在 Visual Studio 中编译代码，报如下错误：
warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss表明有非 ASCII 字符存在于文件中。通过如下正则表达式，可以找到该非 ASCII 字符：
[^\x00-\x7f]在 Visual Studio 中编译代码，报如下错误：
warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss表明有非 ASCII 字符存在于文件中。通过如下正则表达式，可以找到该非 ASCII 字符：
[^\x00-\x7f]