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# define M_PI 3.14159265358979323846
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int Shape::get_nshapes() {
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/* Move the shape to a new location */
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void Shape::move(double dx, double dy) {
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int Shape::nshapes = 0;
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void Circle::set_radius( double r ) {
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double Circle::area(void) {
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return M_PI*radius*radius;
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double Circle::perimeter(void) {
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double Square::area(void) {
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double Square::perimeter(void) {
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Circle *CircleFactory( double r ) {