从0-1000任意选择求各位数字的和

package kljjj;

public class kljjjj {
    public static void main(String[] args) {    
        int x=0023;
        int a,b,c,d,sum;
        a=x/1000;
        b=x/100%10;
        c=x/10%10;
        d=x%10;
        sum=a+b+c+d;
    System.out.println("jieguoshi"+sum);
    }
}