第六周项目4-静态成员应用

来源：互联网发布：角度测量软件哪种好编辑：程序博客网时间：2024/05/16 16:18
#include<iostream>#include<cstdio>using namespace std;class time{public:    time(int=0,int=0,int=0);    void show_time();//根据is_24和from0，输出合适形式-20:23:5/8:23:5pm/08:23:05pm    void add_seconds(int x);//增加n秒钟    void add_minutes(int y);//增加n分钟    void add_hours(int z);//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false，12小时制，显示为8:23:5pm    static bool from0;//为true 时，前导0,8:23:5显示为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(from0)        {            if(hour<10)                cout<<"0"<<hour<<":";            else                cout<<hour<<":";            if(minute<10)                cout<<"0"<<minute<<":";            else                cout<<minute<<":";            if(sec<10)                cout<<"0"<<sec<<endl;            else                cout<<sec<<endl;        }}void time::add_hours(int z){    hour+=z;    if(hour>=24)    {        hour=hour%24;    }}void time::add_minutes(int y){    minute+=y;    if(minute>=60)    {        hour+=minute/60;        minute=minute%60;    }}void time::add_seconds(int x){    sec+=x;    if(sec>=60)    {        minute+=sec/60;        sec=sec%60;    }}void time::changefrom0(){    is_24=!is_24;}void time::change24(){    from0=!from0;}int main(){    time t1(23,14,25);    time t2(8,45,6);    cout<<"24时制，不前导0：\n";    t1.show_time();    t2.show_time();    cout<<"10小时后，切换是否前导0：\n";    t1.add_hours(10);    t2.add_hours(10);    time::change24();    cout<<"t1: ";    t1.show_time();    cout<<"t2: ";    t2.show_time();    cout<<"换一种时制：\n";    time::changefrom0();    cout<<"t1: ";    t1.show_time();    cout<<"t2: ";    t2.show_time();}
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