Hi guys, I'm trying to do something like the following: enum E; void Foo(E e); enum E {A, B, C}; which the compiler rejects. I've had a quick look on Google and the consensus seems to be "you can't do it", but I can't understand why. Can anyone explain? Many thanks. Clarification 2: I'm doing this as I have private methods in a...
I have created a namespace extension that is rooted under Desktop. The main purpose of the extension is to provide a virtual list of ZIP files that represent a list of configurable directories. When the user clicks one of the those items the contents of the related directory are zipped in place and the resulting ZIP file is stored in a c...
I start using the visual studio c++ express 2008 at home but there is no ATL in it. How can I add ATL to visual studio c++ express 2008? ...
I need a function called SizeOfPipe() which should return the size of a pipe- I only want to know how much data is in the pipe and not actually read data off the pipe itself. I thought the following code would work fseek (pPipe, 0 , SEEK_END); *pBytes = ftell (pPipe); rewind (pPipe); but fseek dosent work on file descriptors. Anothe...
Hello, I have my own class inside the file "Particles.h" and the class's implementation is inside "Particles.cpp" and I want the file "Load.h" to recognize my classes inside there,so I've added the line #include "Particles.h" and the file doesn't recognizes it,and at the past everything was ok(I havn't made any changes inside that clas...
I just came across the proposed Boost::Dataflow library. It seems like an interesting approach and I was wondering if there are other such alternative frameworks for C++, and if there are any related design patterns. I have not ruled out Boost::Dataflow, I am just looking into any available alternatives so I can understand the domain an...
I have a BSTR object that I would like to convert to copy to a wchar__t object. The tricky thing is the length of the BSTR object could be anywhere from a few kilobytes to a few hundred kilobytes. Is there an efficient way of copying the data across? I know I could just declare a wchar_t array and alway allocate the maximum possible data...
Given the following example, why do I have to explicitly use the statement b->A::DoSomething() rather than just b->DoSomething()? Shouldn't the compiler's overload resolution figure out which method I'm talking about? I'm using Microsoft VS 2005. (Note: using virtual doesn't help in this case.) class A { public: int DoSomething(...
Using C++ (and Qt), I need to process a big amount of 3D coordinates. Specifically, when I receive a 3D coordinate (made of 3 doubles), I need to check in a list if this coordinate has already been processed. If not, then I process it and add it to the list (or container). The amount of coordinates can become very big, so I need to sto...
What's the reason for the "No newline at end of file" warning in some C++ compilers? What's good about having an empty line at the end of a source\header file? ...
I'd like to know of an example of a problem which was solved by adding the volatile keyword. I'm sure it has helped somebody solve something, but I don't know where I would actually apply it. In my case, it has never been the answer. ...
I've got a C++ program that uses SQLite. I want to store the SQL queries in a separate file -- a plain-text file, not a source code file -- but embed that file in the executable file like a resource. (This has to run on Linux, so I can't store it as an actual resource as far as I know, though that would be perfect if it were for Windows...
Problem (simplified to make things clearer): 1. there is one statically-linked static.lib that has a function that increments: extern int CallCount = 0; int TheFunction() { void *p = printf("Function called"); return CallCount++; } 2. static.lib is linked into a managed C++/CLI managed.dll t...
I'd like to use a different icon for the demo version of my game, and I'm building the demo with a different build config than I do for the full verison, using a preprocessor define to lockout some content, use different graphics, etc. Is there a way that I can make Visual Studio use a different icon for the app Icon in the demo config ...
C++ just sucks too much of my time by making me micro-manage my own memory, making me type far too much (hello std::vector<Thingy>::const_iterator it = lotsOfThingys.begin()), and boring me with long compile times. What's the single best alternative for serious real-time graphics programming? Garbage collection is a must (as is the abi...
I wanted to "emulate" a popular flash game, Chrontron, in C++ and needed some help getting started. (NOTE: Not for release, just practicing for myself) Basics: Player has a time machine. On each iteration of using the time machine, a parallel state is created, co-existing with a previous state. One of the states must complete all the o...
I have been working on some legacy C++ code that uses variable length structures (TAPI), where the structure size will depend on variable length strings. The structures are allocated by casting array new thus: STRUCT* pStruct = (STRUCT*)new BYTE [sizeof(STRUCT) + nPaddingSize]; Later on however the memory is freed using a delete call:...
I created a C++ console app and just want to capture the cout/cerr statements in the Output Window within the Visual Studio 2005 IDE. I'm sure this is just a setting that I'm missing. Can anyone point me in the right direction? ...
I have a C++ application that uses SQL Native Client to connect to a MS SQL Server 2000. I am trying to retrieve a result from a TEXT column containing more data than the buffer initially allocated to it provides. To clarify my issue, I'll outline what I'm doing (code below): allocate buffer of 1024 bytes use bind buffer to column us...
Linux/Gcc/LD - Toolchain. I would like to remove STL/Boost debug symbols from libraries and executable, for two reasons: Linking gets very slow for big programs Debugging jumps into stl/boost code, which is annoying For 1. incremental linking would be a big improvement, but AFAIK ld does not support incremental linking. There is a w...