读程序，写结果（ ）

public class AddTest{

public static void main(String args[]){

int t;

Value2 no=new Value2(10,20);

t=no.x+no.y;

System.out.println(“add=”+t);

}

}



class Value1{

int x,y;

Value1(int a, int b){

x=a+10;

y=b;

}

}

class Value2 extends Value1{

Value2(int a, int b){

super(a,b);

}

}