出自:2024年国家开放大学答案
class Rectangle { <p style="margin-left: 30px;">private int a,b; <p style="margin-left: 30px;">public Rectangle(int aa, int bb) {a=aa; b=bb;} <p style="margin-left: 30px;">public int area() {return a*b;} <p style="margin-left: 30px;">public int girth() {return 2*(a+b);}
}
public class XXK3 extends Rectangle { <p style="margin-left: 30px;">private int c; <p style="margin-left: 30px;">public XXK3(int aa, int bb, int cc) {super(aa,bb); c=cc;} <p style="margin-left: 30px;">public int volume() {return area()*c;} <p style="margin-left: 30px;">public int arrisLength() {return 2*girth()+4*c;}
<p style="margin-left: 30px;">public static void main(String args) { <p style="margin-left: 60px;">XXK3 x=new XXK3(2,3,4); <p style="margin-left: 60px;">int y1=x.volume(); <p style="margin-left: 60px;">int y2=x.arrisLength(); <p style="margin-left: 60px;">System.out.println(y1+", "+y2); <p style="margin-left: 30px;">}
}(单选题)
.24, 36.,.
34, 36