经典hanno

/*
hanno tower
	
     -1-                 |                  |
    --2--                |                  |
   ---3---               |                  |
     ...                 |                  |
 -----n-----        ------------      -------------

      A                  B                  C


*/
void move(int n, char a, char b)
{
	cout<<n<<" "<<a<<"->"<<b<<endl;
}

void hanno(int n, char a, char b, char c)
{
	if (n==1)
	{
		move(n, a, c);
		return;
	}

	hanno(n-1, a, c, b);
	move(n, a, c);
	hanno(n-1, b, a, c);
}