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Date: | Sat, 04 Jun 2011 17:24:46 +0300 |
From: | Eli Zaretskii <eliz AT gnu DOT org> |
Subject: | Re: Different memory allocations were to the same location |
In-reply-to: | <isddd8$h1k$1@news.albasani.net> |
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> From: Mok-Kong Shen <mok-kong DOT shen AT t-online DOT de> > Date: Sat, 04 Jun 2011 15:53:56 +0200 > Bytes: 1681 > > Am 04.06.2011 15:48, schrieb Eli Zaretskii: > > > In generateintvec, you free the memory allocated by the previous call, > > so the same address is now available for reuse. Therefore calloc > > happily reuses it. > > > > Why is that a problem? > > But it should free the memory of that varialbe reprensented by the > formal parameter at the time of function call, shouldn't it? (In the > two calls uh was associated to different actual parameters.) C passes variables by value, so the original allocation is not affected. You must pass a pointer to a value be able to modify that value.
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