Given this code: #include <iostream> #include <vector> #include <fstream> #include <sstream> #include <boost/regex.hpp> using namespace std; using namespace boost; int main ( int arg_count, char *arg_vec[] ) { if (arg_count !=2 ) { cerr << "expected one argument" << endl; return EXIT_FAILURE; } string ...
I've been looking for an example that shows how to implement constraints in C++ (or a boost library that lets me do this easily), but without much luck. The best I could come up with off the top of my head is: #include <boost/function.hpp> #include <boost/lambda/lambda.hpp> template<typename T> class constrained { public: cons...
I'm trying to work out if I can check if a particular video card device driver is loaded in Windows Server 2003 using C++. Can anyone give me pointers on how I might achieve this? Thanks ...
I have this data structure Seq which inherits the class vector but has some extra functionalities. Using this data structure Seq I have this predefined data structure: typedef Seq< vector<int> > MxInt2d; I want now to have a vector of several components of type MxInt2d; I was thinking about something like: MxInt2d* loops; it is jus...
Dear all, From the following code, I expect to get this output from the corresponding input: Input: FOO Output: Match Input: FOOBAR Output: Match Input: BAR Output: No Match Input: fOOBar Output: No Match But why it gives "No Match" for input FOOBAR? #include <iostream> #include <vector> #include <fstream> #include <sstrea...
Hi, I have some weird problem with templates. When trying to pass a parameterised iterator it complains that no function can be found. The code snippet is here, forget about the functionality, it's using the reference to the templatized iterator what interests me #include <list> #include <iostream> template<typename T> void print_list...
What is the meaning of const in declarations like these? The const confuses me. class foobar { public: operator int () const; const char* foo() const; }; ...
I've tried to research this on Google but there doesn't appear to me to be any coherent simple answers. Is this because it's not simple, or because I'm not using the correct keywords? Nevertheless, this is the progress I've made so far. Created 8 vertices to form 2 squares. Created a texture with a 200 bit alpha value (so, about 80% t...
In the code below I would like array to be defined as an array of size x when the Class constructor is called. How can I do that? class Class { public: int array[]; Class(int x) : ??? { } } ...
I have a C++ program on Linux that crashes after some time with the message: *** glibc detected *** free(): invalid pointer: 0x41e0ce94 *** Inside the program I make extensive use of containers. They have to store objects of a simple class. EDIT 2009-4-17: In the meantime it seems clear that the error has nothing to do with the simp...
Let's say that I have a binary that I am building, and I include a bunch of files that are never actually used, and do the subsequent linking to the libraries described by those include files? (again, these libraries are never used) What are the negative consequences of this, beyond increased compile time? ...
Please recommend a C++ compression (zip) library for a commercial, closed-source application. So, not a GPL license. This is for my day job... ...
Our application uses libcurl for HTTP, and we want to get access to Internet Explorer's proxy settings. An earlier Stack Overflow question recommends that we use WinHttpGetIEProxyConfigForCurrentUser and WinHttpGetProxyForUrl. Unfortunately, the winhttp.h header does not appear to be included with our copies either Visual C++ 2005 or Vi...
We have a core library in the form of a DLL that is used by more than one client application. It has gotten somewhat bloated and some applications need only a tiny fraction of the functionality that this DLL provides. So now we're looking at dividing this behemoth into smaller components. My question is this: Can anyone recommend a ...
In my C++ program, I need to pull a 64 bit float from an external byte sequence. Is there some way to ensure, at compile-time, that doubles are 64 bits? Is there some other type I should use to store the data instead? Edit: If you're reading this and actually looking for a way to ensure storage in the IEEE 754 format, have a look at Ada...
I've tried to Google this issue, and I can't find anything that I see as relevant. So I must be looking for the wrong thing; none the less, I'd appreciate some advice... Foobar &foobar = *new Foobar(someArg, anotherArg); Is it just me or does that seem smelly? I understand that the new keyword is designed for use with pointers (as su...
I have a server than is a "command handler" process. It receives messages over UDP, and delegates the work to do to a different process by communicating to that process through it's published API (whatever IPC mechanism that process employes). Our system has several cooperating processes. The result of that API call is then then sent ...
Hello, first time poster here. I'm writing a multi-threaded streaming audio application in C++ (MSVC) on Windows XP SP2. The problem I've encountered is that, upon minimizing / restoring any application on the task bar, all threads in my application are suspended while the window animation is active. This affects me because it causes t...
This is a little subjective I think; I'm not sure if the opinion will be unanimous (I've seen a lot of code snippets where references are returned). According to a comment toward this question I just asked, regarding initializing references, returning a reference can be evil because, [as I understand] it makes it easier to miss deleting...
Is it good to have all the setter functions return a reference to the object in c++? ...