From:	Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Anomolies old Gcc allowed(also problem)
Organization:	Pin Eight Software http://pineight.8m.com/
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On Sat,  2 Sep 2000 01:40:18 -0400, James W Sager Iii
<sager+@andrew.cmu.edu> wrote:

>Mp is a structure containing:
>
>int *blk;
>int *vt_wall;
>int *hz_wall;
>
>
>Mp.blk=realloc(Mp.blk,10000*4*Mp.max);
>Mp.vt_wall=realloc(Mp.vt_wall,10000*4*Mp.max);
>Mp.hz_wall=realloc(Mp.hz_wall,10000*4*Mp.max);
>
>Recieved compiler errors:
> ) Error: ANSI C++ forbids implicit conversion from `void *' in assignment
> ) Error: ANSI C++ forbids implicit conversion from `void *' in assignment
> ) Error: ANSI C++ forbids implicit conversion from `void *' in assignment
>
>What does the above mean?

It means you're trying to assign a void *value to a
something_else *variable.  ANSI C++ doesn't allow this.

>Does it mean I need to malloc before I remalloc?

It means you should be using new and delete instead of malloc() in a
C++ program.

>This would require a coding overhaul on code I forget.
>I can't find any solution but this, yet I find it odd
>a programming language would switch conventions...

C++ had no conventions until ANSI C++.  GCC simply adopted the
standard convention.

>Upgrading from my ghetto version of Djgpp to the newer one, I noticed
>some odd things the previous compiler let me play off.

That's because those "odd things" are violations of ANSI C++, such as:

>*It allowed me to give content for a constructor of a class without
>specifying in the .h that there was a constructor to begin with.
>
>*(allegro only) Allowed direct access to datafiles when using the
>blit command.

This is the same problem as (void *)crap.  Allegro is a C library.
You have to cast.

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