12 lines · cpp
1#include "Circle.h"2 3Circle::Circle(double radius) : radius_(radius) {}4 5double Circle::area() const {6 return 3.141 * radius_ * radius_;7}8 9double Circle::perimeter() const {10 return 3.141 * radius_;11}12 1#include "Circle.h"2 3Circle::Circle(double radius) : radius_(radius) {}4 5double Circle::area() const {6 return 3.141 * radius_ * radius_;7}8 9double Circle::perimeter() const {10 return 3.141 * radius_;11}12