Class Rect

src/lecture/cpp/rect.cpp:4–12

#include <cstdio>

class Rect {
    public:
        Rect() : width(0), height(0) {}
        int area() { return width*height; }
        void set_vals(int w, int h);
    private:
        int width;
        int height;
};

void
Rect::set_vals(int w, int h)