Question

Objectives: The main objective of this assignment is checking students’ ability to implement membership functions. After completing this assignment, students will be able to:

 implement member functions

 convert a member function into a standalone function

 convert a standalone function into a member function

 call member functions

 implement constructors

 use structs for function overloading

Problem description: In this assignment, we will revisit Assignment #1. Mary has now created a small commercial library and has managed to collect sales data. She wants to be able to print the books based on sales, and the list of authors based on their date of birth. This assignment needs the structs Book, Author, Date, and Library.

Processing inventory: She wants to display the books by popularity, thus the program must print the books based on sales, from highest to lowest. You will need to save the output into a text file named OrderedBooks.txt. Utilize the Book struct to implement the desired functionality.

Similarly, Mary is interested in displaying the authors by age, printing the oldest authors first. An output filed OrderedAuthors.txt should be created. Appropriate operations must be implemented inside the Author struct, and properly use the Data struct to compare author ages.

Finally, utilize the Library struct to store the lists of authors and books, and contain the functionality that the librarian requires.

You must use both member functions and non-member functions. One of the Book or Author sorting mechanisms must be implemented via member function (you can choose which) and the other with a non-member function.

You must use constructors to initialize all data variables in structs with default values at the beginning of the program. Use of global variables will incur a deduction of 10 points from your total points.

Assg1 code

#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
#include <stdlib.h>

using namespace std;


struct Date
{
    int month;
    int day;
    int year;
};
struct Author
{
    string name;
    Date birth;
    string notable_work;
    string nationality;
};

struct Book
{
    string title;
    string author;
    int release_year;
    string language;
    string genre;
};

void Menu();
void ReadBooks(ifstream& inFile, Book *books, int nun_books);
void ReadAuthors(ifstream& inFile, Author *authors, int num_authors);
void PrintBooks(Book *books, int size);
void PrintAuthors(Author *authors, int size);
void FindMatches(Book *books, Author *authors, int book_size, int author_size);
string RemoveUnderScore(string word);

int main()
{
    Menu();
    return 0;
}

void Menu()
{
    ifstream inAuthors;
    ifstream inBooks;
    int input;

    redo:
    cout<<endl<<endl;
    cout<<setw(20)<<"1.   Print Books"<<endl;
    cout<<setw(22)<<"2.   Print Authors"<<endl;
    cout<<setw(22)<<"3.   Print Matches"<<endl;
    cout<<setw(18)<<"4.   Terminate"<<endl;
    cout<<setw(20)<<"Enter Selection:";
    cin>>input;


    if(cin.fail() == true)
    {
        system("CLS");
        cout<<"Invalid Input"<<endl;
        cin.clear();
        cin.ignore(10000, '\n');
        goto redo;
    }
    else if(input == 1)
    {
        system("CLS");
        inBooks.open("Books.txt");
        int num_books;

        inBooks>>num_books;
        Book books[num_books];
        ReadBooks(inBooks, books, num_books);
        PrintBooks(books, num_books);
        inBooks.close();
    }
    else if(input == 2)
    {
        system("CLS");
        inAuthors.open("Authors.txt");

        int num_authors;
        inAuthors>>num_authors;
        Author authors[num_authors];
        ReadAuthors(inAuthors, authors, num_authors);
        PrintAuthors(authors, num_authors);
        inAuthors.close();
    }
    else if(input == 3)
    {
        system("CLS");
        inAuthors.open("Authors.txt");
        inBooks.open("Books.txt");

        int num_authors;
        inAuthors>>num_authors;
        Author authors[num_authors];
        ReadAuthors(inAuthors, authors, num_authors);

        int num_books;
        inBooks>>num_books;
        Book books[num_books];
        ReadBooks(inBooks, books,   num_books);
        FindMatches(books, authors,  num_books,  num_authors);

        inBooks.close();
        inAuthors.close();
    }
    else
        goto end;
    goto redo;
    end:
    cout<<endl<<endl;
    cout<<"Termination"<<endl;
}

void ReadBooks(ifstream& inFile, Book *books, int num_books)
{
    for(int i=0; i<num_books; i++)
    {
        inFile>>books[i].title;
        books[i].title= RemoveUnderScore(books[i].title);
        inFile>>books[i].author;
        books[i].author = RemoveUnderScore(books[i].author);
        inFile>>books[i].release_year;
        inFile>>books[i].language;
        inFile>>books[i].genre;
    }
}

void PrintBooks(Book *books, int size)
{
    cout<<setw(60)<<"Books"<<endl<<endl;
    cout<<setw(10)<<"Title"<<setw(47)<<"Author"<<setw(28)<<"Release Year"<<setw(25)<<"Language"<<setw(30)<<"Genre"<<endl<<endl;
    for(int i=0; i< size; i++)
    {
        cout<<setw(40)<<left<<books[i].title<<setw(20)<<right<<books[i].author<<right<<setw(20)<<books[i].release_year<<setw(30)<<books[i].language<<setw(35)<<books[i].genre<<endl;
    }
}

