Posted on 1997-11-28
Last Modified: 2008-02-26
Do you have hear about one game developed using  C++ programming called HANOI TOWER?. If you did, please give me the idea like algorithm or program structure about that problem.
Question by:feda
LVL 84

Expert Comment

ID: 1174326
move(int from, int to, int n){
  int other=from^to;
  if( n == 0 ){ return; }
  printf("move %d from %d to %d\n",n,from,to);


Expert Comment

ID: 1174327
ozo's code has the gist of it.

To explain, the idea is that you have 3 poles with a given number of disks, each disk being progresivley larger than the next (stacked like a pyramud).

You have to move all the diskd from the first pole to the third pole while keeping the following rules:

1. You can only move one disk ata time.

2.- You can never place a larger disk on top of a smaller disk.

3.- You can move any disk to any pole in any order.

Expert Comment

ID: 1174328
If u want code fragment and description, e-mail me at:

Author Comment

ID: 1174329
Still with the Hanoi tower, what is a C++ program for the algorithm below;
tower(positive integer n, peg i, peg j , peg k)
// move the top n disks on peg i to peg k using peg j
if n=1 then
  move top disk on peg i to peg k
  move top diskk on peg i to peg k


Accepted Solution

jpk041897 earned 60 total points
ID: 1174330
The solution for C is the same as for C++, mainly:

move_tower(int n, post_t source, post_t dest, post_t tmp)
       if (num_disks == 1) {
              move1_disk(max_disks, source, dest);
       } else {
              move_tower(max_disks, num_disks - 1, source, tmp, dest);
              move1_disk(max_disks, source, dest);
              move_tower(max_disks, num_disks - 1, tmp, dest, source);

You can place move tower inside a class, say x, in which case you would change the (untested) code to:

// x.h

typedef int post_t;

class x {
      int max_disks;
      x(); // write default constructor to define number of disks to a constant value, say 5.
      x(int numdisks){ this.max_disks = numdisks; }

      void move_tower( int n, post_t source, post_t dest, postT tmp);
      void move1_disk(max_disks, source, dest);
      void display_posts(max_disks);

// x.cpp
#include "x.h"

x :: move_tower(int n, post_t source, post_t dest, post_t tmp)
       if (num_disks == 1) {
              x.move1_disk(max_disks, source, dest);// write code to increment dest and decrement source by 1
              x.display_posts(max_disks); // write code to display the contents of eac post. (See example below)
       } else {
              x.move_tower(max_disks, num_disks - 1, source, tmp, dest);
              move1_disk(max_disks, source, dest);
              x.move_tower(max_disks, num_disks - 1, tmp, dest, source);

// Place code for missing methods here.

Or just leave it as is in C and call it from main() since C code is perfectly valid in C++.

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