关于时间的计算

今天药忘吃喽~ 2022-01-29 10:45 243阅读 0赞

### 输入：T1= 11时:50分:40秒，T2= 12时:20分:20秒 ###

### 输出：T2-T1= 0时:29分:40秒 ###

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#include <iostream>
    #include <stdio.h>
    using namespace std;
    class Data
    {
    private:
        int hour;
        int minute;
        int second;
    
    public:
        Data(int phour =0,int pminute =0,int psecond =0):hour(phour),minute(pminute),second(psecond) {}
        friend Data operator-(const Data&T1,const Data&T2);
        friend ostream&operator<<(ostream&out,const Data&T);
        void showtime()const;
    };
    void Data::showtime()const
    {
        cout<<hour<<":"<<minute<<":"<<second<<endl;
    };
    Data operator-(const Data&T1,const Data&T2)
    {
        int ih, im, is;
        ih = T1.hour-T2.hour;
        im = T1.minute-T2.minute;
        is = T1.second-T2.second;
        if(is < 0)
        {
            is = 60 +is;
            im--;
        }
        if(im < 0)
        {
            im = 60 +im;
            ih--;
        }
        return Data(ih,im,is);
    }
    ostream & operator<<(ostream&out,const Data&T)
    {
        out<<T.hour<<"时"<<":"<<T.minute<<"分"<<":"<<T.second<<"秒"<<endl;
        return out;
    }
    int main()
    {
        Data T1(11,50,40),T2(12,20,20);
        Data T3;
        //T3.showtime();
        cout<<"T1= "<<T1<<endl;
        cout<<"T2= "<<T2<<endl;
        T3=T2-T1;
        cout<<"T2-T1= "<<T3<<endl;
        return 0;
    }

### 方法一： ###

Data operator-(const Data&T1,const Data&T2)
    {
        int ih, im, is, sum_sec;
        sum_sec=(T1.hour*3600+T1.minute*60+T1.second) - (T2.hour*3600+T2.minute*60+T2.second);
        ih = sum_sec/3600;
        im = sum_sec%3600/60;
        is = sum_sec%60;
        return Data(ih,im,is);
    }

### 方法二： ###

Data operator-(const Data&T1,const Data&T2)
    {
        int ih, im, is;
        ih = T1.hour-T2.hour;
        im = T1.minute-T2.minute;
        is = T1.second-T2.second;
    if(is < 0)
        {
            is = 60 +is;
            im--;
        }
        if(im < 0)
        {
            im = 60 +im;
            ih--;
        }
        return Data(ih,im,is);
    }