C :

#define CHANGE(a,b,t) t=a;a=b;b=t;  
main()  
{int c,d,s;  
scanf("%d%d",&c,&d);  
CHANGE(c,d,s);  
printf("%d %d",c,d);  
}

C++ :

#include <iostream>
//#include <stdio.h>
//#include <conio.h>
#include <string>
//#include <math.h>
using namespace std;

int main()
{
	int a,b;
	cin >> b >> a;
	cout << a << " " << b;
	//_getch();
	return 0;
}

Java :

import java.util.Scanner;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input = new Scanner(System.in);
		int a = input.nextInt();
		int b = input.nextInt();
		a = a + b;
		b = a - b;
		a = a - b;
		System.out.println(a + " " + b);
		
	}

}

Python :

a = map(lambda x:int(x), raw_input().split())

print a[1],a[0]