C :

#include<stdio.h>

int main()
{
	int n,t,s,a=0;
	while(scanf("%d",&n)!=EOF)
	{
		if(a++)
			printf("\n");
		s=0;
		while(1)
		{
			t=n%10;
			if(t%2==0)
				s+=t;
			n/=10;
			if(n==0)
				break;
		}
		printf("%d\n",s);
	}
	return 0;
}

C++ :

#include<stdio.h>

int main()
{
	int n,t,s,a=0;
	while(scanf("%d",&n)!=EOF)
	{
		if(a++)
			printf("\n");
		s=0;
		while(1)
		{
			t=n%10;
			if(t%2==0)
				s+=t;
			n/=10;
			if(n==0)
				break;
		}
		printf("%d\n",s);
	}
	return 0;
}

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		while(in.hasNext()){
			char[] cs = in.nextLine().toCharArray();
			int cou = 0;
			for(char c:cs)
				if(c%2==0)
					cou+=c-48;
			System.out.println(cou);
			System.out.println();
		}
	}

}