Greed on C Program trouble saving game to file

Question

We're having this project of implementing Greed (greedjs.com) in C. everytime user makes a move, this function should update. as @ moves, it would leave the particular element of my BOARD[ROW][COLUMN] = 0. how can I write it into file so that instead of 0 it would print a space?

here's my code:

void update_game_file() {   
    fboard = fopen("newgame.txt", "w+");
    if(fboard==NULL){
       printf("Error!");
       exit(1);
    }
/*
 *  print board to file
 */
for (int i=0; i<ROWS; i++) {
    for (int j=0; j<COLS; j++) {
        if(BOARD[i][j] == 64)   {
            char player = BOARD[i][j];
            fprintf( fboard, "%c", player);
        } else if (BOARD[i][j] == 0) {
            char space = BOARD[i][j];
            fprintf( fboard, "%c", space);          
        } else if (BOARD[i][j] !=64) {
            fprintf( fboard, "%d", BOARD[i][j]);
        }
    }
    fprintf( fboard, "\n");
}
fclose(fboard);
}

Answer 1

the following is one way to handle the problem:

for (int i=0; i<ROWS; i++)
{
    for (int j=0; j<COLS; j++)
    {

        if (BOARD[i][j] == 0)
        {
            fprintf( fboard, " " );
        }

        else if ( BOARD[i][j] == '@' )
        {
            fprintf( fboard, "@" );
        }

        else
        {
            fprintf( fboard, "%d", BOARD[i][j]);
        }
    }
    fprintf( fboard, "\n");
}

however, this will cause some problems when reading the file back.

suggest:

for (int i=0; i<ROWS; i++)
{
    for (int j=0; j<COLS; j++)
    {

        if (BOARD[i][j] == 0)
        {
            fprintf( fboard, "%c", ' ' );
        }

        else if ( BOARD[i][j] == '@' )
        {
            fprintf( fboard, "%c", '@' );
        }

        else
        {

            fprintf( fboard, "%c", BOARD[i][j]);
        }
    }
    fprintf( fboard, "\n");
}