#include #include using namespace std;

class time12 { private: bool pm; //true = pm, false = am int hrs; //1 to 12 int mins; //0 to 59 public: //no-arg constructor time12() : pm(true), hrs(0), mins(0) { }

    //3-arg constructor
    time12(bool ap, int h, int m) : pm(ap), hrs(h), mins(m)
    { }

    void display() const        //format: 11:59 p.m.
    {
        cout << hrs << ':';
        if(mins < 10)
            cout << '0';        //extra zero for "01"
        cout << mins << ' ';
        string am_pm = pm ? "p.m." : "a.m.";
        cout << am_pm;
    }

};

class time24 { private: int hours; //0 to 23 int minutes; //0 to 59 int seconds; //0 to 59 public: //no-arg constructor time24() : hours(0), minutes(0), seconds(0) { }

    time24(int h, int m, int s) : //3-arg constructor
    hours(h), minutes(m), seconds(s)
    { }

    void display() const
    //format: 23:15:01
    {
        if(hours < 10)
            cout << '0';
        cout << hours << ':';

        if(minutes < 10) 
            cout << '0';
        cout << minutes << ':';
        if(seconds < 10) 
            cout << '0';
        cout << seconds;
    }
    operator time12() const;
    //conversion operator

};

time24::operator time12() const //conversion operator { int hrs24 = hours; bool pm = hours < 12 ? false : true; //find am/pm //round secs int roundMins = seconds < 30 ? minutes : minutes+1; if(roundMins == 60) //carry mins? { roundMins=0; ++hrs24; if(hrs24 == 12 || hrs24 == 24) //carry hrs? pm = (pm==true) ? false : true; //toggle am/pm } int hrs12 = (hrs24 < 13) ? hrs24 : hrs24-12; if(hrs12==0) //00 is 12 a.m. { hrs12=12; pm=false; } return time12(pm, hrs12, roundMins); }

int main() { int h, m, s; while(true) { //get 24-hr time from user cout << "Enter 24-hour time: \n"; cout << " Hours (0 to 23): "; cin >> h; if(h > 23) //quit if hours > 23 return(1); cout << " Minutes (0 to 59): "; cin >> m; if(m > 59) return(1); cout << " Seconds (0 to 59): "; cin >> s; if(s > 59) return(1);

    time24 t24(h, m, s); //make a time24
    cout << "You entered: "; //display the time24
    t24.display(); 
    
    time12 t12 = t24; //convert time24 to time12
    //time12 t12 = static_cast<t12> t24; //convert time24 to time12        
    //display equivalent time12

    cout << "\n12-hour time: ";
    t12.display();
    cout << "\n\n";
}
return 0;

}