Type modifiers in C++ - Mini Project: Build & Apply

Using Type Modifiers in C++

📖 Scenario: You are working on a simple program that stores and displays information about a product's quantity and price. You want to use type modifiers to make sure the data uses the right amount of memory and behaves correctly.

🎯 Goal: Create variables with type modifiers to store product quantity and price, then display their values.

📋 What You'll Learn

Create an unsigned int variable called quantity with value 150.

Create a const float variable called price with value 19.99.

Create a long long int variable called total_stock with value 1000000.

Print the values of quantity, price, and total_stock.

💡 Why This Matters

🌍 Real World

Type modifiers help programmers use memory efficiently and prevent errors by restricting variable values, which is important in real-world software like inventory systems or financial apps.

💼 Career

Understanding type modifiers is essential for C++ developers to write safe, efficient, and clear code, especially in systems programming, embedded software, and performance-critical applications.

1

Create variables with type modifiers

Create an unsigned int variable called quantity and set it to 150. Also create a const float variable called price and set it to 19.99.

C++

// Create an unsigned int variable called quantity and set it to 150
// Create a const float variable called price and set it to 19.99

Need a hint?

Use unsigned int for quantity because it cannot be negative. Use const float for price because it should not change.

2

Add a long long int variable

Add a long long int variable called total_stock and set it to 1000000.

C++

unsigned int quantity = 150;
const float price = 19.99f;
// Add a long long int variable called total_stock and set it to 1000000

Need a hint?

Use long long int for total_stock because it can hold very large numbers.

3

Write code to print the variables

Write std::cout statements to print the values of quantity, price, and total_stock each on a new line.

C++

unsigned int quantity = 150;
const float price = 19.99f;
long long int total_stock = 1000000;
// Print quantity, price, and total_stock each on a new line

Need a hint?

Use std::cout with << to print each variable followed by std::endl to move to the next line.

4

Run the program and check output

Run the program and ensure it prints the values 150, 19.99, and 1000000 each on its own line.

C++

#include 

unsigned int quantity = 150;
const float price = 19.99f;
long long int total_stock = 1000000;

int main() {
    std::cout << quantity << std::endl;
    std::cout << price << std::endl;
    std::cout << total_stock << std::endl;
    return 0;
}

// Run the program to see the output

Need a hint?

The program should print the three values exactly as shown, each on its own line.