Solve fatal error: helper_math.h: No such file or directory

This error occurs when the compiler cannot find the helper_math.h file. Here are some steps you can take to solve this error:

1. Check if the CUDA toolkit is installed and properly configured on your system. The helper_math.h file is part of the CUDA toolkit, so make sure it's installed and properly configured.

2. Check if the file exists in the correct directory. The helper_math.h file should be located in the CUDA toolkit include directory. Check if the file exists in the correct directory, and if not, try reinstalling the CUDA toolkit.

3. Check if the include path is set correctly. Make sure that the include path for the CUDA toolkit is set correctly in your project's build settings.

4. If you're using an IDE, make sure that the IDE is properly configured to use the CUDA toolkit.

5. If none of the above steps work, try including the file with its full path in your code, like this:

#include </usr/local/cuda/include/helper_math.h>

Make sure to replace the path with the correct path to the helper_math.h file on your system.