Problem D: 时间类的12小时制输出

本文介绍了一个时间类的设计与实现,该类支持24小时制和12小时制的时间显示,并提供了多种时间设定与展示的方法。通过具体的代码示例,展示了如何创建时间对象、设置时间并进行不同格式的输出。

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Problem D: 时间类的12小时制输出

Time Limit: 4 Sec   Memory Limit: 128 MB
Submit: 3573   Solved: 1839
[ Submit][ Status][ Web Board]

Description

封装一个时间类Time,用于时间处理的相关功能,支持24小时制和12小时制,支持以下操作:
1. Time::Time()无参构造方法。
2. Time::Time(int,int,int)构造方法:传递时分秒的三个参数构造对象。
3. Time::Time(const T&)拷贝构造方法。
4. 成员读函数:
   Time::hour()  :返回Time的小时数;
   Time::minute():返回Time的分钟数;
   Time::second():返回Time的秒数。
5. 成员写函数:
   Time::hour(int)  :传参修改Time的小时数;
   Time::minute(int):传参修改Time的分钟数;
   Time::second(int):传参修改Time的秒数。
6. 对象整体读写方法:
   Time::setTime(int,int,int)方法:传递时分秒三个参数修改Time对象的时分秒数。该方法返回修改后的对象。
   Time::setTime(const T&)方法:传递一个参数修改Time对象的时分秒数。该方法返回修改后的对象。
   Time::getTime()方法:返回对象自身的引用。其实,t.getTime()即t。
   仅在Time类中的Time::getTime()方法实在是多余,在组合或者继承关系时才会有机会用到。
7. Time::inputTime()方法:按格式从标准输入读取数据修改Time对象的时分秒数值。该方法返回修改后的对象。
8. Time::showTime()方法:输出“hh:mm:ss”,不足两位的要前面补0。如果对象不是合法的时间,则输出“Time error”。
9. Time::showTime12Hour()方法:输出12小时制的时间:上午输出“hh:mm:ss a.m.”、下午输出“hh:mm:ss p.m.”。如果对象不是合法的时间,则输出“Time error”。注意:该函数仅显示12小时制时间,并不修改对象的数据成员,对象依然存储24小时制时间。
12小时制以数字12、1、2、3、4、5、6、7、8、9、10、11依次序表示每个时段的。
24小时制的00:00~00:59,是12小时制的12:00 a.m.~12:59 a.m.;
24小时制的1:00~11:59是十二小时制的1:00 a.m.~11:59 a.m.。
24小时制的12:00~12:59,是12小时制的12:00 p.m.~12:59 p.m.;
24小时制的13:00~23:59是十二小时制的1:00 p.m.~11:59 p.m.。
你设计一个时间类Time,使得main()函数能够正确运行。
函数调用格式见append.cc。
append.cc中已给出main()函数。main()函数内容稍微繁复,仅为测试对象的各种调用情况。

Input

输入的第一个整数n,表示有n组测试数据,每组3个整数:hh,mm,ss,分别表示时、分、秒,其值都在int范围内。

Output

开始部分为由main()函数产生的固定输出,用于测试对象的某些方法的调用情况。输出“Test data output :”之后为测试数据对应的输出:
每组测试数据对应一组输出,奇数行的输入对应输出24小时制时间“hh:mm:ss”,偶数行的输入对应输出12小时制时间:上午输出“hh:mm:ss a.m.”、下午输出“hh:mm:ss p.m.”,不足两位的输出需要前面补0。如果输入的时间不合法,则输出“Time error”。格式见sample。

Sample Input

60 0 10 59 591 1 6023 0 023 59 5924 1 0

Sample Output

Constant test output :11:59:58 a.m.12:00:01 p.m.11:59:5812:00:01Test data output :00:00:0112:59:59 a.m.Time error11:00:00 p.m.23:59:59Time error

HINT

输出格式用头文件<iomanip>中流操作算子:

setw(w)   :设置数据的输出宽度为w个字符

setfill(c):设置用字符c作为填充字符

Append Code

#include<iostream>
#include <iomanip>
using namespace std;
class Time
{
private:
    int h,m,s;
public:
    Time():h(0),m(0),s(0){}
    Time(int a,int b,int c):h(a),m(b),s(c){}
    Time(const Time &t):h(t.h),m(t.m),s(t.s){cout<<"There was a call to the copy constructor : "<<h<<","<<m<<","<<s<<endl;}
    int hour()const{return h;}
    int minute()const{return m;}
    int second()const{return s;}
    void hour(int a){h = a;}
    void minute(int b){m = b;}
    void second(int c){s = c;}

    Time& setTime(int a,int b,int c){h = a;m = b;s = c;return *this;}
    Time& setTime(const Time&t){h = t.h;m = t.m;s = t.s;return *this;}
    const Time& getTime()const{return *this;}///
    Time& inputTime(){cin>>h>>m>>s;return *this;}

    void showTime()const
    {
        if(h*3600+m*60+s>=24*3600||m>59||s>59||h<0||s<0||m<0)
            cout<<"Time error"<<endl;
       else cout<<setw(2)<<setfill('0')<<h<<":"<<setw(2)<<setfill('0')<<m<<":"<<setw(2)<<setfill('0')<<s<<endl;
    }
    void showTime12Hour()const
    {
        if(h*3600+m*60+s>=24*3600||m>59||s>59||h<0||s<0||m<0)
        cout<<"Time error"<<endl;
        else {
            if(h==0)
        {
            int a=hour();
            a=a+12;
            cout<<setw(2)<<setfill('0')<<a<<":"<<setw(2)<<m<<":"<<setw(2)<<s<<" a.m."<<endl;
        }
        else if(h>0&&h<12)
        {
            cout<<setw(2)<<setfill('0')<<h<<":"<<setw(2)<<m<<":"<<setw(2)<<s<<" a.m."<<endl;
        }
        else if(h==12)
        {
            cout<<setw(2)<<setfill('0')<<h<<":"<<setw(2)<<m<<":"<<setw(2)<<s<<" p.m."<<endl;
        }
        else if(h>12&&h<24)
        {
            int b=hour();
            b=b-12;
            cout<<setw(2)<<setfill('0')<<b<<":"<<setw(2)<<m<<":"<<setw(2)<<s<<" p.m."<<endl;
        }
        }

    }
};
int main()
{
    cout<<"Constant test output :"<<endl;
    const Time c(11, 59, 58);
    const Time cc(12, 0, 1);
    c.showTime12Hour();
    cc.showTime12Hour();
    c.showTime();
    cc.showTime();

    cout<<"\nTest data output :"<<endl;
    Time t;
    int cases;
    cin>>cases;
    for(int i = 1; i <= cases; ++i)
    {
        if(i % 4 == 0)
        {
            int hour, minute, second;
            cin>>hour>>minute>>second;
            Time tt(hour, minute, second);
            tt.showTime12Hour();
        }
        if(i % 4 == 1)
        {
            int hour, minute, second;
            cin>>hour>>minute>>second;
            t.setTime(hour, minute, second).showTime();
        }
        if(i % 4 == 2)
            t.inputTime().showTime12Hour();
        if(i % 4 == 3)
        {
            int hour, minute, second;
            cin>>hour>>minute>>second;
            t.hour(hour);
            t.minute(minute);
            t.second(second);
            t.showTime();
        }
    }
}

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08-09
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