external structure declaration

hey guys!
Im trying to declare a struct form other file but compiler says theres an error on declaration

file1.c

Code:

---

struct {
        char entry[65536][128];
} hosts;

---

file2.c

Code:

---

how do I declare the global struct here?

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Put the structure defnation inside a header file and #include it in both .c files

Also the way you have it would make it a global or local variable (depending on where it is). To change it to a proper defination move the name:

Code:

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struct hosts{
  char entry [65536][128];
};

---

Then you can assign variables to that type:
struct hosts host1;

If it is suppose to be a variable then you will need to do something like this:

Header:

Code:

---

typedef struct {
  char entry [65536][128];
}HOSTS;

---

File1.c

Code:

---

HOSTS hosts;
func1(&hosts);

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File2.c (for the function)

Code:

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void func1(HOSTS *rec_hosts)

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this is the only way?
i dont know to create .h files. Is it like .c files?

Quote:

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this is the only way?

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No, but the other ways are much more evil.

Quote:

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i dont know to create .h files. Is it like .c files?

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Kinda of. However in the .h (header) files you normally only put function prototypes, type definations, and any macros.

An example would be:

Code:

---

/* Check to see if this header has been included or not */
#ifndef MY_HEADER_
/* If it hasn't then it will define a macro to mark that its been included already. 
If it has then it will go to the #endif */
#define MY_HEADER_

typedef struct {
  char entry [65536][128];
}HOSTS;
#endif

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Then you would save it as myheader.h and inside your C files you would:

Code:

---

#include "myheader.h"
/* Note the use of " " instead of < > */

---

and then both files would have access to the type HOSTS which will allow you to freely pass data of that type around between the two files.

Thank you Thantos!

... and don't forget to read up about the extern keyword.