How to use a defined struct from another source file?

Question

I am using Linux as my programming platform and C language as my programming language.

My problem is, I define a structure in my main source file( main.c):

Answer 1

Header file /* include this header file in both file1.c and file2.c

strcut a {

};

struct b {

}; 

so header file included the declaration of both structures .

file 1.c 

strcut a xyz[10]; --> struct a defined here

to use struct b here in this file

extern struct b abc[20];

/* now can use in this file */

file2.c

strcut b abc[20]; /* defined here */

to use strcut a defined in file1.c

use extern struct a xyz[10]