How to include a file from another folder?

Question

In my current project I have separated my class files and my header files. My project structure currently looks like this:

• Project

• • Source

Answer 1

Assuming you want class1.cpp to include class1.h you would do something like this

#include "../../Header/class1.h"

The .. tells the tells the OS to jump 1 directory up when the compiler asks for the file.

Answer 2

I had a very similar problem where my compiler could not find the header with a code::blocks C++ project (same file structure as OP) .

This worked for me:

#include "../include/class1.h"

Answer 3

You need to indicate the include path <the directory containing Project> to your compiler so that the compiler is able to find the included headers. Using gcc, you could use -I option, and using visual studio, you could use /I.