I have a function of a "Table" class that should add a player to the table. I decided that if the seat is taken, the function should try and go through all the seats and add the player to the next available seat. How do I implement this in my addPlayer function? int Table::addPlayer(Player player, int position) { deque<Player>::iterat...
I have ComboBox (DropDown one) with 2 items in it ("One", "Onion"). When I type 'on' in combo and push dropdown arrow then the text i wrote automatically changes (item "One" is highlighted in list and text changes to "One"). How to prevent it? ...
I have this bit of code: typedef CComQIPtr<MSXML::IXMLDOMDocument2> XML_DocumentPtr; then inside some class: XML_DocumentPtr m_spDoc; then inside some function: XML_NodePtr rn=m_spDoc->GetdocumentElement(); I cannot find anywhere in the MSDN documentation what that GetDocumentElement() is supposed to do? Can anyone tell me why ...
Hi Is there are a better way than this one to print 2d table? std::cout << std::setw(25) << left << "FF.name" << std::setw(25) << left << "BB.name" << std::setw(12) << left << "sw.cycles" << std::setw(12) << left << "hw.cycles" << "\n" << std::setw(25) << left << "------" << std::setw(25) << lef...
Hi there, I'm back to C/C++ after some break. I've a following problem: I've a solution where I've several projects (compilable and linkable). Now I need to add another project to this solution which depends on some sources from other projects. My new project compiles without any problems (I've added "existing sources" to my project)....
Is it possible to block the removal of certain slots from a signal in the boost.signals library? If so how should a code that does such a thing will look like? Do I need to create a derived class just for that specific signal to do so? ...
I have an application built with the MinGW C++ compiler that works something like grep - acommand looks something like this: myapp -e '.*' *.txt where the thing that comes after the -e switch is a regex, and the thing after that is file name pattern. It seems that MinGW automatically expands (globs in UNIX terms) the command line so ...
In brief, my question is about member variables as pointers in unmanaged C++. In java or c#, we have "advanced pointer". In fact, we can't aware the "pointer" in them. We usually initialize the member of a class like this: member = new Member(); or member = null; But in c++, it becomes more confusing. I have seen many styles: usin...
While compiling on GCC I get the error: pure-specifier on function-definition, but not when I compile the same code using VS2005. class Dummy { //error: pure-specifier on function-definition, VS2005 compiles virtual void Process() = 0 {}; }; But when the definition of this pure virtual function is not inline, it works: class ...
Lets say I have a vector of int which I've prefilled with 100 elements with a value of 0. Then I create 2 threads and tell the first thread to fill elements 0 to 49 with numbers, then tell thread 2 to fill elements 50 to 99 with numbers. Can this be done? Otherwise, what's the best way of achieving this? Thanks ...
hi I have to write a windows api code that encrypts a file by adding three to each character. so I wrote this now its not doing anything ... where i go wronge #include "stdafx.h" #include <windows.h> int _tmain(int argc, _TCHAR* argv[]) { HANDLE filein,fileout; filein=CreateFile (L"d:\\test.txt",GENERIC_READ,0,NUL...
Hi, I'm a beginning user in C++ and I want to know how to do this: How can I 'create' a byte from a string/int. So for example I've: string some_byte = "202"; When I would save that byte to a file, I want that the file is 1 byte instead of 3 bytes. How is that possible? Thanks in advance, Tim ...
I am attempting to create a mysql UDF which will match a fingerprint using Digital Persona's free linux SDK library. I have written a trivial UDF as a learning experience which worked fine. However, when I added a dependency to Digital Persona's shared object I can no longer get MySql to load my UDF. I added includes to DP's headers a...
Hi, I need to generate a digital signature from C++ code, using OpenSSL libraries. I understood that I need for that DSA \ DSA_do_sign, but didn't understand how exactly to use it. Does someone have an example for that, or a reference for better than OpenSSL's supplied docs? Thanks in advance! ...
Possible Duplicate: casting char[][] to char** causes segfault? I have a 2D array declared like this: int arr[2][2]={ {1,2},{3,4}}; Now if I do: int ** ptr=(int**) arr; and: cout<<**ptr; I am getting a segmentation fault (using g++-4.0). Why so? Shouldn't it be printing the value 1 (equal to arr[0][0])? ...
Say I have a struct that looks like this (a POD): struct Foo { int i; double d; }; What are the differences between the following two lines: Foo* f1 = new Foo; Foo* f2 = new Foo(); ...
Hi, I'm using boost::function for making function-references: typedef boost::function<void (SomeClass &handle)> Ref; someFunc(Ref &pointer) {/*...*/} void Foo(SomeClass &handle) {/*...*/} What is the best way to pass Foo into the someFunc? I tried something like: someFunc(Ref(Foo)); ...
I'm trying to make a MFC application(client) that connects to a server on ("localhost",port 1234), the server replies to the client and the client reads from the server's response. The server is able to receive the data from the client and it sends the reply back to the socket from where it received it, but I am unable to read the reply...
I have XML files that are representation of a portion of HTML code. Those XML files also have widget declarations. Example XML file: <message id="msg"> <p> <Widget name="foo" type="SomeComplexWidget" attribute="value"> inner text here, sets another attribute or inserts another widget to the tree if needed... ...
Is there a macro that tells me whether or not my compiler supports variadic templates? #ifdef VARIADIC_TEMPLATES_AVAILABLE template<typename... Args> void coolstuff(Args&&... args); #else ??? #endif If they are not supported, I guess I would simulate them with a bunch of overloads. Any better ideas? Maybe there are preprocessor li...