원넓이 버전투

Circle ver_2.cpp

#include<iostream>
#include<string>
using namespace std;

class Circle
{
private:
        double r, area;
public:
        Circle(){r=0;}
        void setRadius(int i){r=i;}
        void calcArea(){area=r*r*3.14;}
        void print(){cout<<"반지름 : "<<r<<" , 넓이 : "<<area<<endl;}
};

void main()
{
        int i;
        Circle cr[3];
        for(i=0;i<3;i++)
        {
        cr[i].setRadius(i);
        cr[i].calcArea();
        cr[i].print();
        }
}