1. C++ shell

C++ Shell v2
https://cpp.sh/
https://cpp.sh/about.html

C++ Shell v2, free online compiler, proudly uses emscripten to compile your code.

emscripten is a clang-based compiler toochain that produces WebAssembly code, which can run directly in most modern browsers.

Using cpp.sh, your code is compiled on the server, and its wasm-code equivalent is produced. This code is then safely run locally in a Web Worker on your own browser.

Please, note that due to the limitations of the target platform, certain system calls may fail.
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2. Example program

// Example program
#include <iostream>
#include <string>

int main()
{
  std::string name;
  std::cout << "What is your name? ";
  getline (std::cin, name);
  std::cout << "Hello, " << name << "!\n";
}

3. Options

4. Execution

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References

[1] Yongqiang Cheng, https://yongqiang.blog.csdn.net/
[2] C++ shell, https://cpp.sh/