C :

#include<stdio.h>
void main(){
	int a,b,t;
	scanf("%d%d",&a,&b);
	if(a>b){
		t = a;
		a = b;
		b = t;
	} 
	printf("%d %d",a,b);
}

C++ :

#include <iostream>
using namespace std;
int main(){
	int a,b,t;
	cin>>a>>b;
	//如果a > b，交换ab
	if(a > b){
		t = a;
		a = b;
		b = t;
	}
	cout<<a<<" "<<b<<endl;
}

Pascal :

var
 a,b:longint;
begin
  read(a,b);
  if a<b then write(a,' ',b)
         else write(b,' ',a);
end.

Java :

import java.util.*;
public class Main
{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int t = 0;
		if (a>b)
		{	t=a;
			a=b;
			b=t;
		}
		System.out.print(a+" "+b);
	}
}

Python :

a,b = map(int,input().split() ) 
if a>b:
    print(b,a)
elif b>a:
    print(a,b)