#include
#define PI 3.1415926
class Circle{
private:
double point_x,point_y;//圆心
double radius;//半径
public:
Circle(double initial_x = 0.0,double initial_y = 0.0,double initial_r = 1.0){
point_x = initial_x;
point_y = initial_y;
radius = initial_r;
}
Circle(){
}
double GetArea(){
return(PI*radius*radius);
}
double GetPerimeter(){
return(2*PI*radius);
}
};
void main(){
Circle myCircle = Circle(0,0,10);
cout