[几个在线编程环境,特别是 C语言或者JAVA语言测试代码使用效果好]

1. https://tool.lu/coderunner/ (在线工具，它支持几乎所有主流编程语言。 )

2. http://www.dooccn.com/cpp/

3. http://www.tutorialspoint.com/compile_cpp11_online.php (Compile and Execute C++11 Online)

4. http://codepad.org/ (codepad)

5. http://jsrun.net/cpp/new (JSRUN)

6. https://c.runoob.com/compile/12 (菜鸟工具)

7. https://ideone.com/

8. https://mp.csdn.net/postedit/89355619 (C++ Shell)