Re: [問題] 請教 C++ 的基本問題

[einspon ()]

class Time {//第六行,forward declaration of 'class Time'
public:
        Time();         //第八行,invalid use of incomplete type 'class Time'
        void setTime(int, int, int);
        void printUniversal();
        void printStandard();

private:
        int hour;
        int minute;
        int second;
};

Time::Time(){
        hour = minute = second = 0;
}

void Time::setTime(int h, int m, int s) {
        hour = ((h>=0)&&(h<=23)?h:0);
        minute =  ((m>=0)&&(m<=59)?m:0);
        second =  ((s>=0)&&(s<=59)?s:0);
}

void Time::printUniversal() {
        cout << hour << ":"
                << minute << ":"
                << second << endl;
};

void Time::printStandard() {
        cout << ((hour == 0 || hour == 12) ? 12 : hour % 12)
             << ":" << minute
             << ":" << second
             << (hour < 12 ? "AM": "PM") << endl;
};

int main()
{   Time t;
    t.printUniversal();
    t.printStandard();
    t.setTime(23,59,59);
    t.printUniversal();
    t.printStandard();
    system("pause");
    return 0;
}

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