浏览器里的 C++

clang 在你的浏览器里编译，源码不会上传。单次运行限时 5 秒。原理和限制写在这篇笔记。

// playground.cc

> vim main.cpp

Write C/C++ freely in the left editor, then click run to compile and execute. Examples are for reference only; stdin is only needed when your program reads input.

file: main.cppexampletoolchain: loading

loading toolchain0%

main.cppMonaco · CPP

stdin (optional · for cin / scanf)

stdout / stderr · idle

Run your code to see output here.

// man playground

- The main editor accepts any C/C++ code; drafts are saved locally in your browser.
- The example dropdown loads reference code only; it does not limit editing.
- stdin is only required when your program reads input; leave it empty for hello world.
- Shortcut: Cmd/Ctrl + Enter to run; execution stops automatically after 5 seconds.
- Compile errors show structured diagnostics; click to jump to the line.
- Share copies a gzip-compressed link (?lang=cpp&z=...) that restores code and stdin.

// playground.cc

> make toolchain

// loading playground...