6 # define M_PI 3.14159265358979323846
9 int Shape::get_nshapes() {
13 /* Move the shape to a new location */
14 void Shape::move(double dx, double dy) {
19 int Shape::nshapes = 0;
21 void Circle::set_radius( double r ) {
25 double Circle::area(void) {
26 return M_PI*radius*radius;
29 double Circle::perimeter(void) {
33 double Square::area(void) {
37 double Square::perimeter(void) {