void ReadAuthors(ifstream& inFile, Author *authors, int num_authors)
{
    Date temp_date;
    string b_date;
    string temp;
    for(int i=0; i<num_authors; i++)
    {
        inFile>>authors[i].name;
        authors[i].name = RemoveUnderScore(authors[i].name);
        inFile>>b_date;
        temp= b_date.substr(0,2);
        authors[i].birth.month=atoi(temp.c_str());

        temp= b_date.substr(3,2);
        authors[i].birth.day=atoi(temp.c_str());
        temp = b_date.substr(6,4);
        authors[i].birth.year=atoi(temp.c_str());
        authors[i].nationality = "unknown";
        inFile>>authors[i].notable_work;
        authors[i].notable_work = RemoveUnderScore(authors[i].notable_work);
    }
}

void PrintAuthors(Author *authors, int size)
{
    cout<<setw(60)<<"Authors"<<endl<<endl;
    cout<<setw(10)<<"Name"<<setw(30)<<"Date of Birth"<<setw(30)<<"Notable Work"<<endl<<endl;
    for(int i=0; i< size; i++)
    {
        cout<<setw(20)<<left<<authors[i].name<<right<<setw(10)<<authors[i].birth.month<<"/"<<authors[i].birth.year<<right<<setw(35)<<authors[i].notable_work<<endl;
    }
}

void FindMatches(Book *books, Author *authors, int book_size, int author_size)
{
     cout<<setw(60)<<"Authors Matched"<<endl<<endl;
     cout<<setw(15)<<"Name"<<setw(30)<<"Nationality"<<setw(30)<<"Book"<<endl<<endl;
    for(int i=0; i<book_size; i++)
        for(int j=0; j<author_size; j++)
        {
            if(authors[j].name == books[i].author)
            {
                authors[j].nationality = books[i].language;
                cout<<setw(20)<<authors[j].name<<setw(25)<<authors[j].nationality<<setw(40)<<books[i].title<<endl;
            }
        }
}

string RemoveUnderScore(string word)
{
    for(int i=0; i<word.length(); i++)
    {
        if(word[i]=='_')
            word[i]=' ';
    }
    return word;
}

Books.txt

11
The_Name_of_the_Rose Umberto_Eco 1983 Italian Mystery   12000
Norwegian_Wood Haruki_Murakami 2000 Japanese Fiction    6000
The_Name_of_the_Wind Patrick_Rothfuss 2007 English Fantasy      4920
The_Girl_with_the_Dragon_Tattoo Stieg_Larsson 2005 Swedish Thriller     7049
The_Brothers_Karamazov Fyodor_Dostoevsky 1880 Russian Fiction   6948
Demonic_Males Richard_Wrangham 1997 English Non-Fiction 1209
War_and_Peace Leo_Tolstoy 1899 Russian Historical-Fiction       5890
Baudolino Umberto_Eco 2000 Italian Historical-Fiction   2134
The_Lies_of_Locke_Lamora Scott_Lynch 2006 English Fantasy       6676
The_Last_of_the_Wine Mary_Renault 1956 English Historical-Fiction       579
Brave_New_World Aldous_Huxley 1932 English Science-Fiction      4677

Authors.txt

7
Haruki_Murakami 01/12/1949 A_Wild_Sheep_Chase
Leo_Tolstoy 09/09/1828 War_and_Peace
Fyodor_Dostoevsky 11/11/1821 Crime_and_Punishment
Nikos_Kazantzakis 02/18/1883 The_Last_Temptation
Charles_Bukowski 08/16/1929 Post_Office
George_Orwell 06/25/1903 1984
John_Milton 12/09/1608 Paradise_Lost

Answer 1

----------------------------------------------------------------------

Program

//Header files
#include<iostream>
#include<string>
#include<fstream>
#include<iomanip>
#include<ctime>
using namespace std;

