Hello, I am having linker problems. I want to have all my classes nicely defined in their own files. Just to test out the method I began with the following. I made a simple test class called bird in a seperate file called bird.h bird.h ---------------------------------- #ifndef _BIRD_H #define _BIRD_H class bird { public: bird(); }; #endif --------------------------------- then I made a bird.cpp to hold the code bird.cpp -------------------------------- #include "bird.h" bird::bird() { }; ---------------------------------- the main looked like this main.cpp -------------------------------- #include <iostream.h> #include "bird.h" bird test; void main() { }; --------------------------------- All that ran well, so I decided to expand on this and make another class, a vector class. vector.h ------------------------------- #ifndef _VECTOR_H #define _VECTOR_H class vector { public: vector(); }; #endif ------------------------------- and a vector.cpp vector.cpp ------------------------------ #include "vector.h" vector::vector() { }; ----------------------------- and that ran fine. SO i modified the bird class to include a vector new bird.h --------------------------- #ifndef _BIRD_H #define _BIRD_H #include "vector.h" class bird { public: vector position; bird(); }; #endif -------------------------- and now everything doesnt work, How can i make a class that uses another class. This is so confusing, what if I needed a class that used opengl functions, how would include everything. I hope you understand my problem. Please, help.

that code should work. I guess you are not putting vector.h and vector.cpp files into your project workspace..

if you are not, for vc++ you should say from menu insert->add files to project, or sth like that..

if you are doing that, can you tell the errors you have when you compile..

hope that helps..

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my quote is under construction

that worked actually. Thank you. =)