C :

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

C++ :

#include <bits/stdc++.h>
using namespace std;

int main(){
    int a,b,c,d,t;
    cin>>a>>b>>c>>d;
    if(a > b){
    	t = a;
    	a = b; 
    	b = t;
	}
	if(a > c){
    	t = a;
    	a = c; 
    	c = t;
	}
	if(a > d){
    	t = a;
    	a = d; 
    	d = t;
	}
	if(b > c){
    	t = b;
    	b = c; 
    	c = t;
	}
	if(b > d){
    	t = b;
    	b = d; 
    	d = t;
	}
	if(c > d){
    	t = c;
    	c = d; 
    	d = t;
	}
	if(a > b){
    	t = a;
    	a = b; 
    	b = t;
	}
	
	cout<<d<<" "<<c<<" "<<b<<" "<<a<<endl;
}

Java :

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