Variable declaration and initialization in C++ - 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 initialize them with values in C++.

📋 What You'll Learn

Declare variables with correct types

Initialize variables with given values

Print the values to the console

💡 Why This Matters

🌍 Real World

Storing and managing information about items like books is common in many software programs.

💼 Career

Understanding how to declare and initialize variables is a fundamental skill for any programming job.

1

Declare variables for book information

Declare a variable called title of type std::string and initialize it with the value "The Great Gatsby".

C++

#include 
#include 

int main() {
    // Declare variable title and initialize
    // Your code here

    return 0;
}

Need a hint?

Use std::string to declare a text variable and assign the value with =.

2

Declare and initialize more variables

Declare a variable called author of type std::string and initialize it with "F. Scott Fitzgerald". Also declare an int variable called year and initialize it with 1925.

C++

#include 
#include 

int main() {
    std::string title = "The Great Gatsby";
    // Declare author and year variables and initialize
    // Your code here

    return 0;
}

Need a hint?

Use std::string for text and int for whole numbers.

3

Add a variable for price

Declare a variable called price of type double and initialize it with 10.99.

C++

#include 
#include 

int main() {
    std::string title = "The Great Gatsby";
    std::string author = "F. Scott Fitzgerald";
    int year = 1925;
    // Declare price variable and initialize
    // Your code here

    return 0;
}

Need a hint?

Use double for decimal numbers.

4

Print all book information

Use std::cout to print the variables title, author, year, and price each on its own line.

C++

#include 
#include 

int main() {
    std::string title = "The Great Gatsby";
    std::string author = "F. Scott Fitzgerald";
    int year = 1925;
    double price = 10.99;

    // Print all variables
    // Your code here

    return 0;
}

Need a hint?

Use std::cout << variable << std::endl; to print each variable on a new line.