设计Circle圆类成员数据包含半径radius类型为double。根据给定的main函数设计必要的成员函数。main函数已给定提交时只需要提交main函数外的代码部分。#includeiostreamusing namespace std;你提交的代码在这里int main Circle c1; coutShow object c1endl; cout radius=c1

#include using namespace std;

class Circle{ private: double radius; public: Circle(double r=0){ radius=r; } double Get(){ return radius; } void Set(double r){ radius=r; } double Circumference(){ return 23.14radius; } double Square(){ return 3.14radiusradius; } };

int main() { Circle c1; cout<<"Show object c1:"<<endl; cout<<" radius="<<c1.Get()<<endl; cout<<" Circumference="<<c1.Circumference()<<endl; cout<<" Square="<<c1.Square()<<endl; double r; cin>>r; Circle c2(r); cout<<"Show object c2:"<<endl; cout<<" radius="<<c2.Get()<<endl; cout<<" Circumference="<<c2.Circumference()<<endl; cout<<" Square="<<c2.Square()<<endl; cin>>r; cout<<"Reset and Show object c1:"<<endl; c1.Set(r); cout<<" radius="<<c1.Get()<<endl; cout<<" Circumference="<<c1.Circumference()<<endl; cout<<" Square="<<c1.Square()<<endl; return 0;