How to combine two example programs based on ESP32 freertos

[jaewon]

Hello. I am new to ESP32.
I'm testing the Freertos example programs, and I want to combine the two example programs into one and run it.
What should I do?
First, I copied the .h files and .c files in the main folder into one project, and added the .c files added to the contents of the cmakelist.txt file.
Unfortunately, an error occurs during the compilation phase.

Is there anything else I need to deal with?