1*70ec8419SPeterChou1 #include "Circle.h" 2*70ec8419SPeterChou1 Circle(double radius)3*70ec8419SPeterChou1Circle::Circle(double radius) : radius_(radius) {} 4*70ec8419SPeterChou1 area() const5*70ec8419SPeterChou1double Circle::area() const { 6*70ec8419SPeterChou1 return 3.141 * radius_ * radius_; 7*70ec8419SPeterChou1 } 8*70ec8419SPeterChou1 perimeter() const9*70ec8419SPeterChou1double Circle::perimeter() const { 10*70ec8419SPeterChou1 return 3.141 * radius_; 11*70ec8419SPeterChou1 }