Board not being drawn correctly Game of Fifteen

Question

void init(void)
{   
    int grid = (d * d) - 1;
    for (int i = 0; i < d; i++)
    {
        for (int j = 0; j < d; j++)
        {
            board[i][j] = grid;
            grid--;
        }
    }
    if ((d * d) % 2 == 0)
    {
        int temp = board[d - 1][d - 2];
        board[d - 1][d - 2] = board[d - 1][d - 3];
        board[d - 1][d - 3] = temp;
    }
}

/**
 * Prints the board in its current state.
 */
void draw(void)
{
    for (int i = 0; i < d; i++)
    {
        for (int j = 0; j < d; j++)
        {
            if (board[i][j] == 0)
            {
                printf(" ");
            }
            else
            printf("%i",board[i][j]);
        }
    }
    printf("\n");
}

When I run the program, the board is not 2d, but 1d.

Answer 1

Looks like init isn't working. I'm just guessing here because you didn't include many details about what the problem was.

Look at your for loop setups:

for (int i = d - 1; i < d; i++)

Say that d=3. Initialization sets i=2. That means you make exactly one pass through the loop. On the next pass, i=d, so the test fails and the loop exits. Same with the j loop. Why didn't you initialize i and j at 0?

Didn't look any further since this was so severe an issue.

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