Dynamic array of template objects in C++
#include <vector> using namespace std; int main() { vector<int> *list = new vector<int>[33]; delete[] list; return 0; } Any reason why the delete SIGSEGVs? ...
c++
The most efficient way of implementing pow() function in floating point
Hi, I am trying to implement my own version of pow() and sqrt() function as my custom library doesn't have pow()/sqrt() floating point support. Can anyone help? ...
Abstract classes in shared library
I have an ordinary abstract class that has a couple of pure virtual methods. The class itself is a part of the shared library. The compilation of the shared library itself is OK. But when the library is linked to another program that has another class deriving from the abstract one in the shared library and defining the pure virtual meth...
UnitTest++ constructing fixtures multiple times?
I'm writing some unit tests in UnitTest++ and want to write a bunch of tests which share some common resources. I thought that this should work via their TEST_FIXTURE setup, but it seems to be constructing a new fixture for every test. Sample code: #include <UnitTest++.h> struct SomeFixture { SomeFixture() { // this line is...
Issue using Visual Studio 2010 compiled C++ DLL in Windows 2000
I have a very simple DLL written in unmanaged C++ that I access from my application. I recently switch to Visual Studio 2010, and the DLL went from 55k down to 35k with no code changes, and now it will no longer load in Windows 2000. I didn't change any code or compiler settings. I have my defines setup for 0x0500, which should include W...
2d array, using calloc in C
Hi, I'm trying to create a 2D array of chars to storage lines of chars. For Example: lines[0]="Hello"; lines[1]="Your Back"; lines[2]="Bye"; Since lines has to be dynamically cause i don't know how many lines i need at first. Here is the code i have: int i; char **lines= (char**) calloc(size, sizeof(char*)); for ( i = 0; i < size; ...
Set all outgoing network traffic to go through a certain proxy.
I think I know how to do this in windows with registry entry. Any cleaner ways with .NET? Anyway to do this in Qt, so for Macs as well? ...
Gui's with Win32 API
I'm wondering what the correct way of creating Gui's in with Win32 API. Right now I just call the CreateWindowEx in my WM_CREATE event, but I don't think this is the right way to do it. Just as an example, what would be the correct way of adding a 100x20 EditField and getting text from it? Would you create it on WM_Create then use GetTex...
Macros in macros (C++)
Is it possible to put a macro in a macro in c++? Something like: #define Something\ #ifdef SomethingElse\ //do stuff \ #endif\ I tried and it didn't work so my guess is it doesn't work, unless there's some sort of syntax that can fix it? ...
Getting bizarre "expected primary-expression" error.
Hi, I'm getting a really strange error when making a method call: /* input.cpp */ #include <ncurses/ncurses.h> #include "input.h" #include "command.h" Input::Input () { raw (); noecho (); } Command Input::next () { char input = getch (); Command nextCommand; switch (input) { case 'h': nextComma...
How can I get bitfields to arrange my bits in the right order?
To begin with, the application in question is always going to be on the same processor, and the compiler is always gcc, so I'm not concerned about bitfields not being portable. gcc lays out bitfields such that the first listed field corresponds to least significant bit of a byte. So the following structure, with a=0, b=1, c=1, d=1, you ...
Construct a LPCWSTR on WinCE in C++ (Zune/ZDK)
What's a good way to construct an LPCWSTR on WinCE 6? I'd like to find something similar to String.Format() in C#. My attempt is: OSVERSIONINFO vi; memset (&vi, 0, sizeof vi); vi.dwOSVersionInfoSize = sizeof vi; GetVersionEx (&vi); char buffer[50]; int n = sprintf(buffer, "The OS version is: %d.%d", vi.dwMajorVersion, vi.dwMinorVe...
Make Map Key Sorted According To Insert Sequence
Without help from additional container (like vector), is it possible that I can make map's key sorted same sequence as insertion sequence? #include <map> #include <iostream> using namespace std; int main() { map<const char*, int> m; m["c"] = 2; m["b"] = 2; m["a"] = 2; m["d"] = 2; for (map<const char*, int>::iterator begi...
Is there a C++ cross platform "named event like the "CreateEvent()" in Win32?
I am looking for something analogous to CreateEvent(), SetEvent() and WaitForMultipleObjects() from the Win32 world. Specifically this has to be accessible across processes on the same machine. We are already using Poco for some cross platform stuff, but I don't see that the Poco::Event is what I want. perhaps i am missing something. ...
Undefined symbols for C++0x lambdas?
I was just poking around into some new stuff in C++0x, when I hit a stumbling block: #include <list> #include <cstdio> using namespace std; template <typename T,typename F> void ForEach (list<T> l, F f) { for (typename list<T>::iterator it=l.begin();it!=l.end();++it) f(*it); } int main() { int arr[] = {1,2,3,4,5,6}; ...
C++: Saving the class object in archived format which is having char * attributes and read it back from file.
Hi all, Assume I have a class class A { char *attr1,*attr2; public: . . . }; How to save the object of this class to file in a binary format and read it back? Thanks. ...
Linux C++: Linker is outputting strange errors
Alright, here is the output I get: arm-none-linux-gnueabi-ld --entry=main -dynamic-linker=/system/bin/linker -rpath-link=/home/oem/android-ndk-r3/build/platforms/android-5/arch-arm/usr/lib -L/home/oem/android-ndk-r3/build/platforms/android-5/arch-arm/usr/lib -nostdlib -lstdc++ -lm -lGLESv1_CM -rpath=/home/oem/android-ndk-r3/build/platfo...
Is there any good book for Boost library C++ and for Object Oriented Design in C++?
This post is about 2 questions in one: Good books for Boost C++ library OO Design in C++. I come from Java background and tend to think in terms of Interfaces, Singletons etc. How do I translate it to C++ or how to start thinking differently for C++ -Ajay ...
Why does the token returned by LogonUser() in Win x64 not belong to LOCAL group?
Hi, I have a piece of code that calls LogonUser() followed by CreateProcessAsUser(). In Win32, the resulting process belongs to a user (say, TESTDOMAIN\user1) who belongs to the LOCAL group. However, in x64, the process owner does not belong to LOCAL. The owner still belongs to all other groups (Authenticated Users, Everyone, etc.) Doe...
How can i determine the version of the Windows SDK installed on my computer?
Hello everyone :) I've very recently decided to teach myself c++ and win32 programming after learning vb.net, and i've got a very simple question: How can I determine what version of the Windows SDK is installed on my computer? I'm asking so I can install the latest version if it isn't installed allready, before i start playing around w...