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How to check c++ version?

From seasoned developers to coding novices, knowing how to check your C++ version is an essential part of writing efficient and error-free programs. Whether you’re working on a large-scale project or simply practicing new coding skills, understanding which version of C++ you’re using can help you avoid compatibility issues and exploit the rich set of features offered by the language. After all, it’s a cutting-edge coding language that’s always advancing, with distinct versions that each have their own merits and limitations.

Why Check Your C++ Version?

Identifying the version of C++ you’re using increases the accuracy of your output and maximizes potential troubleshooting efficiency. It may seem like a basic first step, but clarity here can inform the direction of your tasks and ultimately shape the functionality and efficiency of your program. Besides, when you encounter error messages related to syntax discrepancies or function misadventures, checking the C++ version might be your first port of call.

The Evolution of C++

C++ has been continuing evolving since its creation in the late 20th century by Bjarne Stroustrup. Updates ordinarily take place every three years, with changes ranging from syntax modifications to the addition of new libraries. Since its inception, a total of six versions have been updated including C++98/03, C++11, C++14, C++17 and most recently, C++20. These updates have gradually refined the language and added various innovative features, making it one of the most powerful and versatile languages available to developers.

How to Check Your C++ Version?

To find out which version you’re using, the process is surprisingly straightforward. Two main methods exist – using a preprocessor directive or using the command-line compiler.

The preprocessor directive method involves writing a simple program that displays the version. Use #if, #elif, #else and #endif to check the predefined macros __cplusplus. The value of this macro indicates the C++ standard that your compiler follows. Below is the code snippet:

int main() {
#if __cplusplus == 201703L
std::cout #elif __cplusplus == 201402L
std::cout #elif __cplusplus == 201103L
std::cout #elif __cplusplus == 199711L
std::cout #else
std::cout #endif


Using the Command-Line Compiler

An alternative approach is using the command-line compiler. In Unix-based systems, just type ‘g++ –version’ or ‘clang –version’ to check which version of the GCC or Clang you have installed. Keep in mind that the C++ language version supported depends on the version of the compiler you are using.

Stay Updated

Ensuring you are using the latest C++ compiler is important for harnessing the full potential offered by C++. Updated versions not only include new features but are also typically faster and more secure. The latest version, C++20, includes concepts, modules, coroutines and many other features that can help you write better code.

Now that you know how to check your C++ version, you can confidently move forward in your coding journey, maximizing the benefits of this power-packed programming language. Whether you’re a seasoned pro or new to the game, marrying the best coding strategies with the most advanced C++ tools is guaranteed to deliver result-oriented programs.

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