如何正确添加到路径中?

但是，当我尝试编译一个示例时，出现了以下错误： g++ -o detect-camera detect-camera.cpp
-I../include -I/usr/include/opencv4
-L../lib -lfacedetectcnn
pkg-config --cflags --libs opencv4 detect-camera.cpp:41:10: fatal error: facedetectcnn.h: No such file or directory 41 | #include "facedetectcnn.h" | ^~~~~~~~~~~~~~~~~ compilation terminated.