c - Googletest compile fails on defining a struct in #imported file -

i have 2 files, first_pass.c includes mystring.h describes mystring.c. while testing first_pass.c did following includes

#include "../src/mystring.c" #include "../src/first_pass.c" #include <gtest/gtest.h> 

everything worked well, until had define structure in mystring.h. simple that

typedef struct split {     char *head;     char *tail; }split; 

and started fail while compiling on error: ‘split’ has previous declaration ‘typedef struct split split’

the requirements course using c (not c++) , make, other testing frameworks, check deprecated. understand defines twice struct, first time when loads mystring.c , on first_pass.c. can it?

use header guards prevent inclusion of headers more once.

http://en.wikipedia.org/wiki/include_guard

one suggestion add header files c files not c files c file.