What is C++? First Steps in Programming

Learn the basics of C++ programming, its core concepts, common use cases, and how to write your first programs.

C++ is a powerful programming language often chosen when performance truly matters. It is used in a wide range of areas, from operating systems and game engines to embedded devices and financial applications. What makes C++ stand out is its ability to work close to the hardware while still supporting high-level concepts such as object-oriented programming.

A Brief History of C++

The C++ language was developed in the early 1980s by Bjarne Stroustrup at AT&T Bell Labs. Initially called “C with Classes” because it added the concept of classes to the C language, it was renamed to “C++” in 1983. The “++” operator in C stands for increment, symbolizing that the language is an “improved version of C”.

Over the years, C++ has gone through several standard updates:

C++98 / C++03: The first standards – basic OOP, STL, and exception handling.
C++11: Modern features – auto, nullptr, lambda, unique_ptr.
C++14 / C++17: Performance improvements and simplifications – constexpr, structured bindings.
C++20: Introduced concepts, ranges, and coroutines.
C++23: Expanded the standard library with std::expected and monadic functions.

Where Is C++ Used?

C++ is preferred in areas where performance is critical because compiled code translates directly into machine code and requires no runtime interpreter. Below are some major application areas of C++:

System Software: Operating systems, drivers, file systems
Game Engines: Unreal Engine, Unity’s native components
Embedded Systems: IoT devices, microcontroller applications
Finance & Algorithmic Trading: High-frequency trading systems
Machine Learning Libraries: Core modules of TensorFlow and PyTorch

Strengths of C++

High Performance: Compiled directly to machine code for near-hardware speed.
Object-Oriented Programming: Supports features like classes, inheritance, and polymorphism.
STL (Standard Template Library): Provides ready-to-use data structures and algorithms.
Cross-Platform: The same code can be compiled on multiple operating systems.
Modern Standards: Since C++11, the language has become modern, safer, and more readable.

Getting Started with C++

To start learning C++, you only need to know the following basics:

Install a compiler – for example, GCC, Clang, or MSVC.
Use an IDE or code editor (Visual Studio, VS Code, CLion, Code::Blocks, etc.).
Compile and run source files (.cpp).

After that, you can move on to fundamental topics such as variables, functions, conditions, and loops.

Example: First C++ Program

The classic “Hello, World!” program is shown below. It is the best way to understand how a C++ program is compiled and executed.


#include <iostream>
using namespace std;

int main() {
    cout << "Hello, World!" << endl;
    return 0;
}

In this program:

#include <iostream> → Includes the input/output library.
using namespace std; → Allows using cout directly instead of std::cout.
main() → The main function where program execution starts.

Note: In modern C++ projects, using namespace std; is generally not recommended. In this example, it is used to keep the code simple and make learning easier.

TL;DR

C++ is a powerful and versatile language suitable for both system and application development.
Modern C++ (C++11 and later) enables writing safer and more readable code.
Performance, memory control, and object-oriented structure are its main advantages.
You can start learning step-by-step with the “Hello World” example.