ZZULIOJ 1134: 字符串转换，Java

1134: 字符串转换

import java.util.Scanner;
public class Main {
    
    
    public static void main(String[] args) {
    
    
        Scanner cin = new Scanner(System.in);
        String str=cin.nextLine();
        int ans=0;
        for(int i=0;i<str.length();i++)
            if(str.charAt(i)>='0'&&str.charAt(i)<='9')
                ans=ans*10+str.charAt(i)-'0';
        System.out.println(ans*2);
    }
}