[单选题]abstract class Shape {int a,b;public Shape(int aa, int bb) {a=aa;b=bb;}abstract public double area（ ）;}class Rectangle extends Shape {public Rectangle(int aa, int bb) {super(aa,bb);}public double area（ ） {return a*b;}}class Triangle extends Shape {public Triangle(int aa, int bb) {super(aa,bb);}public double area（ ） {return a*b/2;}}public class XXK3 {public static void main(String[] args) {Shape x,y; x=new Rectangle(5,8);y=new Triangle(5,8);System.out.println(x.area（ ）+, +y.area（ ）);}}程序运行的结果是 （ ）。
北开题库
|
2023-10-01 08:00:19
|
15
[单选题]abstract class Shape {int a,b;public Shape(int aa, int bb) {a=aa;b=bb;}abstract public double area（ ）;}class Rectangle extends Shape {public Rectangle(int aa, int bb) {super(aa,bb);}public double area（ ） {return a*b;}}class Triangle extends Shape {public Triangle(int aa, int bb) {super(aa,bb);}public double area（ ） {return a*b/2;}}public class XXK3 {public static void main(String[] args) {Shape x,y; x=new Rectangle(5,8);y=new Triangle(5,8);System.out.println(x.area（ ）+, +y.area（ ）);}}程序运行的结果是 （ ）。

A.10.0，96.0
B.24.0, 36.0
C.30.0，36.0
D.40.0,20.0
查看答案

国家开放大学

形成性考核

您可能感兴趣的试题
TOP