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Article #1241

Re: C Set/2 Question in malloc

#1241
From: David Charlap
Date: Fri, 28 Aug 1992 21:09
37 lines
1919 bytes
In article <9208281644.AA10538@ucbvax.Berkeley.EDU> LANSCHE@TOROLAB6.VNET.IBM.COM ("Martin Lansche") writes:
>   I saw your append in the comp.os.os2.programmer forum.  I believe that
>I can help.  C Set/2 is an ANSI compliant "C" compiler.  Sun's compiler
>is K&R "C". The ANSI definition for malloc is:
>
>void * malloc(size_t);
>
>While the K&R definition is:
>
>char * malloc();
>
>K&R compilers will not complain about implicit casts between potentially
>different sized pointers.  ANSI compilers do.  To explain the messages
>
>- (12,15) gives the line number (12) and the column number (15)
>containing the operation that is illegal.
>- (12,10) says the the operand is at column 10
>- and (12,17) says the 2nd operand is at column 17
>All of this is supposed to help you determine exactly where the error is
>and to what the messages are referring.
>
>To fix the problem, add a cast to the malloc, i.e.
>
>array= (long *) malloc(50*sizeof(long);

But (void *) variables are supposed to be assignment compatible with
all pointers.  Something's wrong here if that's required.

I just compiled that sample code under Unix with gcc 2.1 (using the
-ansi and -pedantic options) and it compiled fine.


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Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!rutgers!njitgw.njit.edu!hertz.njit.edu!dic5340
From: dic5340@hertz.njit.edu (David Charlap)
Newsgroups: comp.os.os2.programmer
Subject: Re: C Set/2 Question in malloc
Message-ID: <1992Aug28.210957.27794@njitgw.njit.edu>
Date: 28 Aug 92 21:09:57 GMT
References: <9208281644.AA10538@ucbvax.Berkeley.EDU>
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