Include header file in different directory in c++

Question

I\'ve been learning c++ and encountered the following question: I have a directory structure like:

 - current directory

  - Makefile

  - include

     - he         


        

Answer 1

You can either add a -I option to the command line to tell the compiler to look there for header files. If you have header files in include/ directory, then this command should work for you.

gcc -Iinclude/

Since, you are using makefile, you can include this option in CFLAGS macro in your makefile.

CFLAGS = -Iinclude/ -c -Wall

OR

You can include header files using #include "../include/header.h".

Answer 2

Perhaps change your include line:

#include "include/header.h"

Assuming that's where your header exists - I'm making that assumption from your makefile

Answer 3

You told the Makefile that include/header.h must be present, and you told the C++ source file that it needs header.h … but you did not tell the compiler where such headers live (i.e. in the "include" directory).

Do this:

CFLAGS = -c -Wall -Iinclude