Redefinition variable in header file \

[ciccioc74]

Hi i'm new of mikroC pro
i use rev 4.0.0. for pic 32
i have a error with my very simple program
main.c

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#include "NewUnit_0.h"
void main() {
   int i=0;
   pippo=0;
}

secondFile.c

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#include "NewUnit_0.h"
void temp(){
   pippo=1;

}

NewUnit_0.h

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#ifndef EXAMPLE_H
#define EXAMPLE_H

extern float pippo=32;

#endif /* EXAMPLE_H */

when i compile i have a error
4 355 Redefinition of 'pippo [secondFile.c] pippo' already defined in 'multifile2.c' secondFile.c
0 355 Redefinition of '?ICS_pippo [secondFile.c] ?ICS_pippo' already defined in 'multifile2.c' secondFile.c


my question:
how can i use a variable from multiple files?
i wish a simple example
tanks

[ciccioc74]

thi is the project

[PeDre]

I think you're missing the definition of the variable.

main.c

Code: Select all

#include "NewUnit_0.h"

float pippo=32;

void main() {
   int i=0;
   pippo=0;
}

[ciccioc74]

tank for the reply but the definition is in the header file...

[PeDre]

The header file contains the declaration.
The variable is defined at one place, but declares it wherever you use it.

Refer to the help file under "extern".

[ciccioc74]

ok the correct version
main

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#include "NewUnit_0.h"
float pippo=32
void main() {
   int i=0;
   pippo=0;
}

secondFile.c

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#include "NewUnit_0.h"
void temp(){
   pippo=1;

}

NewUnit_0.h

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#ifndef EXAMPLE_H
#define EXAMPLE_H

extern float pippo;

#endif /* EXAMPLE_H */

[filip]

Hi,

Try the corrected project in the attachment.

Regards,
Filip.

[ciccioc74]

grazie