JAVA：定义一个圆类Circle，成员变量：半径 radius

#include class Circle { public: Circle():m_radius(5){} Circle(int radius):m_radius(radius){} int getRadius(){return m_radius;} void Setradius(int radius){if(radius<1) radius=1; m_radius=radius;} int compareCircle(Circle &h) { return m_