Accessing structure members - Mini Project: Build & Apply

Accessing structure members

📖 Scenario: You are working on a simple program to store and display information about a book. You will create a structure to hold the book's title and number of pages, then access and print these details.

🎯 Goal: Build a C program that defines a struct for a book with a title and page count, assigns values to its members, and prints them.

📋 What You'll Learn

Define a struct named Book with members title (string) and pages (integer).

Create a variable of type Book named myBook.

Assign the title "C Programming" to myBook.title.

Assign the number 250 to myBook.pages.

Print the book's title and page count using printf.

💡 Why This Matters

🌍 Real World

Structures help organize related data together, like storing information about books, students, or products in a program.

💼 Career

Understanding structures is essential for C programming jobs, especially in systems programming, embedded systems, and software development where grouping data logically is important.

1

Define the Book structure

Define a struct named Book with two members: title as a character array of size 50, and pages as an integer.

C

# Define the struct Book with members title and pages
// Your code here

Need a hint?

Use struct Book { char title[50]; int pages; }; to define the structure.

2

Create a Book variable and assign values

Create a variable named myBook of type struct Book. Assign the string "C Programming" to myBook.title using strcpy, and assign the integer 250 to myBook.pages. Include #include <string.h> at the top.

C

#include 
#include 

struct Book {
    char title[50];
    int pages;
};

// Create myBook and assign values
// Your code here

Need a hint?

Remember to include #include <string.h> to use strcpy.

3

Access and print the structure members

Inside the main function, use printf to print the book's title and page count from myBook. Use myBook.title and myBook.pages to access the members.

C

#include 
#include 

struct Book {
    char title[50];
    int pages;
};

int main() {
    struct Book myBook;
    strcpy(myBook.title, "C Programming");
    myBook.pages = 250;
    // Print the book title and pages
    // Your code here
    return 0;
}

Need a hint?

Use printf("Title: %s\n", myBook.title); and printf("Pages: %d\n", myBook.pages); to print.

4

Run and check the output

Run the program and ensure it prints exactly:
Title: C Programming
Pages: 250

C

#include 
#include 

struct Book {
    char title[50];
    int pages;
};

int main() {
    struct Book myBook;
    strcpy(myBook.title, "C Programming");
    myBook.pages = 250;
    printf("Title: %s\n", myBook.title);
    printf("Pages: %d\n", myBook.pages);
    // Check output
}

Need a hint?

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