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/* File : example.c */
#include "example.h"
#include <math.h>
#ifndef M_PI
# define M_PI 3.14159265358979323846
#endif
int Shape::get_nshapes() {
return nshapes;
}
/* Move the shape to a new location */
void Shape::move(double dx, double dy) {
x += dx;
y += dy;
}
int Shape::nshapes = 0;
void Circle::set_radius( double r ) {
radius = r;
}
double Circle::area(void) {
return M_PI*radius*radius;
}
double Circle::perimeter(void) {
return 2*M_PI*radius;
}
double Square::area(void) {
return width*width;
}
double Square::perimeter(void) {
return 4*width;
}
Circle *CircleFactory( double r ) {
return new Circle(r);
}
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