fifteen, won function does not seem to return if game one

Question

My plan was simple. first check if the zero is in the right place. Then see if the element is correct using a formula and adding a counter so i only do it until i reach the field where the zero should be. Somehow when i run the test that should win the game.. it asks me for more input, so i think Liam not successfully returning true for some reason :(

bool won(void)
{
    int counter=0;
    if (board[d-1][d-1]!=0)
        {
        return false;
        }
        for(int i=0;i<d;i++)
            {
            for (int j=0;j<d;j++)
                {
                if (counter<d*d)
                    {
                    if (board[i][j]!=1+j+d*j)  
                        {
                        return false;    
                        }
                    else
                        {
                        counter++;
                        }
                    }
                }

            }
    return true;
}

Answer 1

You have a typo. Either that, or you made an error in your formula.

        if (board[i][j]!=1+j+d*j)