Typedef keyword in C - Mini Project: Build & Apply

Using the typedef Keyword in C

📖 Scenario: You are working on a simple program that manages information about books in a library. To make your code cleaner and easier to read, you want to create a new name for a complex data type using the typedef keyword.

🎯 Goal: Learn how to use the typedef keyword to create a new type name for a struct that holds book information, and then use this new type to create variables.

📋 What You'll Learn

Create a struct named Book with fields title (string), author (string), and year (integer).

Use typedef to create a new type name BookType for the struct Book.

Declare a variable of type BookType and assign values to its fields.

Print the book information using the variable of type BookType.

💡 Why This Matters

🌍 Real World

Using <code>typedef</code> helps programmers write cleaner and easier-to-understand code by giving complex data types simple names.

💼 Career

Many C programming jobs require working with structs and typedefs to manage data efficiently and maintain readable code.

1

Create the struct Book

Write a struct named Book with three fields: title and author as arrays of 50 characters, and year as an int.

C

# Define struct Book with title, author, and year
// Your code here

Need a hint?

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

2

Create a new type name BookType using typedef

Use the typedef keyword to create a new type name BookType for the struct Book.

C

#include 

struct Book {
    char title[50];
    char author[50];
    int year;
};

// Use typedef to create BookType
// Your code here

Need a hint?

Write typedef struct Book BookType; after the struct definition.

3

Declare a variable of type BookType and assign values

Declare a variable named myBook of type BookType. Assign the title "The C Programming Language", author "Kernighan and Ritchie", and year 1978 to myBook.

C

#include 

struct Book {
    char title[50];
    char author[50];
    int year;
};

typedef struct Book BookType;

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

Need a hint?

Use strcpy to copy strings into the character arrays.

4

Print the book information

Add printf statements to print the title, author, and year of myBook in the format:
Title: The C Programming Language
Author: Kernighan and Ritchie
Year: 1978

C

#include 
#include 

struct Book {
    char title[50];
    char author[50];
    int year;
};

typedef struct Book BookType;

int main() {
    BookType myBook;
    strcpy(myBook.title, "The C Programming Language");
    strcpy(myBook.author, "Kernighan and Ritchie");
    myBook.year = 1978;
    
    // Print book info
    // Your code here
    return 0;
}

Need a hint?

Use printf with %s for strings and %d for integers.