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  1. #include <iostream>
  2. #include <string>
  3.  
  4. ///////////////////////////////////////////////////////////////////////////////
  5.  
  6. class Publication 
  7. {
  8.     private:
  9.         std::string title;
  10.         float price;
  11.  
  12.     public:
  13.         virtual void set_data() 
  14.         {
  15.             std::cout << "\n Enter title: "; std::cin >> title;
  16.             std::cout << " Enter price: ";  std::cin >> price;
  17.         }
  18.         virtual void show_data()const
  19.         {
  20.             std::cout << "\n title: " << title;
  21.             std::cout << "\n price: " << price << " $";
  22.         }
  23.  
  24.  
  25. };
  26.  
  27. //-----------------------------------------------------------------------------
  28.  
  29. class Book : public Publication
  30. {
  31.     private:
  32.         int pages;
  33.  
  34.     public:
  35.         void set_data()
  36.         {
  37.             Publication::set_data();
  38.             std::cout << " Set book pages: "; std::cin >> pages;
  39.         }
  40.         void show_data()
  41.         {
  42.             Publication::show_data();
  43.             std::cout << "\n pages: " << pages << std::endl;
  44.         }
  45. };
  46.  
  47. //-----------------------------------------------------------------------------
  48.  
  49. class Tape : public Publication
  50. {
  51.     private:
  52.         float time;
  53.  
  54.     public:
  55.         void set_data()
  56.         {
  57.             Publication::set_data();
  58.             std::cout << " Set tape time: "; std::cin >> time;
  59.         }
  60.         void show_data()
  61.         {
  62.             Publication::show_data();
  63.             std::cout << "\n time: " << time << " min" << std::endl;
  64.         }
  65.  
  66. };
  67.  
  68. ///////////////////////////////////////////////////////////////////////////////
  69.  
  70. int main()
  71. {
  72.     Publication* pubarr[100];
  73.  
  74.     int n = 0;
  75.     char chose;
  76.  
  77.     do {
  78.         std::cout << "Enter data for book or tape (b/t)?"; std::cin >> chose;
  79.  
  80.         if (chose == 'b') 
  81.             { pubarr[n] = new Book; } 
  82.         else 
  83.             { pubarr[n] = new Tape; }
  84.  
  85.         pubarr[n++]->set_data();
  86.  
  87.         std::cout << "\n Again (y/n)?"; std::cin >> chose;
  88.     } while (chose == 'y');
  89.  
  90.     for (int i = 0; i < n; i++) {
  91.         pubarr[i]->show_data();
  92.     }
  93.  
  94.     return 0;
  95. }
  96.  
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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Standard input is empty
stdout
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Enter data for book or tape (b/t)?
 Enter title:  Enter price:  Set tape time: 
 Again (y/n)?
 title: 
 price: 0 $
https://ideone.com/hfbrbS
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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