Using header files in C [closed]
Closed. This question is off-topic . It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I'm having a couple of issues including custom libraries in my program I have my main.c file and a library.c (where all the functions are stored) and library.h (where all the prototypes are stored). In main.c I'm placing #include "library.h" but the functions don't get recognized when I try to compile. Am I doing something wrong? I'm using GCC to build the file. test.c: #include "library.h" int main() { int num