// Based on Skansholm pages 216..229
#include <iostream>
#include <iomanip>
#include <cassert>

using namespace std;

class Clock
{
  public:
    Clock():h(0),m(0),s(0){}
    Clock(int hour, int min, int sec): h(hour%24),m(min%60),s(sec%60){}


    void set(int hour, int min, int sec) { h=hour%24; m=min%60; s=sec%60; }

    void tick();
    void write( bool write_sec = true );
 

  private:
    int h,m,s;
};

void Clock::tick()
{
    s = (s+1 ) % 60;
    if(s==0)
    {
        m=(m+1)%60;
        if(m==0)
          h = (h+1)%24;
    }
}
void Clock::write( bool write_sec )
{
   cout << setw(2) <<setfill('0') <<h
        << ":" << setw(2) <<setfill('0') <<m;
   if(write_sec)
        cout << ":" << setw(2) <<setfill('0') <<s;
} 


main ()
{
   Clock c;
   int hh, mm, ss;
   cout << "Set the Clock!"<< endl
        << "Indicate the hour, min, and sec" << endl;
   cin >> hh>> mm>> ss;

   c.set(hh,mm,ss);

   cout <<"How many ticks? "; cin >> ss;
   for (int i =1; i<=ss; i++)
   {
      c.tick();
   }

   cout << "The time is now "; c.write(); cout << endl;

}