编写一个程序，定义一个时间类Time，包含三个属性： hour, minute 和 second 要求通过运算符重载实现如下功能: 时间输入输出(>>、<<)； 时间增加减少若干(+=、-=)，例：Time& operator+=(const Time&);Time& operator-=(const Time&)； 时间前、后自增加/减少1秒(++、--)，前自增例：Time& operator++(); 后自增例：Time operator++(int)； 【输入形式】 输入固定为两个Time实例(time1，time2),每个实例占一行； Time实例输入格式为：hour minute second。 【输出形式】 Time实例输出格式为：hour:minute:second； 每个输出实例占一行。 依次输出以下表达式的值 time1 += (time2++) time1 -= time2 ++time2 time2 += (time1--) --time1 time2 -= time1

+ 10；时间与整数相乘( * )，例：Time * 2；时间比较大小( <、> )。能否给出代码示例？

好的，以下是时间类Time的代码示例：

#include<iostream>
using namespace std;

class Time {
    friend ostream& operator<<(ostream&, const Time&);
    friend istream& operator>>(istream&, Time&);

public:
    Time(int h = 0, int m = 0, int s = 0) {
        hour = h;
        minute = m;
        second = s;
    }

    Time& operator+=(int s) {
        second += s;
        minute += second / 60;
        second %= 60;
        hour += minute / 60;
        minute %= 60;
        return *this;
    }

    Time& operator-=(int s) {
        second -= s;
        if (second < 0) {
            second += 60;
            minute--;
        }
        minute -= second / 60;
        if (minute < 0) {
            minute += 60;
            hour--;
        }
        hour -= minute / 60;
        if (hour < 0) {
            hour += 24;
        }
        return *this;
    }

    Time operator+(int s) const {
        Time t(*this);
        return t += s;
    }

    Time operator-(int s) const {
        Time t(*this);
        return t -= s;
    }

    Time operator*(int s) const {
        Time t(*this);
        int total = ((hour * 60 + minute) * 60 + second) * s;
        t.second = total % 60;
        total /= 60;
        t.minute = total % 60;
        total /= 60;
        t.hour = total % 24;
        return t;
    }

    bool operator<(const Time& t) const {
        if (hour != t.hour) {
            return hour < t.hour;
        }
        else if (minute != t.minute) {
            return minute < t.minute;
        }
        else {
            return second < t.second;
        }
    }

    bool operator>(const Time& t) const {
        return t < *this;
    }

private:
    int hour, minute, second;
};

ostream& operator<<(ostream& os, const Time& t) {
    os << t.hour << ":" << t.minute << ":" << t.second;
    return os;
}

istream& operator>>(istream& is, Time& t) {
    is >> t.hour >> t.minute >> t.second;
    return is;
}

int main() {
    Time t1(8, 10, 0), t2(22, 45, 30);
    Time t3;
    int s = 3600;

    cout << "t1 is " << t1 << endl;
    cout << "t2 is " << t2 << endl;
    cout << "Enter a time (hour minute second):";
    cin >> t3;
    cout << "You entered " << t3 << endl;

    t1 += s;
    cout << "t1 after adding " << s << " seconds is " << t1 << endl;

    t2 -= s;
    cout << "t2 after subtracting " << s << " seconds is " << t2 << endl;

    Time t4 = t3 * 3;
    cout << "t3 * 3 is " << t4 << endl;

    if (t1 < t2) {
        cout << "t1 is earlier than t2" << endl;
    }
    else {
        cout << "t1 is later than t2" << endl;
    }

    return 0;
}