Tutorials Blog

October 15, 2026

1.1 Module overview

C++ is a general-purpose programming language used to develop software that requires performance, control over system resources, and flexible programming abstractions. It is widely used in game development, desktop applications, embedded systems, system software, and performance-critical applications.

This module introduces the C++ language, its major features, development tools, program structure, and the process of compiling and executing a program.

Learning objectives

By the end of this module, students will be able to:

• Explain what C++ is and where it is used.

• Identify the major features of C++.

• Understand the difference between C and C++.

• Choose a suitable compiler or development environment.

• Write and run a basic C++ program.

• Explain the structure of a C++ program.

• Describe compilation, linking and execution at an introductory level.

Prerequisites: Basic computer literacy. No previous programming experience is required.

Estimated learning time: 2–3 hours, including practical exercises.

1.2 What is C++?

C++ is a general-purpose, statically typed programming language that supports procedural, object-oriented and generic programming. It provides high-level programming abstractions while also allowing low-level operations when needed.

C++ was developed by Bjarne Stroustrup, beginning in the late 1970s, as an extension of the C programming language. It was originally known as “C with Classes” and later renamed C++.

Key characteristics of C++

• Compiled language: C++ source code is typically compiled into native machine code.

• Statically typed: Types are checked primarily at compile time.

• Object-oriented: Classes and objects can model data and behaviour.

• Procedural: Programs can be organized around functions and procedures.

• Generic programming: Templates allow reusable code for different types.

• Performance-oriented: C++ offers control over memory and resource management.

Where is C++ used?

Game development

C++ is used in game engines, real-time rendering and performance-sensitive gameplay systems.

System software

It is used in system utilities, infrastructure software and components that need efficient resource management.

Embedded and automotive systems

C++ can power software for controllers, devices and real-time applications.

Scientific and performance-critical applications

C++ is used in simulations, numerical computing, financial systems and other computationally intensive software.

1.3 History of C++

C++ continues to evolve through international standardization. For this course, we will use modern C++ practices and identify version-specific features when needed.

1.4 Features of C++

High performance

Compiled code and resource-control facilities make C++ suitable for applications with demanding performance requirements.

Object-oriented programming

Classes, objects, inheritance and polymorphism help organize larger programs.

Reusable code

Functions, classes, templates and libraries support code reuse and modular design.

Resource control

C++ supports direct memory management and deterministic resource management techniques.

1.5 Difference between C and C++

C and C++ are related languages, but they have different language features and programming models.

C++ is not simply “C with classes” in its modern form. Although the languages share a historical foundation, they have different rules and features, and not all C programs are valid C++ programs.

1.6 Setting up a C++ development environment

You need a C++ compiler to compile your source code. An IDE or code editor makes writing and managing programs easier.

Visual Studio Code

A code editor. Install a compatible C++ compiler separately, then configure the editor to build and run your programs.

Official website

Visual Studio

An integrated development environment for Windows with C++ development tools available through its installer.

Official website

Code::Blocks

A C/C++ IDE that can work with a compatible compiler toolchain.

Official website

Other common compiler toolchains include GCC and Clang.

Recommended setup for beginners

1. Install an IDE or code editor.

2. Install a compatible C++ compiler.

3. Verify that the compiler is available from your terminal or IDE.

4. Create a file named main.cpp.

5. Write the first C++ program below.

6. Compile and run it.

1.7 Your first C++ program: Hello, World!

The traditional first program displays a short message on the screen.

Source code

#include <iostream>

int main() {
    std::cout << "Hello, World!" << '\n';
    return 0;
}

Output

Hello, World!

Code explanation

Important: C++ is case-sensitive. For example, main, Main and MAIN are different identifiers. Statements such as return 0; require a semicolon.

1.8 Structure of a C++ program

A basic C++ program often contains these parts:

1. Header inclusion

#include <escape><iostream></escape>

Provides standard stream input/output facilities.

2. Main function

int main() { ... }

Defines where execution of a hosted C++ program begins.

3. Program statements

std::cout << "Hello, World!" << '\n';

Performs the operations required by the program.

4. Return from main

return 0;

Signals successful program completion to the host environment.

This is a common introductory structure, not a requirement that every C++ source file must contain all these parts in exactly this arrangement.

1.9 Compilation and execution

C++ source code is normally translated into executable code before the program runs.

Source code

main.cpp

Preprocessing and compilation

Process directives and translate source code

Linking

Combine required compiled code and libraries

Executable program

Ready to run on a compatible system

Program output

These stages describe the typical build process. Compiler implementations may combine or organize the internal steps differently.

Compile and run with GCC

Save the program as main.cpp. If GCC is installed, run these commands in a terminal:

g++ -std=c++17 -Wall -Wextra main.cpp -o main

Then execute it:

• Linux or macOS: ./main

• Windows command prompt: main.exe

Expected output:

Hello, World!

The -std=c++17 option selects the C++17 language standard, and -Wall -Wextra enables additional compiler warnings.

1.10 Common beginner mistakes

1.11 Practical exercises

Try these exercises before checking any solutions.

Exercise 1 — Print your name

Write a C++ program that prints your name on the screen.

Exercise 2 — Display three lines

Print your name, your course name and your institute name on separate lines.

Exercise 3 — Understand the structure

Write a program that prints Welcome to C++ Programming and identify the header, entry-point function, output statement and return statement.

Exercise 4 — Find and fix the errors

Identify the errors in this program and correct them.

#include <iostream>

int main() {
    std::cout << "Learning C++"
    return 0;
}

Exercise 5 — Build and run

Compile one of your programs using GCC or your chosen IDE. Record the command or IDE action used, the output, and any compiler error you encountered.

1.12 Module summary

In this module, you learned:

• The meaning, history and applications of C++.

• The language's major features.

• The main differences between C and C++.

• How to select a compiler and development environment.

• How to write and execute a basic C++ program.

• The roles of #include, main(), std::cout and return 0;.

• The basic stages involved in building a C++ executable.

Module completion criteria: Students should be able to write, compile and run the Hello World program independently and explain its main components.

1.13 Module 1 knowledge-check quiz

Test your understanding of C++ fundamentals. Select an answer for each question and review the feedback after completing the quiz.

Who developed C++?

A. James Gosling

B. Guido van Rossum

C. Dennis Ritchie

D.  Bjarne Stroustrup