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Re: [CPROG] Extern funktion

On Mon, 19 Jun 2000 16:26:14 +0200, Peter Gylling <sslug@sslug> wrote:
>--SNIP--
>Den ekterne funtion er som følger:
>--SNIP--
>/* Kaldes fra main.c */
>func_check(int tjek)
>{
>  
>  ++tjek;
>}
>--SNIP--
>Når dette kompileres med gcc fås output af tjek til tjek=5, men 
>hvorfor det?

For func_check's parameter er call by value, og ikke call by reference. Hvis du
fil have resultatet til at være 6, skal typen af func_check være:

func_check(int &tjek)

Så arbejder du ikke længere på en kopi af variablen men på selve variablen.

-- 
Anders Bo Rasmussen          mailto:sslug@sslug
Frimestervej 42 1.tv         http://www.image.dk/~abr
2400 Kbh. NV
Denmark

 
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