You are developing a library management system in C++. The system allows users to borrow and return books. Each book has a title, author, and a unique book ID. The library system uses a class called Book to represent each book.Question: Implement the necessary operator overloading functions in the Book class to compare two books based on their book IDs. The comparison should allow you to determine whether one book is greater than, less than, or equal to another book based on their IDs.Provide the necessary code for the Book class, including the member variables and the operator overloading functions for the comparison operators.
Question
You are developing a library management system in C++. The system allows users to borrow and return books. Each book has a title, author, and a unique book ID. The library system uses a class called Book to represent each book.Question: Implement the necessary operator overloading functions in the Book class to compare two books based on their book IDs. The comparison should allow you to determine whether one book is greater than, less than, or equal to another book based on their IDs.Provide the necessary code for the Book class, including the member variables and the operator overloading functions for the comparison operators.
Solution
Sure, here is the C++ code for the Book class with the necessary operator overloading functions:
#include <string>
class Book {
private:
std::string title;
std::string author;
int bookID;
public:
// Constructor
Book(std::string title, std::string author, int bookID) : title(title), author(author), bookID(bookID) {}
// Getters
std::string getTitle() const { return title; }
std::string getAuthor() const { return author; }
int getBookID() const { return bookID; }
// Operator overloading for comparison based on bookID
bool operator==(const Book& other) const {
return bookID == other.bookID;
}
bool operator!=(const Book& other) const {
return !(*this == other);
}
bool operator<(const Book& other) const {
return bookID < other.bookID;
}
bool operator>(const Book& other) const {
return bookID > other.bookID;
}
bool operator<=(const Book& other) const {
return !(*this > other);
}
bool operator>=(const Book& other) const {
return !(*this < other);
}
};
In this code, we have a Book class with three private member variables: title, author, and bookID. The constructor initializes these variables. We have getters for each of these variables.
We then have operator overloading functions for the comparison operators. These functions compare two Book objects based on their bookID. The == operator checks if the bookIDs are equal, the != operator checks if they are not equal, the < operator checks if the bookID of the current object is less than the other, the > operator checks if it's greater, the <= operator checks if it's less than or equal, and the >= operator checks if it's greater than or equal.
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