d_9_2.cpp

C++应用教程原码,里面包含该书中有十三章内容的代码,详细具体

#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;
class Time{
public:
	virtual void dispMessage()=0;  // 纯虚函数
	int hour,minute,second;
	void sTime(int h, int m, int s)
	{
	  hour = h;
	  minute = m;
	  second = s;
	}
};
class Morning : public Time {
public:
	void dispMessage()
	{  cout << "老板来了，赶紧干活！"<< endl;
	}
};
class Afternoon : public Time {
public:
	void dispMessage()
	{  cout << "还有半天，再接再厉！"<< endl;
	}
};
class Evening : public Time {
public:
	void dispMessage()
	{  cout << "好好放松一下，明天见！"<< endl;
	}
};
void main()
{	int h,m,s;
    Time *t;
    for (int i =0 ;i<3;++i)
	{ cout << "请输入当前时间:";
	  cin >> h >> m >> s;
	  if ((h>=8)&&(h<12))
	  { Morning morning;
	    morning.sTime(h,m,s);
	    t = &morning;
	  }
	  else if ((h>=12)&&(h<17))
		   { Afternoon afternoon;
	         afternoon.sTime(h,m,s);
	         t = &afternoon;
	       }
	      else if ((h>=17)&&(h<24))
				{ Evening evening;
					evening.sTime(h,m,s);
					t = &evening;
				}
		       else 
			   { cout << "请重新输入时间。";
		         continue;
			   }

	 t->dispMessage();
	 cin.get(); //等待结束，以便调测程序，可以删除
	}
}