Beginner C++ Tutorial

Welcome to the world of C++! This guide is designed for beginners to get started with C++ programming.

1. Hello World

The simplest C++ program:

#include <iostream>
int main() {
    std::cout << "Hello, World!";
    return 0;
}

2. Compiling and Running

To compile and run the Hello World program, follow these steps:

1. Save the code in a file named hello.cpp.
2. Open a terminal and navigate to your project directory.
3. Run: g++ hello.cpp -o hello
4. Execute: ./hello to see “Hello, World!” in your terminal.

3. Variables and Data Types

Before writing useful programs, let’s learn about variables and data types:

• Variables are containers for storing data.
• Data types define the kind of data a variable can hold.

Basic Data Types

Using Variables

#include <iostream>
int main() {
    int x = 10;
    float y = 3.14;
    char c = 'A';
    std::string name = "John";

    std::cout << "x = " << x << ", y = " << y << ", and " << name << std::endl;
    return 0;
}