Array of structures - Mini Project: Build & Apply

Array of structures

📖 Scenario: You are managing a small library system. You want to store information about books including their title and number of pages.

🎯 Goal: Create an array of structures to hold book information, then print the details of each book.

📋 What You'll Learn

Define a structure named Book with two members: title (string) and pages (integer).

Create an array named library of 3 Book structures with exact titles and page counts.

Use a loop to print each book's title and page count.

💡 Why This Matters

🌍 Real World

Storing and managing collections of related data like books, students, or products is common in software applications.

💼 Career

Understanding arrays of structures is essential for working with complex data in C programming jobs, especially in systems programming and embedded development.

1

Define the Book structure and create the library array

Define a structure called Book with a char array title[50] and an int pages. Then create an array called library of 3 Book elements with these exact entries: {"C Programming", 250}, {"Data Structures", 300}, {"Algorithms", 400}.

C

// Define the Book structure and create the library array
// Your code here

Need a hint?

Use struct keyword to define the structure. Use curly braces to initialize the array with exact titles and pages.

2

Create a variable to hold the number of books

Create an int variable called num_books and set it to 3 to represent the number of books in the library array.

C

#include 

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

struct Book library[3] = {
    {"C Programming", 250},
    {"Data Structures", 300},
    {"Algorithms", 400}
};

// Create an int variable num_books and set it to 3
// Your code here

Need a hint?

Just create a simple integer variable and assign the value 3.

3

Use a for loop to print each book's details

Write a for loop using int i from 0 to less than num_books. Inside the loop, print the book's title and pages using library[i].title and library[i].pages.

C

#include 

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

struct Book library[3] = {
    {"C Programming", 250},
    {"Data Structures", 300},
    {"Algorithms", 400}
};

int num_books = 3;

// Use a for loop to print each book's title and pages
// Your code here

Need a hint?

Use a for loop with i from 0 to num_books - 1. Use printf to show the title and pages.

4

Print the final output

Run the program to print the details of all books in the library array.

C

#include 

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

struct Book library[3] = {
    {"C Programming", 250},
    {"Data Structures", 300},
    {"Algorithms", 400}
};

int num_books = 3;

int main() {
    for (int i = 0; i < num_books; i++) {
        printf("Title: %s, Pages: %d\n", library[i].title, library[i].pages);
    }
    return 0;
}

// Run the program to see the output

Need a hint?

Make sure your program prints each book's title and pages on a new line exactly as shown.