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  1. // Attached: Lab_10_Part2
  2. // ===========================================================
  3. // File: Lab_10_Part2
  4. // ===========================================================
  5. // Programmer: Elaine Torrez
  6. // Class: CMPR 121
  7. // ===========================================================
  8.  
  9. #include <iostream>
  10. #include <string>
  11. using namespace std;
  12.  
  13. class Book
  14. {
  15. private:
  16.     string isbn;
  17.     int year;
  18.     double price;
  19.     static int bookCount;
  20.  
  21. public:
  22.     Book()
  23.     {
  24.         isbn = "";
  25.         year = 0;
  26.         price = 0.0;
  27.         bookCount++;
  28.     }
  29.  
  30.     Book(string bookIsbn, int bookYear, double bookPrice)
  31.     {
  32.         isbn = bookIsbn;
  33.         year = bookYear;
  34.         price = bookPrice;
  35.         bookCount++;
  36.     }
  37.  
  38.     ~Book()
  39.     {
  40.     }
  41.  
  42.     void displayBook() const
  43.     {
  44.         cout << "ISBN:  " << isbn << endl;
  45.         cout << "Year:  " << year << endl;
  46.         cout << "Price: " << price << endl;
  47.     }
  48.  
  49.     int getCount()
  50.     {
  51.         return bookCount;
  52.     }
  53.  
  54.     bool operator>(Book book)
  55.     {
  56.         return price > book.price;
  57.     }
  58.  
  59.     bool operator==(Book book)
  60.     {
  61.         return price == book.price;
  62.     }
  63.  
  64.     bool operator>(double amount)
  65.     {
  66.         return price > amount;
  67.     }
  68.  
  69.     double operator+(Book book)
  70.     {
  71.         return price + book.price;
  72.     }
  73.  
  74.     bool operator<(int amount)
  75.     {
  76.         return year < amount;
  77.     }
  78.  
  79.     friend ostream& operator<<(ostream& stream, Book& book);
  80.     friend istream& operator>>(istream& stream, Book& book);
  81. };
  82.  
  83. int Book::bookCount = 0;
  84.  
  85. ostream& operator<<(ostream& stream, Book& book)
  86. {
  87.     stream << "ISBN:  " << book.isbn << endl;
  88.     stream << "Year:  " << book.year << endl;
  89.     stream << "Price: " << book.price << endl;
  90.  
  91.     return stream;
  92. }
  93.  
  94. istream& operator>>(istream& stream, Book& book)
  95. {
  96.     cout << "ISBN:  ";
  97.     stream >> book.isbn;
  98.  
  99.     cout << "Year:  ";
  100.     stream >> book.year;
  101.  
  102.     cout << "Price: ";
  103.     stream >> book.price;
  104.  
  105.     return stream;
  106. }
  107.  
  108. int main()
  109. {
  110.     Book b1("0-12345-9", 1990, 12.50);
  111.     Book b2("0-54321-9", 2001, 7.75);
  112.     Book b3;
  113.     double avg;
  114.  
  115.     cout << "Here is book #1:\n";
  116.     b1.displayBook();
  117.  
  118.     cout << "\nHere is book #2:\n";
  119.     b2.displayBook();
  120.  
  121.     cout << "\nThere are " << b1.getCount() << " books.\n\n";
  122.  
  123.     if (b1 > b2)
  124.         cout << "Book #1 has a higher price.\n\n";
  125.     else
  126.         cout << "Book #1 does not have a higher price.\n\n";
  127.  
  128.     if (b1 == b2)
  129.         cout << "Same price.\n\n";
  130.     else
  131.         cout << "Not the same price.\n\n";
  132.  
  133.     if (b2 > 10.00)
  134.         cout << "The price is more than $10.00.\n\n";
  135.     else
  136.         cout << "The price is not more than $10.00.\n\n";
  137.  
  138.     avg = (b1 + b2) / 2.0;
  139.  
  140.     cout << "The average book price is " << avg << ".\n\n";
  141.  
  142.     if (b1 < 2000)
  143.         cout << "The book was published before 2000.\n\n";
  144.     else
  145.         cout << "The book was not published before 2000.\n\n";
  146.  
  147.     cout << b1;
  148.  
  149.     cout << "\nEnter Book #3 information.\n";
  150.     cin >> b1;
  151.  
  152.     cout << "\nHere is what you entered for Book #3:\n";
  153.     cout << b1;
  154.  
  155.     return 0;
  156. }
Success #stdin #stdout 0s 5324KB
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Standard input is empty
stdout
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Here is book #1:
ISBN:  0-12345-9
Year:  1990
Price: 12.5

Here is book #2:
ISBN:  0-54321-9
Year:  2001
Price: 7.75

There are 3 books.

Book #1 has a higher price.

Not the same price.

The price is not more than $10.00.

The average book price is 10.125.

The book was published before 2000.

ISBN:  0-12345-9
Year:  1990
Price: 12.5

Enter Book #3 information.
ISBN:  Year:  Price: 
Here is what you entered for Book #3:
ISBN:  0-12345-9
Year:  1990
Price: 12.5
https://ideone.com/cG3g8m
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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