void makeMove(int r, int c, int n[puzzleSize][puzzleSize])
{
    if (r!=0 && n[r-1][c] == 0)
    {
        int temp = n[r-1][c];
        n[r-1][c] = n[r][c];
        n[r][c] = temp;
    }
    if (r!=4 && n[r+1][c]== 0)
    {
        int temp = n[r+1][c];
        n[r+1][c] = n[r][c];
        n[r][c] = temp;
    }
    if (c!=4 && n[r][c+1] == 0)
    {
        int temp = n[r][c+1];
        n[r][c+1] = n[r][c];
        n[r][c] = temp;
    }
    if (c!=0 && n[r][c-1] == 0)
    {
        int temp = n[r][c-1];
        n[r][c-1]= n[r][c];
        n[r][c] = temp;
    }
    return;
}