5 replies to this topic

[BlaineSch]

So the point of the game, using any language, is to switch the value of two variables in a unique way. It does not have to be efficient.

Traditionally you'd have a temporary variable, assign the first variable to it, assign the second variable the first variable, then the first the temporary variable.

<?PHP
$a = "CodeCall!";
$b = "Hello ";

$t = $b;
$b = $a;
$a = $t;

echo $a.$b; //Hello CodeCall!

[nicckk]

In Java

public class XOR

{

	public static void main(String[] args)

	{

		int ii1 = 1;

		int ii2 = 2;


		System.out.print(ii1 + " ");

		System.out.println(ii2);

		ii1 ^= ii2;

		ii2 ^= ii1;

		ii1 ^= ii2;

		System.out.print(ii1 + " ");

		System.out.println(ii2);

	}


}

[Alexander]

XOR is for sissies.

#include <stdio.h>

int main(void) {
  int ii1 = 1234567890;
  int ii2 = 42;
  ii1 = ii1 + ii2;
  ii2 = ii1 - ii2;
  ii1 = ii1 - ii2;
  printf("%d %d", ii1, ii2);
  return 0;
}

[wim DC]

Hmmmm, sounds like I need to store the variables in a list, reverse the list, and then take them out again.

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;


public class Whatever{

public static void main(String[] args) {

        int a=0;

        int b=2;

        List<Integer> list = new ArrayList<Integer>();

        list.add(a);

        list.add(b);

        Collections.reverse(list);

        a = list.get(0);

        b = list.get(1);

        System.out.println("a: " + a + "   b: " + b);

}

}

[eafkuor]

Using RSA, ladies :thumbup:

int main(){

	int a=2, b=8;


	printf("%d %d\n", a, b);

	a=a*a*a;

	b=(a*a*a)%15;

	printf("%d %d\n", a, b);

}

[BlaineSch]

This method required they both be an array:

<script type="text/javascript">
    var a = [0, 1];
    console.log(a); // [0, 1]
    a = [a[1], a[0]];
    console.log(a); // [1, 0]
</script>