---

#include <iostream>
using namespace std;
struct MyTime {
public:
    int sec; int min; int hour;
    void IncSec()    {
        if (++sec == 60) { sec = 0; min++; }
        if (min == 60)   { min = 0; hour++; }
        if (hour == 24) { hour = 0; }
    }
};
int main()
{ //7:00:15, lunch 15:30:30 //supper 19:59
    MyTime mtBrkFst;//mtLunch, mtDinner
    mtBrkFst.min = mtBrkFst.sec = 59;
    mtBrkFst.hour = 23;
    cout << mtBrkFst.hour <<":" << mtBrkFst.min <<":" << mtBrkFst.sec << endl;
    mtBrkFst.IncSec();
    cout << (mtBrkFst.hour < 10 ? "0" : "") << mtBrkFst.hour << ":" << 
        (mtBrkFst.min < 10 ? "0" : "") << mtBrkFst.min << ":" << 
        (mtBrkFst.sec < 10 ? "0" : "") << mtBrkFst.sec << endl;


}