* 程序的版權和版本聲明部分
* Copyright (c) 2011, 煙臺大學計算機學院學生
* All rights reserved.
* 文件名稱: 第七週 任務一
* 作 者: 楊森
* 完成日期: 2012 年 4 月 3 日
* 版 本 號: V1.0
源程序:
#include <iostream>
#include<iomanip>
using namespace std;
class Time
{
public:
Time(int=0,int=0,int=0);
void show_time( ); //根據is_24和from0,輸出適合形式-20:23:5/8:23:5 pm/08:23:05 pm
void add_seconds(int); //增加n秒鐘
void add_minutes(int); //增加n分鐘
void add_hours(int); //增加n小時
static void change24(); //改變靜態成員is_24,在12和24時制之間轉換
static void changefrom0(); //改變靜態成員from0,切換是否前導0
private:
static bool is_24; //爲true時,24小時制,如20:23:5;爲flase,12小時制,顯示爲8:23:5 pm
static bool from0; //爲true時,前導0,8:23:5顯示爲08:23:05
int hour;
int minute;
int sec;
};
bool Time::is_24 = true;
bool Time::from0 = false;
Time::Time(int h,int m ,int s)
{
hour = h;
minute = m;
sec = s;
}
void Time::show_time( )
{
if(is_24 == true)
{
if(from0 == true)
{
cout << setfill('0') << setw(2) << hour << ":" << setfill('0') << setw(2) << minute << ":" << setfill('0') << setw(2) << sec << endl;
}
else
{
cout << hour << ":" << minute << ":" << sec << endl;
}
}
else
{
char c = 'a';
if(hour > 12)
{
c = 'p';
hour = hour - 12;
}
if(from0 == true)
{
cout << setfill('0') << setw(2) << hour << ":" << setfill('0') << setw(2) << minute << ":" << setfill('0') << setw(2) << sec << " " << c << "m" << endl;
}
else
{
cout << hour << ":" << minute << ":" << sec << endl;
}
}
}
void Time::add_seconds(int n)
{
minute = minute + ((sec + n) / 60);
sec = (sec + n) / 60;
}
void Time::add_minutes(int n)
{
hour = hour + (( minute + n) / 60);
minute = (minute + n) / 60;
}
void Time::add_hours(int n)
{
if((hour + n) < 24)
{
hour = hour + n;
}
else
{
hour = hour + n - 24;
}
}
void Time::change24()
{
if(Time::is_24 == true)
{
Time::is_24 = false;
}
}
void Time::changefrom0()
{
if(Time::from0 == false)
{
Time::from0 = true;
}
}
int main( )
{
Time t1(23,14,25),t2(8,45,6);
cout << "24時制, 不前導0:" <<endl;
cout<<"t1是:";
t1.show_time();
cout << "t2是:";
t2.show_time();
t1.add_hours(10);
t2.add_hours(10);
Time::changefrom0(); //注意此處調用靜態成員
cout << "10小時後, 切換是否前導0:" <<endl;
cout<< "t1是:";
t1.show_time();
cout << "t2是:";
t2.show_time();
t1.change24();
cout << "換一種制式:" <<endl;
cout << "t1是:";
t1.show_time();
cout << "t2是:";
t2.show_time();
//system("pause");
return 0;
}
運行結果:
小感:就是 show_time() 函數不好搞啊···