1. Object-Oriented Programming (OOP): C++ supports OOP principles such as encapsulation, inheritance, and polymorphism, allowing for better organization and reusability of code. This helps in creating modular applications and simplifying complex software development. We have separate article on explain features of oops in c++ & you can go through this to get deep on it.
2. Generic: C++ supports the concept of templates, which allow you to write code that can work with different types of data without repeating yourself. You can also use template specialization and partial specialization to customize the behavior of your code for specific types.
3. Functional: C++ supports the concept of functions as first-class objects, which means you can pass them as arguments, store them in variables, and return them from other functions. You can also use lambda expressions to create anonymous functions on the fly.
4. Multiple Inheritance: C++ supports the concept of multiple inheritance, which means you can inherit from more than one base class. This allows you to combine the features and behaviors of different classes into one derived class.
5. Performance: C++ is a compiled language, which means the source code is translated into machine code before execution, allowing for optimal performance. This is particularly useful in systems where speed and efficiency are critical.
6. Statically Typed: C++ is statically typed, which means that the data types of variables must be explicitly specified during declaration. This helps prevent type-related errors and ensures that type checking is done at compile-time.
7. Rich Standard Library: C++ has an extensive standard library, known as the C++ Standard Library, which provides a wide range of pre-built functionality for various programming tasks, such as file I/O, data structures, algorithms, and more.
8. Templates: C++ supports templates, allowing for generic programming. This enables developers to write reusable code that can work with different data types, without duplicating code for each type.
9. Memory Management: C++ provides features for manual memory management, allowing developers to allocate and deallocate memory as needed. This can lead to better control over resource usage and performance optimization.
10. Multi-Paradigm Support: C++ supports different programming paradigms, including procedural, object-oriented, and generic programming, providing flexibility to developers in choosing the best approach for a given problem.
11. Compatibility with C: C++ is mostly backward compatible with the C language, allowing developers to use existing C libraries and code within C++ programs.
12. Overloading: C++ allows function and operator overloading, which means that you can define multiple functions with the same name but different parameters, or redefine the behavior of operators for custom types.
13. Exception Handling: C++ supports exception handling, which provides a structured way to handle errors and exceptions during program execution. This helps improve the robustness and maintainability of the code.
14. Namespaces: C++ supports namespaces, which help avoid naming conflicts between different parts of code. This is particularly useful in large projects with multiple libraries and components.
15. Inline Functions: C++ allows for the use of inline functions, which can be used to suggest to the compiler to replace the function call with the function code. This can improve performance in certain situations by reducing function call overhead.
16. RAII (Resource Acquisition Is Initialization): This is a programming idiom in C++ that binds the lifetime of a resource (such as memory or file handles) to the lifetime of an object. This helps in managing resources more effectively and avoiding resource leaks.
17. Constexpr: Constexpr is a keyword in C++ that enables the evaluation of expressions at compile-time. This can be used to create more efficient code, especially for calculations that can be determined during compilation.
18. Lambda Expressions: C++11 introduced lambda expressions, which are anonymous functions that can be defined and used directly within code. Lambda expressions make it easier to write functional-style code and can be used with algorithms from the Standard Library.
19. Smart Pointers: C++11 also introduced smart pointers, which are a safer and more convenient way to manage memory compared to raw pointers. They help to automate memory management and reduce the risk of memory leaks.
20. Move Semantics: C++11 introduced move semantics, which allows for the efficient transfer of resources between objects, especially for temporary objects or large data structures. This can improve performance by avoiding unnecessary copying of data.
21. Type Inference: C++11 introduced the ‘auto’ keyword, which allows the compiler to infer the type of a variable based on its initializer. This can make the code more concise and easier to read.
22. Multithreading Support: C++11 added native support for multithreading, making it easier to write concurrent and parallel code. The Standard Library now includes thread management, synchronization primitives, and atomic operations.
23. Range-Based for Loops: C++11 introduced range-based for loops, which simplify iterating over collections and make the code more readable.

These are some of the features of C++ that make it a powerful and versatile programming language. If you want to learn more about C++, you can check out some online tutorials or books that will teach you the basics and advanced concepts of this language.