How to define an array of strings of characters in header file?

Question

I have many different 3 axis sensors I am writing test code for. In the C files for each of them, I have the same char string defined:

char axis[3][8] = {\"X\",          


        

Answer 1

In order to avoid linker errors, you have to declare your array as extern in a header file, and then define the array once in one of your code modules.

So for instance:

//myheader.h
extern const char* axis[3];

then in another code module somewhere:

//myfile.c
const char* axis[3] = { "X", "Y", "Z" };