Download Online C++ Compiler: A Guide for Beginners

If you are learning or working with C++, you might wonder how to compile and run your code without installing any software on your computer. The answer is simple: use an online C++ compiler. An online C++ compiler is a web-based tool that allows you to write, compile, and execute C++ code in your browser. In this article, we will explain what an online C++ compiler is, what are its benefits, how to use it, and what are the best online C++ compilers in 2023.

What is an online C++ compiler?

An online C++ compiler is a web application that provides a text editor, a compiler, and a debugger for C++. You can write your code in the editor, click a button to compile it, and see the output or errors in the console. Some online C++ compilers also support taking input from the user, using standard libraries, and running graphical or interactive programs. An online C++ compiler does not require any installation or configuration on your computer. You just need a web browser and an internet connection to use it.

Benefits of using an online C++ compiler

Some benefits of using an online C++ compiler are:

No setup is needed. You don’t have to download, install, or update any software on your computer.
No configuration is required. You don’t have to worry about setting up the compiler options, paths, or libraries.
Administration is not required. You don’t have to deal with permissions, licenses, or security issues.
It is accessible from any location. You can use it from any device that has a web browser and an internet connection.
It is capable of sharing resources. You can easily share your code with others by sending them a link or embedding it on a website.
Collaboration is possible. You can work on the same code with others in real-time or asynchronously.
No hardware restrictions. You can use the computing power and storage of the server that hosts the online C++ compiler.
Ability to learn from others. You can browse and run the code examples provided by the online C++ compiler or other users.

How to use an online C++ compiler

The steps to use an online C++ compiler are:

Select an online C++ compiler from the list below or search for one on the web.
Open the website of the online C++ compiler in your browser.
Write your code in the text editor or copy and paste it from another source.
Click the run button to compile and execute your code.
See the output or errors in the console or the output window.
If you want to take input from the user, enter it in the input box or the console.
If you want to save your code, click the save button or copy the URL of your code.
If you want to share your code, click the share button or copy and paste the URL of your code.

Best online C++ compilers in 2023

There are many online C++ compilers available on the web, but not all of them are equally good. Here are some of the best online C++ compilers that we recommend for beginners:

C++ Shell

C++ Shell is a simple and fast online C++ compiler that supports C++11, C++14, and C++17 standards. It uses GCC 9.2 as its backend compiler and allows you to choose between different optimization levels. It also supports syntax highlighting, auto-completion, code formatting, and error checking. You can run your code with or without input and see the output or errors in the console. You can save your code online and share it with others using a unique URL. You can also browse and run the code snippets provided by other users or the website. C++ Shell is a great online C++ compiler for beginners who want to learn and practice C++ quickly and easily. You can access C++ Shell at http://cpp.sh/.

Codepad

Codepad is a versatile and powerful online C++ compiler that supports C++98, C++03, and C++11 standards. It uses GCC 4.1.2 as its backend compiler and allows you to choose between different dialects and warnings. It also supports syntax highlighting, line numbers, indentation, and tabs. You can run your code with or without input and see the output or errors in the output window. You can save your code online and share it with others using a unique URL. You can also embed your code on a website or a blog using an iframe. Codepad is a great online C++ compiler for beginners who want to experiment and explore different features and aspects of C++. You can access Codepad at https://codepad.org/.

OnlineGDB

OnlineGDB is a comprehensive and advanced online C++ compiler that supports C++11, C++14, and C++17 standards. It uses GCC 7.4.0 as its backend compiler and allows you to choose between different optimization levels and debugging options. It also supports syntax highlighting, auto-completion, code formatting, error checking, and breakpoints. You can run your code with or without input and see the output or errors in the console or the output window. You can also use the graphical debugger to step through your code and inspect the variables and memory. You can save your code online and share it with others using a unique URL. You can also fork and clone other users’ code and collaborate with them in real-time. OnlineGDB is a great online C++ compiler for beginners who want to develop and debug complex and sophisticated C++ programs. You can access OnlineGDB at https://www.onlinegdb.com/online_c++_compiler.

Replit

Replit is a modern and user-friendly online C++ compiler that supports C++11, C++14, and C++17 standards. It uses Clang 7.0.1 as its backend compiler and allows you to choose between different themes and fonts. It also supports syntax highlighting, auto-completion, code formatting, error checking, and live reloading. You can run your code with or without input and see the output or errors in the console or the output window. You can also use the graphical user interface (GUI) to create interactive or graphical programs using libraries such as SDL2, SFML, or Qt5. You can save your code online and share it with others using a unique URL. You can also fork and clone other users’ code and collaborate with them in real-time. Replit is a great online C++ compiler for beginners who want to create and showcase fun and creative C++ projects. You can access Replit at https://replit.com/languages/cpp.

