Missing "Math.h" file issue

[martinye77]

The native-lib.cpp need to include "Math.h" in line 15, but the Android Studio (3.0.1) just can't find the file. Can anyone kindly tell me if I need to install other library to fix this issue? Thanks.
Further more, I have tried to comment out this line and run the app in LG G4 mobile, it will crash at "Caffe::set_mode(Caffe::CPU);" in the "caffe_mtcnn::load_model(const std::string &proto_model_dir)" function. How can I make the caffe work properly? Thanks again.