Use global Struct in other files

[danielcsgomes]

Hy guys,

I have a struct defined in one file:

struct.cpp

#include <stdio.h>

#include <stdio.h>

typedef struct _ZONA
{
int preco;
int numero;
int numLugaresVendidos;
int numLugares;
}ZONA;

ZONA _zona1;
ZONA _zona2;

How do i declare the _zona1 and _zona2 in other files to work with the same variables?

I know if i use a var like this:

int var;

to use in other file i do:

extern int var;

but i tried using:

extern ZONA _zona1;

but it give errors.

Thanks,

Daniel Gomes

[Zaita]

You should declare the struct in a header file. Then include that header file within source files you want to use.

If you want to use the same instance, then you can use the extern keyword.

[danielcsgomes]

Thanks for your reply Zaita.

Zaita, can you show me a little example how to create the header file? I don't know how to create it.

Thanks,

Daniel Gomes

[Zaita]

ZONA.h

#ifndef ZONA_H_
#define ZONA_H_

// Global Headers
#include <stdio.h>

typedef struct ZONA {
int preco;
int numero;
int numLugaresVendidos;
int numLugares;
};

#endif /* ZONA_H_ */ 

Now you can use
#include "ZONA.h"

[danielcsgomes]

Thanks Zaita, it works fine :)