Variable declaration and initialization - Mini Project: Build & Apply

Variable declaration and initialization

📖 Scenario: You are creating a simple program to store and display information about a book.

🎯 Goal: Learn how to declare variables and assign values to them in C.

📋 What You'll Learn

Declare variables with correct types

Initialize variables with given values

Print variable values

💡 Why This Matters

🌍 Real World

Storing and displaying information about objects like books is common in many programs.

💼 Career

Understanding how to declare and initialize variables is a fundamental skill for any C programmer.

1

Declare variables for book information

Declare a variable called title of type char array with size 50, and a variable called pages of type int.

C

#include 

int main() {
    // Declare variables title and pages here

    return 0;
}

Need a hint?

Use char title[50]; to declare a string variable and int pages; for the number of pages.

2

Initialize variables with values

Initialize the variable title with the string "C Programming" using strcpy, and initialize pages with the value 250. Include #include <string.h> at the top.

C

#include 
#include 

int main() {
    char title[50];
    int pages;

    // Initialize title and pages here

    return 0;
}

Need a hint?

Use strcpy(title, "C Programming"); to copy the string and pages = 250; to assign the number.

3

Add a variable for price

Declare a variable called price of type float and initialize it with the value 29.99.

C

#include 
#include 

int main() {
    char title[50];
    int pages;

    strcpy(title, "C Programming");
    pages = 250;

    // Declare and initialize price here

    return 0;
}

Need a hint?

Use float price; to declare and price = 29.99f; to initialize.

4

Print the book information

Use printf to display the book information in this format: Title: C Programming, Pages: 250, Price: $29.99.

C

#include 
#include 

int main() {
    char title[50];
    int pages;
    float price;

    strcpy(title, "C Programming");
    pages = 250;
    price = 29.99f;

    // Print the book information here

    return 0;
}

Need a hint?

Use printf("Title: %s, Pages: %d, Price: $%.2f\n", title, pages, price); to print the values.