共回答了11个问题采纳率：90.9%
class Circle{
protected double radius;
public Circle(){
radius=0;
}
public Circle(double radius) {
this.radius = radius;
}
public double getRadius() {
return radius;
}
public void setRadius(double radius) {
this.radius = radius;
}
public double area(){
return 3.14*radius*radius;
}
}
class Cyliinder extends Circle{
protected double height;
public Cyliinder(){
height=0;
}
public Cyliinder(double radius,double height) {
super(radius);
this.height = height;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double volume(){
return area()*height;
}
}
public class Test {
public static void main(String[] args) {
//假设半径为3,高为5
Cyliinder c1=new Cyliinder(3,5);
//输出半径
System.out.println(c1.getRadius());
//输出高
System.out.println(c1.getHeight());
//输出体积
System.out.println(c1.volume());
}
}
1年前
5