Init() function for pset3 fifteen

init.c

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