Hi all, the code below gives compilation error when I try to create test t[2]; because there is no default constructor for this. But if I create Test t[2] = {test(1,2), test(2,3)}; Then it works fine. 1)But think of a situation, if we want to create more then 100 array element. We need to create 100 element in the curly braces like.....
The following code shows unexpected behaviour on my machine (I'm using Visual C++ 2008 SP1 on Windows XP here): int main() { SetConsoleOutputCP( CP_UTF8 ); std::cout << "\xc3\xbc"; int fail = std::cout.fail() ? '1': '0'; fputc( fail, stdout ); fputs( "\xc3\xbc", stdout ); } I simply compiled with cl /EHsc...
In windows (or any other OS for that matter) what determines how much stack I can use? The name of this very website makes me assume it's possible to run out of stack so should I avoid putting large amounts of data on the stack? ...
Hello, I want to create some sample programs that deal with encodings, specifically I want to use wide strings like: wstring a=L"grüßen"; wstring b=L"שלום עולם!"; wstring c=L"中文"; Because these are example programs. This is absolutely trivial with gcc that treats source code as UTF-8 encoded text. But,straightforward compilation do...
I'm seeing an issue where a call to boost's thread->join in a destructor leads to a deadlock. I don't understand why, and I'm not too keen on keeping code that just works (and I don't understand why it does) in the project. Class declaration (I've stripped the run() method of try/catch for brevity: according to the boost thread documen...
I'm getting an error msg DataReader.h:13: error: 'String' was not declared in this scope DataReader.cpp:5: error: redefinition of 'std::vector<Data*, std::allocator<Data*> > DataReader' DataReader.h:13: error: 'std::vector<Data*, std::allocator<Data*> > DataReader' previously declared here DataReader.cpp:5: error: 'String' was not decla...
I know that for an integer, you can use: int value; I tried: string str; but Visual C++ gave me an error. How do I declare it without assigning a value, then using cin >> str later on to assign it? ...
I'm in the process of moving from XP to Linux. (I'm new to Linux) I have succesfully installed CLIPs on Ubuntu, using the SPM. I would however, like to build CLIPS from the sources - since I will be extending its current functionality. I have downloaded the CLIPS sources (v6.2.4) from http://sourceforge.net/projects/clipsrules/files/C...
Hi there Do you know any university which has his C++ course available online? I'm looking for something similar with MIT style(lecture notes, projects and examples, assignments, exams, solutions and video content ) this is what I've found on MIT, but id doesn't have video content. ...
Given that: 1) The C++03 standard does not address the existence of threads in any way 2) The C++03 standard leaves it up to implementations to decide whether std::string should use Copy-on-Write semantics in its copy-constructor 3) Copy-on-Write semantics often lead to unpredictable behavior in a multi-threaded program I come to the...
I am working on a client-server application. The client continuously reads data from server, so when a server is closed or disconnects then the client crashes. I tried a try/catch block, but it didn't work. My client application is written in C++. I want the client to display some proper message like "Server disconnected," then exit. ...
I have a 32-bit ATL C++ in-proc COM server soultion. How do I port it to 64-bit Windows? I mean how do I make VC++7 emit 64-bit code? Is it possible with Visual Studio 2003? ...
If you use nested namespaces, declarations in header files can get very long and unreadable. //header1 namespace test { namespace test1 { class Test {}; } } //namespace In header2 of the program: #include "header1" namespace test2 { class Test1 { void test(test::test1::Test &test) {} void test1(test::test1::Test &test) {} voi...
Is the following implementation, using lazy initialization, of Singleton (Meyers Singleton) thread safe? static Singleton& instance() { static Singleton s; return s; } If not, why and how to make it thread safe? ...
Hi, I would like to profit from Eclipse's code completion for boost:shared_pointer in Eclipse 3.5 with CDT 6.0. Eclipse doesn't offer any completion while I'm writing the following code: #include <boost/shared_ptr.hpp> #include "A.h" typedef boost::shared_ptr<A> aPTR; int main() { aPTR test(new A); test->ge.... // no comp...
I'm sure there's some way to do this with the \defgroup, \addgroup and \@{ \@} tags, but after a couple of hours of trial and (obviously) error, I'm asking SO..... I have: class C { public: void foo () const; }; and I have some helper non-member functions that really are part of C's interface, but aren't in the class: std::strin...
I have a simple tank wars style game using the allegro open source library. In my tank class, I initialize arrays of pointers to bitmap objects to 0. Then I create new objects with an allegro function create_bitmap which allocates the memory and initializes it. Then I go about my business as usual. The problem is, when I go to releas...
It seems to me that using unanchored namespaces is just asking for trouble later when someone puts in a new namespace that happens to have the same name as a root level namespace and mysteriously alters the meaning of a whole lot of programs. So, why do people always say std:: instead of ::std::. Do they really mean to be saying "I wan...
I've found lots of libraries to help with parsing command-line arguments, but none of them seem to deal with handling filenames. If I receive something like "../foo" on the command line, how do I figure out the full path to the file? ...
What's the difference between std::string and std::basic_string? And why are both needed? ...