package gg;

public class Ellipse extends Circle{//繼承Circle類(lèi)
	private double a;//聲明變量
	private double b;
	public Ellipse(double a, double b) {//構(gòu)造方法
		super(a);//從父類(lèi)繼承
		this.a = super.getA();//從父類(lèi)的getA()函數(shù)得到a
		this.b = b;
	}
	public double getA() {//讀取短a半徑
	return a;
	}
	public void setA(double a) {//設(shè)置短半徑
		this.a = a;
}
	public double getB() {//讀取長(zhǎng)半徑
		return b;
	}
	public void setB(double b) {//設(shè)置長(zhǎng)半徑
		this.b = b;
	}
	public double calculateArea(){//覆蓋父類(lèi)中的calculateArea()方法，計(jì)算橢圓的面積
		double area=0;
		area=Math.PI*a*b;
		return area;
	}
}