C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  please give me more examples about c_faq 2.6 ?          C++Talk.NET Forum Index -> C Language (Moderated) View previous topic :: View next topic   Author Message guoliang Guest Posted: Sat Apr 28, 2007 1:58 am    Post subject: please give me more examples about c_faq 2.6 ? hi: why some code use this define: struct name { int namelen; char namestr[1]; }; and how to use it? how to substitute it by standard method ? thanks! -- comp.lang.c.moderated - moderation address: clcm (AT) plethora (DOT) net -- you must have an appropriate newsgroups line in your header for your mail to be seen, or the newsgroup name in square brackets in the subject line. Sorry. Back to top Barry Schwarz Guest Posted: Tue May 01, 2007 9:11 am    Post subject: Re: please give me more examples about c_faq 2.6 ? On 27 Apr 2007 20:58:22 GMT, "guoliang" <poster.gil (AT) gmail (DOT) com> wrote: Quote: hi: why some code use this define: struct name { int namelen; char namestr[1]; }; and how to use it? how to substitute it by standard method ? Google the phrase "struct hack" Remove del for email -- comp.lang.c.moderated - moderation address: clcm (AT) plethora (DOT) net -- you must have an appropriate newsgroups line in your header for your mail to be seen, or the newsgroup name in square brackets in the subject line. Sorry. Back to top jg Guest Posted: Tue May 01, 2007 9:11 am    Post subject: Re: please give me more examples about c_faq 2.6 ? On Apr 27, 1:58 pm, "guoliang" <poster....@gmail.com> wrote: Quote: hi: why some code use this define: struct name { int namelen; char namestr[1]; }; and how to use it? how to substitute it by standard method ? You can have a variable-size struct. For example, struct names *p1 = malloc(sizeof(name1) + sizeof(name1) -1); // ignore alignments.... This way, you can have a compack representation of names.. JG -- comp.lang.c.moderated - moderation address: clcm (AT) plethora (DOT) net -- you must have an appropriate newsgroups line in your header for your mail to be seen, or the newsgroup name in square brackets in the subject line. Sorry. Back to top Joel C. Salomon Guest Posted: Mon May 07, 2007 9:12 am    Post subject: Re: please give me more examples about c_faq 2.6 ? Quote: struct name { int namelen; char namestr[1]; }; You can have a variable-size struct. For example, struct names *p1 = malloc(sizeof(name1) + sizeof(name1) -1); // ignore alignments.... I had to work with a software library once (EVA) where /every/ structure was only partly defined because there were variable-length arrays of structures of variable length including /multiple/ variable-length arrays of… They didn't even have the courtesy of including the macros that might have made unpacking these structures reasonable. --Joel -- comp.lang.c.moderated - moderation address: clcm (AT) plethora (DOT) net -- you must have an appropriate newsgroups line in your header for your mail to be seen, or the newsgroup name in square brackets in the subject line. Sorry. Back to top Guest Posted: Mon May 07, 2007 9:12 am    Post subject: Re: please give me more examples about c_faq 2.6 ? On Apr 28, 1:58 am, "guoliang" <poster....@gmail.com> wrote: Quote: hi: why some code use this define: struct name { int namelen; char namestr[1]; }; and how to use it? how to substitute it by standard method ? thanks! -- comp.lang.c.moderated - moderation address: c...@plethora.net -- you must have an appropriate newsgroups line in your header for your mail to be seen, or the newsgroup name in square brackets in the subject line. Sor if u are using struct then u are combining too many data type into single which is defined......u have given name this user defined struct with name .. u can access it as in main we define it as name n1; scanf("%d",n1.namelen) -- comp.lang.c.moderated - moderation address: clcm (AT) plethora (DOT) net -- you must have an appropriate newsgroups line in your header for your mail to be seen, or the newsgroup name in square brackets in the subject line. Sorry. Back to top WillerZ Guest Posted: Wed May 09, 2007 10:37 pm    Post subject: Re: please give me more examples about c_faq 2.6 ? er.apoorva (AT) gmail (DOT) com wrote: Quote: On Apr 28, 1:58 am, "guoliang" <poster....@gmail.com> wrote: hi: why some code use this define: struct name { int namelen; char namestr[1]; }; and how to use it? how to substitute it by standard method ? thanks! -- comp.lang.c.moderated - moderation address: c...@plethora.net -- you must have an appropriate newsgroups line in your header for your mail to be seen, or the newsgroup name in square brackets in the subject line. Sor if u are using struct then u are combining too many data type into single which is defined......u have given name this user defined struct with name .. u can access it as in main we define it as name n1; scanf("%d",n1.namelen) In addition to being nigh-on incomprehensible, your response is also wrong. struct name { /*...*/ }; Does not, in C, define a type called "name". It does in C++, but this isn't a C++ newsgroup is it? -- comp.lang.c.moderated - moderation address: clcm (AT) plethora (DOT) net -- you must have an appropriate newsgroups line in your header for your mail to be seen, or the newsgroup name in square brackets in the subject line. Sorry. 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