String input and output in C++ - Mini Project: Build & Apply

String input and output

📖 Scenario: You are creating a simple program that asks a user for their name and then greets them.

🎯 Goal: Build a program that takes a user's name as input and then prints a greeting message including their name.

📋 What You'll Learn

Use a string variable called name to store the user's input.

Use cin to read the user's name.

Use cout to print the greeting message.

💡 Why This Matters

🌍 Real World

Programs often need to get information from users and show messages back. This is the basic way to interact with people using a computer.

💼 Career

Knowing how to handle text input and output is essential for many programming jobs, especially when building command-line tools or simple user interfaces.

1

Create a string variable

Create a string variable called name to store the user's name.

C++

#include 
#include 

int main() {
    // Create a string variable called name
    // Your code here

    return 0;
}

Need a hint?

Use std::string name; to create the variable.

2

Read user input

Use std::cin to read the user's name into the variable name.

C++

#include 
#include 

int main() {
    std::string name;
    // Read the user's name using std::cin
    // Your code here

    return 0;
}

Need a hint?

Use std::cin >> name; to read the input.

3

Print greeting message

Use std::cout to print the message Hello, followed by the user's name and an exclamation mark.

C++

#include 
#include 

int main() {
    std::string name;
    std::cin >> name;
    // Print greeting message
    // Your code here

    return 0;
}

Need a hint?

Use std::cout << "Hello, " << name << "!" << std::endl; to print the greeting.

4

Run the program and see the output

Run the program and enter the name Alice. The program should print Hello, Alice!.

C++

#include 
#include 

int main() {
    std::string name;
    std::cin >> name;
    std::cout << "Hello, " << name << "!" << std::endl;

    // Your code here

    return 0;
}

Need a hint?

Type Alice when the program waits for input and press Enter.