程序执行的结果是:()。 01 public class Answer { 02 public static void main(String[] args) { 03 int score = 20; 04 Answer ans= new Answer(); 05 ans.add(score); 06 System.out.println(" main: score = " + score); 07 } 08 void add(int score) { 09 System.out.println(" add: score=" + score++); 10 }