ex9_1.cpp

《C++面对对象程序设计》的所有源代码和部分头文件

// ex9_1.cpp
// publication class and derived classes
#include <iostream>
#include <string>
using namespace std;
////////////////////////////////////////////////////////////////
class publication                     // base class
   {
   private:
      string title;
      float price;
   public:
      void getdata()
         {
         cout << "\nEnter title: "; cin >> title;
         cout << "Enter price: "; cin >> price;
         }
      void putdata() const
         {
         cout << "\nTitle: " << title;
         cout << "\nPrice: " << price;
         }
   };
////////////////////////////////////////////////////////////////
class book : private publication      // derived class
   {
   private:
      int pages;
   public:
      void getdata()
         {
         publication::getdata();
         cout << "Enter number of pages: "; cin >> pages;
         }
      void putdata() const
         {
         publication::putdata();
         cout << "\nPages: " << pages;
         }
   };
////////////////////////////////////////////////////////////////
class tape : private publication      // derived class
   {
   private:
      float time;
   public:
      void getdata()
         {
         publication::getdata();
         cout << "Enter playing time: "; cin >> time;
         }
      void putdata() const
         {
         publication::putdata();
         cout << "\nPlaying time: " << time;
         }
   };
////////////////////////////////////////////////////////////////
int main()
   {
   book book1;                        // define publications
   tape tape1;

   book1.getdata();                   // get data for them
   tape1.getdata();

   book1.putdata();                   // display their data
   tape1.putdata();
   cout << endl;
   return 0;
   }