Tower of Hanoi using Recursion

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Manmeet Singh 2017-10-01 00:17:23 +05:30 committed by GitHub
parent b21444d29d
commit 1e99c48d4a

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package com.manmeet;
import java.util.Scanner;
public class TowerOfHanoi
{
public static void shift(int n, String startPole, String intermediatePole, String endPole)
{
if (n == 0) // if n becomes zero the program returns thus ending the loop.
{
return;
}
// Shift function is called in recursion for swapping the n-1 disc from the startPole to the intermediatePole
shift(n - 1, startPole, endPole, intermediatePole);
System.out.println("\nMove \"" + n + "\" from " + startPole + " --> " + endPole); // Result Printing
// Shift function is called in recursion for swapping the n-1 disc from the intermediatePole to the endPole
shift(n - 1, intermediatePole, startPole, endPole);
}
public static void main(String[] args)
{
System.out.print("Enter number of discs on Pole 1: ");
Scanner scanner = new Scanner(System.in);
int numberOfDiscs = scanner.nextInt(); //input of number of discs on pole 1
shift(numberOfDiscs, "Pole1", "Pole2", "Pole3"); //Shift function called
}
}