord<=3 && y_cord>=1)
        board[x_cord - 1][y_cord - 1]=1; //
    else
    {
        printf("Wrong Move! Enter the correct coordinates.\n");
        player_x();
    }
}


void player_y()
{
    // scan coordinates , note that row=1 means the [0] in the array :) , the users are not programmers :D
    printf("PLAYER2 (O):\nEnter the row:");
    scanf("%d",&x_cord);
    printf("Enter the column:");
    scanf("%d",&y_cord);

    // take some decisions before ( if cell is not empty or if the coordinates is not right ) then send message to player
    if((board[x_cord - 1][y_cord - 1] == 0) && x_cord<=3 && x_cord>=1 && y_cord<=3 && y_cord>=1)
        board[x_cord - 1][y_cord - 1]=100;
    else
    {
        printf("Wrong Move! Enter the correct coordinates.\n");
        player_y();
    }
}

// check if no places lift ( return 0 >>> if still empty places ) (return 1 >> if there aren't any places )
int no_places(int array[3][3])
{
    int i,j;
    for (i=0; i<3; ++i)
    {
        for (j=0; j<3; ++j)
        {
            if (array[i][j]==0)
                return 0;
        }
    }
    return 1;
}

void reset()
{
    int i,j;

    //resetting the gaming variables
    game_end_f = NO;
    winner  = 0 ;

    //resetting the board array
    for (i=0; i<3; i++)
    {
        for(j=0; j<3; j++)
        {
            board[i][j] = 0;
        }
    }
}