Godbolt

Godbolt is a unique and insightful online C++ compiler that supports C++11, C++14, C++17, and C++20 standards. It uses GCC 10.2 as its default backend compiler but allows you to choose from over 40 different compilers from various vendors and versions. It also supports syntax highlighting, auto-completion, code formatting, error checking, and assembly output. You can run your code with or without input and see the output or errors in the console or the output window. You can also see the assembly code generated by the compiler for your code in the assembly window. You can compare the assembly code of different compilers or different optimization levels side by side. You can save your code online and share it with others using a unique URL. You can also browse and run the code examples provided by the website or other users. Godbolt is a great online C++ compiler for beginners who want to learn and understand how C++ works under the hood and how compilers optimize their code. You can access Godbolt at https://godbolt.org/.

Conclusion

An online C++ compiler is a web-based tool that allows you to write, compile, and execute C++ code in your browser without installing any software on your computer. It has many benefits such as no setup, no configuration, no administration, accessibility, resource sharing, collaboration, no hardware restrictions, and learning from others.

In this article, we have explained what an online C++ compiler is, what are its benefits, how to use it, and what are the best online C++ compilers in 2023. We have recommended five online C++ compilers that are suitable for beginners: C++ Shell, Codepad, OnlineGDB, Replit, and Godbolt. Each of them has its own features and advantages that you can explore and enjoy. We hope that this article has helped you to learn more about online C++ compilers and how to use them for your C++ projects.

FAQs

Here are some frequently asked questions about online C++ compilers:

What is the difference between an online C++ compiler and an offline C++ compiler?

An online C++ compiler is a web-based tool that allows you to write, compile, and execute C++ code in your browser without installing any software on your computer. An offline C++ compiler is a software program that you have to download, install, and configure on your computer to write, compile, and execute C++ code.

What are the advantages of using an online C++ compiler over an offline C++ compiler?

Some advantages of using an online C++ compiler over an offline C++ compiler are:

No setup is needed. You don’t have to download, install, or update any software on your computer.
No configuration is required. You don’t have to worry about setting up the compiler options, paths, or libraries.
Administration is not required. You don’t have to deal with permissions, licenses, or security issues.
It is accessible from any location. You can use it from any device that has a web browser and an internet connection.
It is capable of sharing resources. You can easily share your code with others by sending them a link or embedding it on a website.
Collaboration is possible. You can work on the same code with others in real-time or asynchronously.
No hardware restrictions. You can use the computing power and storage of the server that hosts the online C++ compiler.
Ability to learn from others. You can browse and run the code examples provided by the online C++ compiler or other users.

What are the disadvantages of using an online C++ compiler over an offline C++ compiler?

Some disadvantages of using an online C++ compiler over an offline C++ compiler are:

Dependency on internet connection. You cannot use it if you have no or poor internet connection.
Limited control over compiler settings. You cannot customize the compiler options, paths, or libraries as much as you can with an offline C++ compiler.
Potential security risks. You have to trust the online C++ compiler provider with your code and data.
Possible compatibility issues. You may encounter some differences or errors when running your code on different online C++ compilers or on an offline C++ compiler.

How do I choose the best online C++ compiler for my needs?

The best online C++ compiler for your needs depends on various factors such as:

The standard of C++ that you want to use (C++11, C++14, C++17, or C++20).
The backend compiler that you prefer (GCC, Clang, MSVC, etc.).
The optimization level that you want to apply (O0, O1, O2, O3, etc.).
The debugging options that you need (breakpoints, variables, memory, etc.).
The graphical user interface (GUI) that you like (themes, fonts, tabs, etc.).
The libraries that you want to use (SDL2, SFML, Qt5, etc.).
The features that you value (syntax highlighting, auto-completion, code formatting, error checking, live reloading, etc.).
The sharing and collaboration capabilities that you desire (save, share, embed, fork, clone, etc.).

You can compare the online C++ compilers that we have recommended in this article based on these factors and choose the one that suits your needs the best. You can also try different online C++ compilers and see which one you like the most.

How do I download an online C++ compiler?

You cannot download an online C++ compiler as it is a web-based tool that runs on a server. However, you can download your code that you have written on an online C++ compiler and run it on an offline C++ compiler on your computer. To do that, you have to:

Save your code on the online C++ compiler or copy it to your clipboard.
Create a text file on your computer and paste your code into it.
Save the file with a .cpp extension (for example, hello.cpp).
Download and install an offline C++ compiler on your computer (for example, GCC, Clang, MSVC, etc.).
Open a terminal or a command prompt on your computer and navigate to the directory where you have saved your file.
Compile your file using the offline C++ compiler (for example, g++ hello.cpp -o hello).
Run your file using the executable name (for example, ./hello or hello.exe).

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