#include "stdafx.h"
#include <iostream>
#include <stack>
void StartHanoi(int n);
void Hanoi(int length, std::stack<int>* source, std::stack<int>* middle, std::stack<int>* destination);
void PrintStack();
void PrintAStack(std::stack<int> stackToBePrint);
std::stack <int> source, middle, destination;
int _tmain(int argc, _TCHAR* argv[])
{
int iNumDisc = 0;
while(iNumDisc<=0)
{
std::cin>>iNumDisc;
}
StartHanoi(iNumDisc);
return 0;
}
void StartHanoi(int n)
{
if(n<=0)
{
return;
}
for(int i=n;i>0;i--)
{
source.push(i);
}
PrintStack();
Hanoi(source.size(),&source,&middle,&destination);
}
void Hanoi(int length, std::stack<int>* psource, std::stack<int>* pmiddle, std::stack<int>* pdestination)
{
if(length==0)
{
return;
}
// Move n-1 to middle
if(length>1)
{
Hanoi(length-1, psource, pdestination, pmiddle);
}
// Move last disc in the source pole to destination pole
int temp = psource->top();
psource->pop();
pdestination->push(temp);
PrintStack();
// Move middle to destination
if(length>1)
{
Hanoi(length-1, pmiddle, psource, pdestination);
}
}
void PrintStack()
{
PrintAStack(source);
PrintAStack(middle);
PrintAStack(destination);
std::cout<<std::endl;
}
void PrintAStack(std::stack<int> stackToBePrint)
{
if(stackToBePrint.size()<=0)
{
std::cout<<'-'<<std::endl;
return;
}
// source
while(stackToBePrint.size()>0)
{
int temp = stackToBePrint.top();
stackToBePrint.pop();
std::cout<<temp<<' ';
}
std::cout<<std::endl;
}