How we could include header file that is not in the same folder as current file ?

I am studying "audio example" in "stm32f4cube mcu package".

In main.h file:

#include "stm32f411e_discovery.h"

How is this posible ?. "stm32f411e_discovery.h" file and "main.h" file are not in the same folder.

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Graduate II

How is it possible that in the 21st century there are still so many illiterates, who can't even express themselves?

Visitor II

I'm feel so sorry.

In the "main.h" file, how we can include "stm32f411e_Discovery.h"

The file is in Drivers/BSP/STM32F411E-Discovery folder, not the same folder as "main.h". It is in example project folder.

In addition, why aren't header files in the same folder with source files ?

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