RE: [Dev-C++] Newbie linking errors: 'undefined reference'

[Ioannis V. <no...@ya...>]

> -----Original Message-----
> From: Ioannis Vranos [mailto:no...@ya...] 
> Sent: Sunday, February 10, 2002 12:10 AM
> To: Dev-C++ (dev...@li...)
> Subject: RE: [Dev-C++] Newbie linking errors: 'undefined reference'
> 
> 
> Had you included the .cpp file in the project? Also if you 
> have the definition of a class in a .cpp file you must 
> include a declaration of the class in the scope you use it. 
> For example:
> 
> 
> in the a.cpp file:
> 
> class A
> {
>  // definition
> };
> 
> 
> in the file you use it:
> 
> 
> class A;
> 
> A a;
> //..



This is a mistake. You must provide the class definition in every
compilation unit (file) before its use. So better put the class
definition in a header file.



Ioannis
 
* Ioannis Vranos
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