#includeusing namespace std; class Circle { public: Circle() { cout<<"第一个构造函数"<<"n"< x=x; this->y=y; this->radius=radius; cout<<"第二个构造函数"<<"n"<

#includeusing namespace std; class Circle { public: Circle() { cout<<"第一个构造函数"<<"n"< x=x; this->y=y; this->radius=radius; cout<<"第二个构造函数"<<"n"<