Creating my own headers in C++?

Hello all. I was wondering is there a way to create my own header files? Lets say I want to implant Binary Tree class. I don't want to copy and add BinaryTree.cpp and BinaryTree.h to each of my projects that will use it, instead I want to put the .h file in /usr/include and be able to write: #include <BinaryTree.h> In every project that needs it. But as you know I will get a bunch of errors (probably "unresolved external symbol"). So how it is possible to make this work?

Thanks a lot!

Personally, I choose to put my own header files in a custom directory and compile with -I option.

$ gcc -I [your-headerfile-directory-path] prgname.c

If it includes a .cpp file, it must be made into a library, and linked against. If there isn't much in the .cpp file, you can move it all to the .h file and just include it, assuming it is only a class definition.

Hey sorry. I thought it was C. So g++ it is, then!

davidbilla said: Personally, I choose to put my own header files in a custom directory and compile with -I option.

$ gcc -I [your-headerfile-directory-path] prgname.c

Correct! Or install your personal header files in /usr/local/include. If that directory does not exist, then create it. Similarly, personal library file(s) can go in /usr/local/lib.

personally I just add '-I ./' to the G++ command. makes G++ look in the current directory for includes.

Since I haven't tested it yet, I would like to ask one more thing: I put both files (.h & .cpp) in some folder that add -I to gcc/g++ with the folder were those files located and I'm done? No need to work with dynamic libraries (so called DLL's in win or SO's in unix [as far as I know])?

Thanks a lot gain!

extruct said: Since I haven't tested it yet, I would like to ask one more thing:

I put both files (.h & .cpp) in some folder that add -I to gcc/g++ with the folder were those files located and I'm done? No need to work with dynamic libraries (so called DLL's in win or SO's in unix [as far as I know])?

Thanks a lot gain!

Like I said before, if there is a .cpp file, it must be compiled into a library and linked against.

hessiess said: personally I just add '-I ./' to the G++ command. makes G++ look in the current directory for includes.

It should do that automatically. At least it does for me. No need to tell it to look in the current directory. I think the OP was wanting to avoid having to have a copy of the header in the same directory as every project he wants to include it into, anyway.