Extern variable error in C++

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i have a variable

C++

char buf_temp[10];

It is defined global in a.cpp file and in b.cpp i am using

C++

extern char buf_temp[10];

But when i compile the code i get and error that :-

b.obj : error LNK2005: "char * data" (?data@@3PADA) already defined in a.obj

Why is it so?
How to remove it?

Posted 11-Sep-12 3:58am

Tarun Batra

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Espen Harlinn · Accepted Answer · 2012-09-11T04:06:00

Solution 2

buf_temp is probably not your problem, the linker is reporting multiple instances of char * data.

Best regards
Espen Harlinn

Posted 11-Sep-12 4:06am

Espen Harlinn

pasztorpisti · Accepted Answer · 2012-09-11T04:07:00

Solution 3

That should work fine. Make sure you put the definition char buf_temp[10] into a.cpp and put the extern declaration to a.h. Then you should include a.h everywhere you use the stuff.

Posted 11-Sep-12 4:07am

pasztorpisti