第七周C++上级报告（静态成员应用）

/** 程序的版权和版本声明部分* Copyright (c)2012, 烟台大学计算机学院学生* All rightsreserved.* 文件名称： 时间———静态成员应用.cpp* 作者：王昕彤* 完成日期： 2013年 4  月 12  日* 版本号： v1.0* 输入描述：无* 问题描述：无* 程序输出：无*/#include <iostream>using namespace std;class Time{public:    Time(int=0,int=0,int=0);    void show_time( ); //根据is_24 和from0，输出适合形式-20:23:5/8:23:5 pm/08:23:05 pm    void add_seconds(int); //增加n 秒钟    void add_minutes(int); //增加n 分钟    void add_hours(int); //增加n 小时    static void change24(); //改变静态成员is_24，在12 和24 时制之间转换    static void changefrom0(); //改变静态成员from0，切换是否前导0private:    static bool is_24; //为true 时，24 小时制，如20:23:5；为flase，12 小时制，显示为8:23:5 pm    static bool from0; //为true 时，前导0，8:23:5 显示为08:23:05    int hour;    int minute;    int sec;};//下面写出静态成员的初始化及各成员函数的定义……int main( ){    cout<<"24小时制，前导0："<<endl;    Time t1(23,14,25),t2(8,45,6);    t1.show_time();    t2.show_time();    cout<<"12小时制，前不导0:"<<endl;    t2.change24();    t2.changefrom0();    t2.show_time();    cout<<"10小时后，切换是否导0："<<endl;    Time::changefrom0();    t1.add_hours(10);    t1.show_time();    return 0;}Time::Time(int h,int m,int s){    hour=h;    minute=m;    sec=s;}void Time::show_time( ){    if(is_24==0&&from0==0)    {        if(hour>12)        {            hour=hour%12;            cout<<hour<<":"<<minute<<":"<<sec<<endl;        }        else        {            cout<<hour<<":"<<minute<<":"<<sec<<endl;        }    }    if(is_24==1&&from0==1)    {        if(hour<10&&minute<10&&sec<10)            cout<<"0"<<hour<<":"<<"0"<<minute<<":"<<"0"<<sec<<endl;        else if(hour<10&&minute<10)            cout<<"0"<<hour<<":"<<"0"<<minute<<":"<<sec<<endl;        else if(minute<10&&sec<10)            cout<<hour<<":"<<"0"<<minute<<":"<<"0"<<sec<<endl;        else if(hour<10&&sec<10)            cout<<"0"<<hour<<":"<<minute<<":"<<"0"<<sec<<endl;        else if(hour<10)            cout<<"0"<<hour<<":"<<minute<<":"<<sec<<endl;        else if(minute<10)            cout<<hour<<":"<<"0"<<minute<<":"<<sec<<endl;        else if(sec<10)            cout<<hour<<":"<<minute<<":"<<"0"<<sec<<endl;    }    if(is_24==1&&from0==0)    {        cout<<hour<<":"<<minute<<":"<<sec<<endl;    }    if(is_24==0&&from0==1)    {        cout<<"0"<<hour%12<<":"<<minute<<":"<<sec<<" pm"<<endl;    }    else if(hour<12&&hour>=10)        cout<<hour%12<<":"<<minute<<":"<<sec<<" am"<<endl;    else if(hour<10)        cout<<"0"<<hour<<":"<<minute<<":"<<sec<<" am"<<endl;}void Time::add_seconds(int s){    sec+=s;    while(sec>60)    {        sec-=60;        ++minute;    }    while(minute>60)    {        minute-=60;        ++hour;    }    while(hour>24)    {        hour-=24;    }}void Time::add_minutes(int m){    minute+=m;    while(minute>60)    {        minute-=60;        ++hour;    }    while(hour>24)    {        hour-=24;    }}void Time::add_hours(int h){    hour+=h;    while(hour>24)    {        hour-=24;    }}void Time::change24(){    if(is_24=1)    {        is_24=0;    }    else    {        is_24=1;    }}void Time::changefrom0(){    if(from0=1)    {        from0=0;    }    else    {        from0=1;    }}bool Time::is_24=1;                 bool Time::from0=1;

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