C++ Programming Language
C++ is a computer programming language developed by Bjarne Stroustrup as an extension of the C language. It is known for is fast speed, low level memory management and is often taught as first programming language. It provides:
- Hands-on application of different programming concepts.
- Similar syntax to C and other popular languages making it easier to switch.
This C++ tutorial is designed to provide a guide for easy and efficient learning of both core and advanced concepts of C++. Each concept is explained with simple illustrations and practical code examples that can be executed easily. This tutorial also provides quizzes and practice problems after each section to test your understanding. Let's start!
Example Program
The below code shows the simplest C++ program that you can run to print some text on the console screen.
#include <iostream>
using namespace std;
int main() {
cout << "Hello World";
return 0;
}
Output
Hello World
Fundamentals
This section guides you through the basic concepts of C++. It covers topics that teaches you to write your first program, manage data, perform different operations and control the flow of the program.
- Introduction
- Identifiers
- Keywords
- Variables
- Data Types
- Quiz: Basics, Variables and Data Types
- Operators
- Basic Input / Output
- Quiz: Operator, Input Output
- Conditional Statements
- Loops
- Quiz: Control Statements, Loops
Function
Functions allows users to divide the program into multiple blocks each performing a specific task. This section teaches you how to work with functions to write a modular and reusable code.
- Functions
- Parameter Passing Techniques
- Default Arguments
- Recursion
- Inline Functions
- Lambda Expression
- Quiz: Functions
Compound Data Types
Compound data types are created from the built-in data types. This section guides you through important compound data types such as array, strings, pointer and structures that helps in managing complex real-world data.
- Arrays
- Pointers
- References
- Quiz: Array, Pointer, Reference
- Strings
- Structures
- Unions
- Enumeration
- Quiz: Strings, Structure and Union
Dynamic Memory Management
C++ allows the low-level memory manipulation using pointers and dynamic memory allocation/deallocation operators. This section guides you through the basis of dynamic memory management.
Object Oriented Programming (OOPs)
This section covers key concepts of Object-Oriented Programming (OOPs) in C++ such as classes, objects, encapsulation, inheritance, polymorphism, and abstraction.
- Object Oriented Programming (OOPs)
- Classes and Objects
- Encapsulation
- Polymorphism
- Inheritance
- Abstraction
- Quiz: OOPs Quiz
Exception Handling
Exception handling are the techniques to handle runtime errors efficiently. This section covers how to handle exceptions to prevent crashes and improve the reliability of applications.
- Exception Handling
- Exception Handling using Classes
- Stack Unwinding
- User-Defined Exceptions
- Quiz: Exception Handling Quiz
File Handling
File handling allows programs to store and retrieve data from files. This section introduces file handling in C++ using streams. It covers reading from and writing to files using streams.
Standard Template Library (STL)
This section covers Standard Template Library (STL) which is an in-built library that provides a set of commonly used data structures such as vectors, lists, stacks, queues, maps, etc. and algorithms that enhance productivity and performance.
- Templates
- Standard Template Library (STL)
- Algorithms
- Containers
- Iterators
- Vector
- Stack
- Queue
- Map
- Set
- Quiz: STL Quiz
Advanced C++
This section covers advanced concepts in C++ such as move preprocessor, multithreading, etc. Mastering these topics allows developers to write efficient, high-performance C++ applications.
C++ Skill Assessments
Test what you have learnt through this C++ using a series of our Skill Assessment Test.
- Beginner Skill Assessment Practice Test
- Intermediate Skill Assessment Practice Test
- Advanced Skill Assessment Practice Test
C++ Interview Questions
Quickly prepare yourself for C++ interviews with the help of our carefully curated list of commonly asked interview questions.
- Top 50 C++ Interview Questions and Answers
- Top C++ STL Interview Questions and Answers
- 30 OOPs Interview Questions and Answers
- Top C++ Exception Handling Interview Questions and Answers
C++ vs Other Programming Languages
Let's see where C++ stands as compared to other programming language:
| Feature | C++ | C | Java | Python | JavaScript |
|---|---|---|---|---|---|
| Type | Compiled | Compiled | Compiled and Interpreted | Interpreted | Interpreted |
| Paradigm | Multi-paradigm (procedural, object-oriented, generic) | Procedural, structured | Object-oriented, structured | Multi-paradigm (object-oriented, procedural, functional) | Multi-paradigm (event-driven, functional) |
| Memory Management | Manual | Manual | Automatic | Automatic | Automatic (with garbage collection) |
| Syntax | Complex | Complex | Complex | Simple | Simple (but can be more complex with frameworks) |
| Use Cases | System programming, game development, high-performance applications | System programming, embedded systems, game development | Large-scale applications, enterprise software | Web development, data analysis, machine learning | Web development, server-side scripting, mobile apps |
| Notable Frameworks/Libraries | Standard Library, Boost | Standard Library | Spring, Hibernate | Django, Flask | Node.js, React, Angular, Vue, Express |
| Community Support | Strong | Strong | Strong | Strong | Strong |
| Job Market | Abundant | Abundant | Abundant | Abundant | Abundant |
Frequently Asked Questions (FAQs)
Is C++ easy to learn?
For a new programmer, it might be a bit difficult to learn C++. For programmers familiar with other programming languages, only a few concepts might be somewhat hard.
Is it worth to learn C++ in 2025?
Absolutely! C++ is still widely used in embedded systems, operating systems, high performance applications, gaming engines and it is not going to change in the near future. Moreover, if you are beginner, it is recommended to start with C++ as it provides a clear picture of the important programming concepts.
Which companies use C++?
Many companies from different fields use C++ for its performance and efficiency. Some of the major ones are:
- Microsoft: C++ is used extensively in Windows development.
- Google: Uses C++ for various services, such as search algorithms, backend systems, and v8 JavaScript engine.
- Valve: Known for using C++ in their Source gaming engine.
- Epic Games: The Unreal Engine is built using C++.
- Goldman Sachs: C++ is widely used for high-frequency trading systems
- Adobe: Uses C++ in applications like Photoshop, Illustrator, and other design software.
- Qualcomm: C++ is used for mobile hardware and software.
Can C++ get you a job?
Learning only the programming language is not sufficient for getting a job. You also need to learn how to use this programming language for specific purpose. For example, in case of C++, learning its application in system programming, game development, etc. can definitely get you a good job.
How to use C++ for competitive programming?
For configuring C++ for competitive programming, refer to the article - Competitive Programming – A Complete Guide
