If you compiled the program with the -g option (I think it's the same
option in g++ and CC) then you can type dbx a.out which is a debugger.
Once in the debugger type where.  Most times that will give you a trce of
what the program was doing when it crashed, usually you'll even get line
numbers to tell you where it died.
Compiling with the -Wall option will also help, it turns all the warnings
on.

 --Joe

> I know that a core dump is a memory dump to the harddisk. How can I use this
> to ? How do I use the core file to determine where the bug is ?
> 
>                                       Regards, Johan
> 
> De Messemaeker Johan
>       HEMMIS n.v.
>       Koning LeopoldIII-laan 2, 8500 Kortrijk
>       Tel.: 32 (0)56/37.26.37
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> 

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