#ifndef __my_lib_hpp
#define __my_lib_hpp

#define MY_LIB_DEFINE 0

namespace MY_LIB {

class my_lib_rect {
    int width_, height_;
public:
    my_lib_rect(int width, int height);

    virtual int area() const;
};

int my_lib_fn();
int my_lib_fn(int x);

}

#endif