第二次C++作业

来源：互联网发布：java中log 编辑：程序博客网时间：2024/05/22 01:59
#include <iostream>  using namespace std;  class Time  {  public:  void set_time( );void show_time( ); void add_a_sec()  //增加1秒钟{sec++;while(sec>59)sec=0;minute++;while(minute>59)minute=0;hour++;}void add_a_minute() //增加1分钟{minute++;while(minute>59)minute=0;hour++;}void add_an_hour() //增加1小时{hour++;}void add_seconds(int a); //增加n秒钟void add_minutes(int b); //增加n分钟void add_hours(int c); //增加n小时private:   bool is_time(int, int, int);   //这个成员函数设置为私有的，是合适的，请品味  int hour;  int minute;  int sec;  };  void Time::set_time( )   {      char c1,c2;      cout<<"请输入时间(格式hh:mm:ss)";      while(1)      {   cin>>hour>>c1>>minute>>c2>>sec;          if(c1!=':'||c2!=':')              cout<<"格式不正确，请重新输入"<<endl;          else if (!is_time(hour,minute,sec))              cout<<"时间非法，请重新输入"<<endl;          else               break;      }  } void Time::add_seconds(int a) //增加n秒钟{//int a;sec+=a;for(sec;sec>59;sec-=60)       {            minute++;            sec=sec%60;        }         for(minute;minute>59;minute-=60)            {                hour++;                minute=minute%60;            }}void Time::add_minutes(int b) //增加n分钟{    //int b;    minute+=b;    for(minute;minute>59;minute-=60)        {            hour++;            minute=minute%60;        }}void Time::add_hours(int c)//增加n小时{    //int c;    hour+=c;}void Time::show_time( )        {      cout<<hour<<":"<<minute<<":"<<sec<<endl;  }  bool Time::is_time(int h,int m, int s)  {      if (h<0 ||h>24 || m<0 ||m>60 || s<0 ||s>60)          return false;      return true;  }  int main( )  {      Time t1;    t1.set_time( );t1.add_a_minute();t1.add_a_sec();t1.add_an_hour();t1.add_seconds(a);t1.add_minutes(b);t1.add_hours(c);         t1.show_time( );      return 0;  }
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