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#17292 - 06/17/06 06:39 AM A problem about define~~..
Linus Shen Offline
Junior Member

Registered: 06/15/06
Posts: 7
Loc: China
who can tell differ from "int" and "extern int"? "the C++ Primer" says ,"extern int" is always written in the header files?..
thanks!!
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#17293 - 06/17/06 06:12 PM Re: A problem about define~~..
Gremelin Offline

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Registered: 02/28/02
Posts: 7192
Loc: Portland, OR; USA
I believe that External (or Global) Integers (extern int) are able to be used outside of a function, whereas a standard integer is supposed to be used inside of a function.

(keep in mind, I'm in no way a cpp programmer, i simply know how to google things properly to have a proper outcome)
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#17294 - 06/18/06 04:21 AM Re: A problem about define~~..
Linus Shen Offline
Junior Member

Registered: 06/15/06
Posts: 7
Loc: China
Also I still haven't really got it,but THANKS indeed!
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#17295 - 06/24/06 01:51 PM Re: A problem about define~~..
nick feng Offline
Junior Member

Registered: 06/24/06
Posts: 1
Loc: china
extern int a;
means the 'a' was defined in some other files .

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