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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. class Book
  6. {
  7. private:
  8.     string publisher;   // book publisher
  9.     string name;        // name of a book
  10.     int quantity;       // quantity of a book
  11.     double price;       // price of one book
  12. public:
  13.     Book(): publisher(""), name(""), quantity(1), price(0.0) { }
  14.     Book(string publish, string nam, int quantit, double pric): 
  15.         publisher(publish), name(nam), quantity(quantit), price(pric) { }
  16.     ~Book() { }
  17.  
  18.     void Set(string pu, string na, int qu, double pr);
  19.     void SetName(string pu);
  20.     void SetPrice(double pr);
  21.  
  22.     string GetPublisher() { return publisher; };
  23.     string GetName() { return name; };
  24.     int GetQuantity() { return quantity; };
  25.     double GetPrice() { return price; };
  26.  
  27.  
  28.     bool operator > (const Book & next);
  29.  
  30. };
  31.  
  32. void Book::Set(string pu, string na, int qu, double pr)
  33. {
  34.     publisher = pu;
  35.     name = na;
  36.     quantity = qu;
  37.     price = pr;
  38. }
  39.  
  40. void Book::SetName(string na)
  41. {
  42.     name= na;
  43. }
  44.  
  45. void Book::SetPrice(double pr)
  46. {
  47.     price = pr;
  48. }
  49.  
  50. bool Book::operator > (const Book & next)
  51. {
  52.     return (price > next.price);
  53. }
  54. //----------------------
  55.  
  56.  
  57. class Books
  58. {
  59. public:
  60.     static const int Cn = 100;  // maximum number of books
  61. private:
  62.     Book K[Cn]; // books data
  63.     int n;          // quantity of books
  64. public:
  65.     Books(): n(0) { }
  66.     ~Books() { }
  67.  
  68.     int Get() // returns quantity of books
  69.     { return n; };  
  70.  
  71.         void Set(Book newBook)  // add a new book to array of books 
  72.     { K[n++] = newBook; }       // and pluses one to quantity of books
  73.  
  74.     Book Get(int ind)   // returns object by index
  75.     { return K[ind]; }
  76.  
  77.     double Sum();
  78. };
  79.  
  80. double Books::Sum()
  81. {
  82.     double sum = 0;
  83.  
  84.     for (int i = 0; i < n; i++)
  85.         sum += K[i].GetPrice();
  86.     return sum;
  87. }
  88.  
  89. double MaxPrice(Books & A) // finds maximum price of a book
  90. {
  91. 	if(A.Get() == 0) return -1;
  92. 	Book curExpensiveBook = A.Get(0);
  93.     for (int i = 1; i < A.Get(); i++)
  94.     {
  95.         if(A.Get(i) > curExpensiveBook)
  96.         	curExpensiveBook = A.Get(i);
  97.     }
  98.     return curExpensiveBook.GetPrice();
  99. }
  100.  
  101.  
  102. int main() {
  103. 	// your code goes here
  104. 	Books collection;
  105. 	collection.Set(Book("John", "Book 1", 1, 10.0));
  106. 	collection.Set(Book("Jack", "Book 1", 1, 5.0));
  107. 	collection.Set(Book("John", "Book 1", 1, 20.0));
  108. 	printf("Max price: %f\n", MaxPrice(collection));
  109. 	return 0;
  110. }
Success #stdin #stdout 0s 3476KB
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Standard input is empty
stdout
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Max price: 20.000000
https://ideone.com/XYJBA2
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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