例题 设计一个求圆面积的类

package com.atguigu.java;

public class TestCircle {
public static void main(String[] args) {
Circle a = new Circle();
a.r = 2.00;
System.out.println(a.s());
}

}
class Circle{
double r;
public double s() {
return rr3.14;
}
}

标签：double,class,设计,Circle,例题,圆面积,public
来源： https://blog.csdn.net/weixin_38914772/article/details/100160035