1 #ifndef CLOCK_H_INCLUDED
 2 #define CLOCK_H_INCLUDED
 3 using namespace std;
 4 
 5 class Clock
 6 {
 7     public:
 8         Clock (int h,int m,int s):h(h),m(m),s(s){};
 9         void settime(int h,int m,int s);
10         void showtime();
11     private:
12         int h;
13         int m;
14         int s;
15     };
16 
17 #endif // CLOCK_H_INCLUDED

 1 #include <iostream>
 2 #include"clock.h"
 3 using namespace std;
 4 
 5 void Clock::settime(int h,int m,int s )
 6 {
 7     this->h=h;
 8     this->m=m;
 9     this->s=s;
10 }
11 
12 void Clock::showtime()
13 {
14     cout<<" h="<<h<<" m="<<m<<" s="<<s<<endl;
15 }

 1 #include <iostream>
 2 #include"clock.h"
 3 using namespace std;
 4 
 5 int main()
 6 {
 7     cout << "Hello world!" << endl;
 8     Clock clock(0,0,0);
 9     clock.showtime();
10     cout<<"enter"<<endl;
11     int h,m,s;
12     cin>>h>>m>>s;
13     clock.settime(h,m,s);
14     clock.showtime();
15 
16     return 0;
17 }