创建.h文件,命名为unistd.h,内容为:
/** This file is part of the Mingw32 package.
unistd.h maps (roughly) to io.h
*/
#ifndef _UNISTD_H
#define _UNISTD_H
#include <io.h>
#include <process.h>
#endif /* _UNISTD_H */
存放在VS安装目录:C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\Tools\MSVC\14.33.31629\include 文件夹下