//Book structure
struct Book {
   string BookTitle;
   string AuthorName;
   int publicationYearInEnglish;
   string OriginalLanguage;
   string BookGenre;
   int soldRate;
};
//Author structure
struct Author {
   string AuthorName;
   string DateOfBirth;
   string NotableBook;
};
//Function prototypes
int readBooks(Book*,ifstream&);
int readAuthor(Author*, ifstream&);
int menu();
void printBooks();
void printAuthors();
void getBook(Book*,int);
string removeUnderScore(string);
void sortByPopularity(Book*, int);
void sortByAge(Author*, int);
//Main method
int main()
{
   //File read object
   ifstream in;
   //Books.txt path
   in.open("C:/Users/deept/Desktop/Books.txt");
   //Book structure array
   Book book[50];
   //Read books details from Books.txt
   int book_count=readBooks(book,in);
   //Close file
   in.close();
   //Path for Author.txt
   in.open("C:/Users/deept/Desktop/Author.txt");
   //Author struct array
   Author author[50];
   //Read author details from Author.txt
   int author_count = readAuthor(author, in);
   //close file
   in.close();
   //User option
   int ch = menu();
   //If not exit continue
   while (ch != 4) {
       switch (ch) {
           //Print all book details in the collection
       case 1:
           printBooks();
           break;
           //Print all author's details in the collection
       case 2:
           printAuthors();
           break;
           //Get favourite author book and nationality
       case 3:
           getBook(book,book_count);
           break;
       default:
               break;
       }
       ch = menu();
   }
   //End
   cout << "\nProgram Ending......" << endl;
    return 0;
}
//Method to read all book details
//Store in book array
//Call sort method to sort by sold values
//return count of book details in the collection
int readBooks(Book* book, ifstream& in) {
   int count = 0;
   if (!in) {
       cout << "File can't be open" << endl;
       exit(0);
   }
   else {
       in >> count;
       int i = 0;
       while (!in.eof()) {
           in >> book[i].BookTitle>> book[i].AuthorName>> book[i].publicationYearInEnglish >> book[i].OriginalLanguage >> book[i].BookGenre>>book[i].soldRate;
           i++;
       }
   }
   sortByPopularity(book, count);
   return count;
}
//Method to read all author details
//Store in author array
//call sort author method by their age
//return count of author details in the collection
int readAuthor(Author* author, ifstream& in) {
   int count = 0;
   if (!in) {
       cout << "File can't be open" << endl;
       exit(0);
   }
   else {
       in >> count;
       int i = 0;
       while (!in.eof()) {
           in >> author[i].AuthorName >> author[i].DateOfBirth >> author[i].NotableBook;
           i++;
       }
   }
   sortByAge(author, count);
   return count;
}
//Method to display user options
//take user option
//check error
//Return option
int menu() {
   int ch;
   cout << "     WELCOME TO MARY's COOLECTION" << endl;
   cout << "1.Print Books\n2.Print Authors\n3.Search Favourite Author Book\n4.Quit" << endl;
   cout << "Enter your choice: ";
   cin >> ch;
   while (ch < 1 || ch>4) {
       cout << "Wrong choice!!!.Choice should be 1..4\nRe-enter." << endl;
       cout << "Enter your choice: ";
       cin >> ch;
   }
   return ch;
}
//Method to remove all underscores in the given string
//return removed string
string removeUnderScore(string str) {
   for (int i = 0; i < str.length(); i++)
   {
       if (str[i] =='_')
           str[i] = ' ';
   }
   return str;
}
//Method to print all books details in the collection by popularity order
void printBooks() {
   ifstream in("c:/Users/deept/Desktop/OrderedBooks.txt");
   if (!in) {
       cout << "File can't be open " << endl;
       exit(0);
   }
   else {
       int i = 0;
       string title, name,lang,gnr;
       int yr;
       cout << fixed;
       cout << "    Book Title                           Book Name     Published Year     Language         Genre\n" << endl;
       while (!in.eof()) {
           in >> title >>name>>yr>>lang >> gnr;
           cout << setw(25) << removeUnderScore(title) << "\t" << setw(20) << removeUnderScore(name) << "\t" << setw(10) << yr << "\t" << setw(10) << lang << "\t" << setw(10) <<gnr << endl;
           i++;
       }
   }
   in.close();
}
//Method to print all author details in the collection by ordered age
void printAuthors() {
   ifstream in("c:/Users/deept/Desktop/OrderedAuthor.txt");
   if (!in) {
       cout << "File can't be open " << endl;
       exit(0);
   }
   else {
       //int i = 0;
       string name,book;
       cout << fixed;
       cout << "      Author Name               Notable Book\n" << endl;
       while (!in.eof()) {
           in >> name>>book;
           cout << setw(20) << removeUnderScore(name) << "\t\t" << removeUnderScore(book) << endl;
           //i++;
       }
   }
   in.close();
}
//Method to get favourite author book
//Search in book list to get nationality
void getBook(Book* book,int n) {
   string name;
   cout << "Enter the author name: ";
   cin.ignore();
   getline(cin,name);
           for (int j = 0; j < n; j++) {
               if (removeUnderScore(book[j].AuthorName) == name) {
                   cout << "Author name: " << name << "\t\t" << "Book Name: " << removeUnderScore(book[j].BookTitle) << "\t\t" << "Nationality: " << book[j].OriginalLanguage << endl;
                   return;
               }
           }
   cout << name << " is not present in the collection!!" << endl;
}
void sortByPopularity(Book* book, int n) {
   for (int i = 0; i < n; i++) {
      
