C++ 编写时间类Time

【问题描述】

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

【样例输入】

21 10 35
10 15 25
【样例输出】

07:26:00
21:10:34
10:15:27
07:26:01
21:10:32
10:15:29
【样例说明】

• 不要显示多余的提示信息，避免输出判定错误。
• 输出结束后不要输出任何内容，包括空格和换行。
• 注意判断输出信息是否符合要求。

 【完整代码如下】

#include 
#include 
using namespace std;
class Time
{
private:
    int hour;
    int minute;
    int second;
 
public:
    Time(int h = 0, int m = 0, int s = 0) : hour(h), minute(m), second(s){};
    Time(const Time &other) : hour(other.hour), minute(other.minute), second(other.second){};
    friend istream &operator>>(istream &input, Time &other)
    {
        input >> other.hour >> other.minute >> other.second;
        return input;
    }
    friend ostream &operator<<(ostream &output, const Time &other)
    {
        output << setw(2) << setfill('0') << other.hour << ":" << setw(2) << setfill('0') << other.minute << ":" << setw(2) << setfill('0') << other.second << endl;
        return output;
    }
    const Time operator++(int)
    {
        Time tmp(*this);
        int x = hour * 3600 + minute * 60 + second;
        x++;
        hour = x / 3600;
        x %= 3600;
        minute = x / 60;
        second = x % 60;
        return tmp;
    }
    const Time operator--(int)
    {
        Time tmp(*this);
        int x = hour * 3600 + minute * 60 + second;
        x--;
        hour = x / 3600;
        x %= 3600;
        minute = x / 60;
        second = x % 60;
        return tmp;
    }
    Time operator+=(const Time &other)
    {
        second += other.second;
        minute += other.minute;
        hour += other.hour;
        if (second >= 60)
        {
            minute += second / 60;
            second %= 60;
        }
        if (minute >= 60)
        {
            hour += minute / 60;
            minute %= 60;
        }
        if (hour >= 24)
        {
            hour %= 24;
        }
        return *this;
    }
    Time operator-=(const Time &other)
    {
        if(second
        {
            second += 60;
            second -= other.second;
            minute--;
        }
        else
        {
            second -= other.second;
        }
        if(minute
        {
            minute += 60;
            minute -= other.minute;
            hour--;
        }
        else
        {
            minute -= other.minute;
        }
        if(hour
        {
            hour += 24;
            hour -= other.hour;
        }
        else
        {
            hour -= other.hour;
        }      
       
        return *this;
    }
    Time& operator++()
    {
        int x = hour * 3600 + minute * 60 + second;
        x++;
        hour = x / 3600;
        x %= 3600;
        minute = x / 60;
        second = x % 60;
        return *this;
    }
    Time& operator--()
    {
        int x = hour * 3600 + minute * 60 + second;
        x--;
        hour = x / 3600;
        x %= 3600;
        minute = x / 60;
        second = x % 60;
        return *this;
    }
};
 
int main()
{
    Time t1, t2;
    cin >> t1;
    cin >> t2;
    cout << (t1 += (t2++));
    cout << (t1 -= t2);
    cout << ++t2;
    cout << (t2 += (t1--));
    cout << --t1;
    cout << (t2-=t1);
}