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Article #53645Re: Is this sscanf a valid construct?
From: Richard Tobin
Date: Fri, 20 Sep 1991 13:38
Date: Fri, 20 Sep 1991 13:38
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950 bytes
> Is the following code valid C: > char *s = "abcd"; > sscanf( string, " %c %c", &s[0], &s[1] ); > But with GNU gcc, I get > abcd > Segmentation fault (core dumped) You're trying to modify a literal string. By default, gcc stores these in a read-only area, so you can't modify them. If you compile with the flag -fwritable-strings it will work as expected. -- Richard
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 11318c,ed55ad3eb93288ba X-Google-Attributes: gid11318c,public X-Google-ArrivalTime: 1991-09-21 08:53:14 PST Path: arc1-ca.pugleaf.net!gmdzi!unido!mcsun!uunet!cis.ohio-state.edu!aiai.edinburgh.ac.UK!richard From: richard@aiai.edinburgh.ac.UK (Richard Tobin) Newsgroups: gnu.gcc.help Subject: Re: Is this sscanf a valid construct? Message-ID: <16629.9109201338@subnode.aiai.ed.ac.uk> Date: 20 Sep 91 13:38:55 GMT Sender: daemon@cis.ohio-state.edu Distribution: gnu Organization: GNUs Not Usenet Lines: 15