C :

#include<stdio.h>
int main()
{
	int a;
	scanf("%d",&a);
	printf("%d",a+a%10+a/10%10+a/100%10+a/1000);
	return 0;
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	cin>>n;
	int q = n / 1000;
	int b = n / 100 % 10;
	int s = n / 10 % 10;
	int g = n % 10;
	cout<<n + q + b + s + g;
}

Java :

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int x = sc.nextInt();
		int g = x % 10 ;
		int s = x / 10 % 10 ;
		int b = x / 100 % 10;
		int q = x / 1000;
		int sum = g + s + b + q ;
		int sum1 = sum + x;
		System.out.println(sum1);
	}
}

Python :

a=int(input())
b=a//1000
c=a//100%10
d=a//10%10
e=a%10
print(a+b+c+d+e)