为什么我没有使用sched.h,可是编译的时候会有cannot open file sched.h
仅供参考：
C:\Users\Administrator\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu16.04onWindows_79rhkp1fndgsc\LocalState\rootfs\usr\include\sched.h
C:\Users\Administrator\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu16.04onWindows_79rhkp1fndgsc\LocalState\rootfs\usr\include\linux\sched.h
C:\Users\Administrator\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu16.04onWindows_79rhkp1fndgsc\LocalState\rootfs\usr\include\x86_64-linux-gnu\bits\sched.h
D:\Qt\5.15.2\Src\qtwebengine\src\3rdparty\chromium\third_party\crashpad\crashpad\compat\android\sched.h
D:\Qt\Tools\mingw810_32\i686-w64-mingw32\include\sched.h
D:\Qt\Tools\mingw810_64\x86_64-w64-mingw32\include\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-arm\usr\include\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-arm\usr\include\linux\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-arm\usr\include\linux\sunrpc\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-mips\usr\include\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-mips\usr\include\linux\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-mips\usr\include\linux\sunrpc\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-x86\usr\include\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-x86\usr\include\linux\sched.h
D:\Users\Public\Documents\RAD Studio\12.0\PlatformSDKs\android-ndk-r8e\platforms\android-14\arch-x86\usr\include\linux\sunrpc\sched.h