circle.cpp
// Solution to Exercise 29 // (NDE, 2014-02-13) #include #include "circle.hpp" Circle::Circle(double x, double y, double r) { centre_x = x; centre_y = y; radius = r; } double Circle::get_x() const { return centre_x; } double Circle::get_y() const { return centre_y; } double Circle::get_radius() const { return radius; } double Circle::area() const { return M_PI*radius*radius; } double Circle::circumference() const { return 2*M_PI*radius; }