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UNKNOWN ERROR!!!!!! phat3-Jan-02 22:17 phat 3-Jan-02 22:17  I am currently working on a project dealing with Client and Server program using API Socket. There are no problems for sending and receiving messages although I always get unknown error when the program ends..... Is there any possibility for built-in class in Visual Studio to be a problem?? cuz i am using fflush.c which is included in Microsoft Visual Studio\VC98\CRT\SRC\fflush.c !!!!! Below is my code and please see closely 14 th line. /*** *fflush.c - flush a stream buffer * * Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved. * *Purpose: * defines fflush() - flush the buffer on a stream * _flushall() - flush all stream buffers * *******************************************************************************/ 1 static int __cdecl flsall ( 2 int flushflag 3 ) 4 { 5 REG1 int i; 6 int count = 0; 7 int errcode = 0;8 9 10 _mlock(_IOB_SCAN_LOCK); 11 12 for ( i = 0 ; i < _nstream ; i++ ) { 13 14 if ( (__piob != NULL) && (inuse((FILE *)__piob)) ) { 15 16 #if def _MT /* * lock the stream. this is not done until testing * the stream is in use to avoid unnecessarily creating * a lock for every stream. the price is having to * retest the stream after the lock has been asserted. */ _lock_str2(i, __piob); ------------------------------------------------------------------------------------------- line 14 error First-chance exception in Step2Client.exe: 0xC0000005: Access Violation. __piob 0x00000000 _nstream 512 i 0 what syntax is this? hex3-Jan-02 19:28 hex 3-Jan-02 19:28  i am a beginner in programming,and i am learning c++; today i find the following lines ,i dont know the syntax like this : static _Interface* GetInterfacePtr() throw() { return NULL; } anybody waste some time to help me? thanks in advance Re: what syntax is this? Michael Dunn3-Jan-02 19:37 Michael Dunn 3-Jan-02 19:37  Which parts don't you understand? --Mike-- My really out-of-date homepage Buffy's on. Gotta go, bye! Sonork - 100.10414 AcidHelm Big fan of Alyson Hannigan. Re: what syntax is this? hex3-Jan-02 19:46 hex 3-Jan-02 19:46  i dont understand the " throw() ",does it break the definition of the function GetInterfacePtr()? thanks Re: what syntax is this? Michael Dunn3-Jan-02 19:58 Michael Dunn 3-Jan-02 19:58  Ah, ok, that indicates to the compiler that the function never throws any exceptions. --Mike-- My really out-of-date homepage Buffy's on. Gotta go, bye! Sonork - 100.10414 AcidHelm Big fan of Alyson Hannigan. Re: what syntax is this? hex3-Jan-02 20:11 hex 3-Jan-02 20:11  then if it is "throw (type)" ,what is the meaning ? would you please tell me where i can find the explanation of the syntax ? thanks Re: what syntax is this? markkuk3-Jan-02 23:36 markkuk 3-Jan-02 23:36  It would mean that the function may throw only exceptions of class "type". Look up "exception specification" in some proper C++ reference. Exception specifications aren't supported by VC++6. Re: what syntax is this? Michael Dunn4-Jan-02 8:03 Michael Dunn 4-Jan-02 8:03  markkuk wrote: Exception specifications aren't supported by VC++6. You sure about that? The first hit in MSDN when searching for "exception specification" shows examples of VC code using exception specifications. --Mike-- My really out-of-date homepage Buffy's on. Gotta go, bye! Sonork - 100.10414 AcidHelm Big fan of Alyson Hannigan. Re: what syntax is this? Carlos Antollini4-Jan-02 8:11 Carlos Antollini 4-Jan-02 8:11  Michael may be this gauy is confused for the following: Microsoft Specific —> Microsoft C++ does not support the function exception specification mechanism, as described in section 15.4 of the ANSI C++ draft. I found that in the MSDN under Exception Handling Syntax It's a little confuss butc don't said that VC doesn't support Exception specifications... Reagards... Today is Friday!!! and Party!!! Carlos Antollini. Sonork ID 100.10529 cantollini Re: what syntax is this? Nemanja Trifunovic4-Jan-02 8:16 Nemanja Trifunovic 4-Jan-02 8:16  If you declare something like: void SampleFunction(void) throw (int) { } and compile, you will get warning C4290: C++ Exception Specification ignored I vote pro drink Re: what syntax is this? Nish Nishant3-Jan-02 20:42 Nish Nishant 3-Jan-02 20:42  I am not sure a raw beginner should be directly jumping into COM. Anyway good luck! Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Memory Mapping 3-Jan-02 19:07 3-Jan-02 19:07  I have huge files (<100Mb ) and want to map a number of the to mem. First up How do I determine where to start to map in memory? I am using NT so how do I know how much it is using. And if you can help , how would you go about mapping large files in the first place? Thanks Re: Memory Mapping Philip Patrick4-Jan-02 2:52 Philip Patrick 4-Jan-02 2:52  The functions will tell you exactly where the mapping starts. Use CreateFileMapping() to create a mapping to file and MapViewOfFile() to load a portion (or all file) into memory. The last function will return you LPBYTE, points to the start of mapping Look for descriptions of the functions in MSDN. Philip Patrick "Two beer or not two beer?" <shakesbeer> Web-site: www.saintopatrick.com List files in a directory Marcus Spitzmiller3-Jan-02 16:19 Marcus Spitzmiller 3-Jan-02 16:19  Anyone know of a good class to enumerate all of the files in a directory with a given extension? Ex: all files in c:\temp with extension .xyz Marcus Spitzmiller "Ha ha, Stupid bloropope.." - Homer Re: List files in a directory Ravi Bhavnani3-Jan-02 16:24 Ravi Bhavnani 3-Jan-02 16:24  CFileFind. /ravi "There is always one more bug..." http://www.ravib.com ravib@ravib.com Re: List files in a directory Marcus Spitzmiller3-Jan-02 16:26 Marcus Spitzmiller 3-Jan-02 16:26  Thanks, too! You just beat my post. Marcus Spitzmiller "Ha ha, Stupid bloropope.." - Homer Re: List files in a directory Nish Nishant3-Jan-02 16:33 Nish Nishant 3-Jan-02 16:33  CPians are really fast at answering questions Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: List files in a directory Marcus Spitzmiller3-Jan-02 16:25 Marcus Spitzmiller 3-Jan-02 16:25  Looks like I should've looked around a bit longer: CFileFind Marcus Spitzmiller "Ha ha, Stupid bloropope.." - Homer VC++ 7.0? MasterBlaster3-Jan-02 16:15 MasterBlaster 3-Jan-02 16:15  Hi all, I would like to know if VC++ 7.0, that's what I heard is the next version, if it is a seperate commercial release or if it is part of MS .NET studio? Thanks, Don Cathcart Re: VC++ 7.0? Nish Nishant3-Jan-02 16:19 Nish Nishant 3-Jan-02 16:19  VC++ 7.0 is part of Visual Studio .NET Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: VC++ 7.0? MasterBlaster3-Jan-02 16:24 MasterBlaster 3-Jan-02 16:24  Thanks, that was fast? Is there a Standard, Pro and Enterprise versions of Visual Studio .NET? Re: VC++ 7.0? Nish Nishant3-Jan-02 16:30 Nish Nishant 3-Jan-02 16:30  I guess there would be at least two editions, perhaps even more. Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: VC++ 7.0? - nick query Nish Nishant3-Jan-02 16:32 Nish Nishant 3-Jan-02 16:32  MasterBlaster? Here that's what we call Sachin Tendulkar . Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: VC++ 7.0? - nick query Michael P Butler4-Jan-02 1:14 Michael P Butler 4-Jan-02 1:14  Nish [BusterBoy] wrote: MasterBlaster? Here that's what we call Sachin Tendulkar . Really, in England we call him "oh no, not him again. Let's just put 150 runs on the board. It saves time and effort" Michael STL optimization Not Active3-Jan-02 15:03 Not Active 3-Jan-02 15:03  I thought STL was a bit more optimized than this. While I would expect and simple array to be faster I was surprised at the amount of difference. Using the two functions below I got the following timing results. FooList: 0.0013247494 seconds FooArray: 0.0000005587 seconds std::list<DWORD> FooList() { std::list<DWORD> list; for(int x = 0; x < 50; x++) list.push_back(x); return list; } void FooArray(DWORD* list) { for(int x = 0; x < 50; x++) list[x] = x; }

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