Why structures are needed in C++ - See It in Action

Why structures are needed

📖 Scenario: Imagine you want to keep information about a book in a library. You need to store the title, author, and number of pages together. Using separate variables for each piece of information can get confusing and messy.

🎯 Goal: You will create a struct in C++ to group related information about a book. This will help you keep the data organized and easy to use.

📋 What You'll Learn

Create a struct called Book with three members: title (string), author (string), and pages (int).

Create a variable of type Book called myBook and assign values to its members.

Print the book details using the myBook variable.

💡 Why This Matters

🌍 Real World

Structures are used in real life to keep related information together, like a contact card with name, phone, and email.

💼 Career

Understanding structs is important for programming jobs that involve organizing complex data, such as software development and game programming.

1

Create the Book struct

Write a struct named Book with three members: title and author of type std::string, and pages of type int.

C++

#include 
#include 

// Define struct Book here

int main() {

    return 0;
}

Need a hint?

Use the keyword struct followed by the name Book. Inside curly braces, declare the members with their types.

2

Create a Book variable and assign values

Inside main(), create a variable called myBook of type Book. Assign "The Little Prince" to myBook.title, "Antoine de Saint-Exupéry" to myBook.author, and 96 to myBook.pages.

C++

#include 
#include 

struct Book {
    std::string title;
    std::string author;
    int pages;
};

int main() {
    // Create myBook and assign values
    
    return 0;
}

Need a hint?

Use dot notation to assign values to the members of myBook.

3

Print the book details

Use std::cout to print the book details in this format: Title: The Little Prince, Author: Antoine de Saint-Exupéry, and Pages: 96. Use separate std::cout statements for each line.

C++

#include 
#include 

struct Book {
    std::string title;
    std::string author;
    int pages;
};

int main() {
    Book myBook;
    myBook.title = "The Little Prince";
    myBook.author = "Antoine de Saint-Exupéry";
    myBook.pages = 96;

    // Print book details here

    return 0;
}

Need a hint?

Use std::cout with the insertion operator << to print each member with a label.

4

Run and see the output

Run the program and observe the output. It should display the book details exactly as:
Title: The Little Prince
Author: Antoine de Saint-Exupéry
Pages: 96

C++

#include 
#include 

struct Book {
    std::string title;
    std::string author;
    int pages;
};

int main() {
    Book myBook;
    myBook.title = "The Little Prince";
    myBook.author = "Antoine de Saint-Exupéry";
    myBook.pages = 96;

    std::cout << "Title: " << myBook.title << std::endl;
    std::cout << "Author: " << myBook.author << std::endl;
    std::cout << "Pages: " << myBook.pages << std::endl;

    // Run the program to see output

    return 0;
}

Need a hint?

Make sure your output matches the expected format exactly, including capitalization and spacing.