//ex4-5.cpp//clock.hclass clock{private:int hour,minute,second;public:void init();void update(); unsigned display;};//clock.cpp#include
#include"clock.h"void clock::init(){hour=minute=second=0;}void clock::update(){second++;if (second==60){second=0;minute++;}if (minute==60){minute=0;hour++;}if (hour==24){hour=0;}void clock::display(){cout<