           for (int j = i + 1; j<n; j++)
           {
               if (book[i].soldRate<book[j].soldRate)
               {
                   int temp = book[i].soldRate;
                   string title = book[i].BookTitle;
                   string name = book[i].AuthorName;
                   int yr = book[i].publicationYearInEnglish;
                   string lang = book[i].OriginalLanguage;
                   string gnr = book[i].BookGenre;
                   book[i].soldRate = book[j].soldRate;
                   book[i].BookTitle = book[j].BookTitle;
                   book[i].AuthorName = book[j].AuthorName;
                   book[i].publicationYearInEnglish = book[j].publicationYearInEnglish;
                   book[i].OriginalLanguage = book[j].OriginalLanguage;
                   book[i].BookGenre = book[j].BookGenre;
                   book[j].soldRate = temp;
                   book[j].BookTitle = title;
                   book[j].AuthorName = name;
                   book[j].publicationYearInEnglish = yr;
                   book[j].BookGenre = gnr;
                   book[j].OriginalLanguage = lang;
               }
           }
      
   }
   ofstream out("c:/Users/deept/Desktop/OrderedBooks.txt");
   if (!out) {
       cout << "File can't be open " << endl;
       exit(0);
   }
   else {
       for (int i =0; i < n; i++) {
           out << book[i].BookTitle << " " << book[i].AuthorName << " "<< book[i].publicationYearInEnglish << " "<< book[i].OriginalLanguage << " "<< book[i].BookGenre << endl;
       }
   }
   out.close();
}
void sortByAge(Author* author, int n) {
   for (int i = 0; i < n; i++) {
       for (int j = i + 1; j < n; j++) {
           if (author[i].DateOfBirth < author[j].DateOfBirth ){
               string name = author[i].AuthorName;
               string dob = author[i].DateOfBirth;
               string book = author[i].NotableBook;
               author[i].AuthorName = author[j].AuthorName;
               author[i].DateOfBirth = author[j].DateOfBirth;
               author[i].NotableBook = author[j].NotableBook;
               author[j].AuthorName = name;
               author[j].DateOfBirth = dob;
               author[j].NotableBook = book;
           }
       }
   }
   ofstream out("c:/Users/deept/Desktop/OrderedAuthor.txt");
   if (!out) {
       cout << "File can't be open " << endl;
       exit(0);
   }
   else {
       for (int i = 0; i < n; i++) {
           out <<author[i].AuthorName<< " " << author[i].NotableBook<< endl;
       }
   }
   out.close();
}

--------------------------------------------------------------------------------------

Output

     WELCOME TO MARY's COOLECTION
1.Print Books
2.Print Authors
3.Search Favourite Author Book
4.Quit
Enter your choice: 1
    Book Title                           Book Name     Published Year     Language         Genre

     The Name of the Rose                Umberto Eco          1983         Italian         Mystery
The Girl with the Dragon Tattoo        Stieg Larsson          2005         Swedish        Thriller
   The Brothers Karamazov          Fyodor Dostoevsky          1880         Russian         Fiction
The Lies of Locke Lamora                Scott Lynch          2006         English         Fantasy
           Norwegian Wood            Haruki Murakami          2000        Japanese         Fiction
            War and Peace                Leo Tolstoy          1899         Russian      Historical-Fiction
     The Name of the Wind           Patrick Rothfuss          2007         English         Fantasy
          Brave New World              Aldous Huxley          1932         English      Science-Fiction
                Baudolino                Umberto Eco          2000         Italian      Historical-Fiction
            Demonic Males           Richard Wrangham          1997         English      Non-Fiction
     The Last of the Wine               Mary Renault          1956         English      Historical-Fiction
     The Last of the Wine               Mary Renault          1956         English      Historical-Fiction
     WELCOME TO MARY's COOLECTION
1.Print Books
2.Print Authors
3.Search Favourite Author Book
4.Quit
Enter your choice: 2
      Author Name               Notable Book

         John Milton            Paradise Lost
   Fyodor Dostoevsky            Crime and Punishment
         Leo Tolstoy            War and Peace
    Charles Bukowski            Post Office
       George Orwell            1984
   Nikos Kazantzakis            The Last Temptation
     Haruki Murakami            A Wild Sheep Chase
     Haruki Murakami            A Wild Sheep Chase
     WELCOME TO MARY's COOLECTION
1.Print Books
2.Print Authors
3.Search Favourite Author Book
4.Quit
Enter your choice: 3
Enter the author name: Leo Tolstoy
Author name: Leo Tolstoy                Book Name: War and Peace                Nationality: Russian
     WELCOME TO MARY's COOLECTION
1.Print Books
2.Print Authors
3.Search Favourite Author Book
4.Quit
Enter your choice: 4

Program Ending......

Press any key to continue . . .

Screenshot