Using cin for input in C++ - Mini Project: Build & Apply

Using cin for input

📖 Scenario: You are creating a simple program that asks a user for their age and then displays it back to them.

🎯 Goal: Build a C++ program that uses cin to get the user's age and then prints it.

📋 What You'll Learn

Create an integer variable named age

Use cin to read the user's input into age

Print the age with a message using cout

💡 Why This Matters

🌍 Real World

Getting user input is essential for interactive programs like games, calculators, or data entry tools.

💼 Career

Understanding how to read input from users is a basic skill for software developers working on command-line tools or console applications.

1

Create an integer variable called age

Write a line of code to create an integer variable named age.

C++

#include 

int main() {
    // Create an integer variable called age
    
    return 0;
}

Need a hint?

Use int age; to create the variable.

2

Use cin to read input into age

Write a line of code that uses std::cin to read the user's input into the variable age.

C++

#include 

int main() {
    int age;
    // Use std::cin to read input into age
    
    return 0;
}

Need a hint?

Use std::cin >> age; to get input from the user.

3

Print the age with a message using cout

Write a line of code that uses std::cout to print the message Your age is: followed by the value of age.

C++

#include 

int main() {
    int age;
    std::cin >> age;
    // Print "Your age is: " followed by age
    
    return 0;
}

Need a hint?

Use std::cout << "Your age is: " << age << std::endl; to print the message and value.

4

Run the program and display the output

Run the program and enter 25 when prompted. Write a line of code to print the output exactly as Your age is: 25.

C++

#include 

int main() {
    int age;
    std::cin >> age;
    std::cout << "Your age is: " << age << std::endl;
    // Output is shown when program runs
}

Need a hint?

Type 25 as input when running the program to see the output.