is there an equivalent of std::swap() in c
i know how to swap 2 variables in c++ . ie you use std::swap(a,b). question: does the c standard library have a similar function to c++ std::swap() or do i have to define it myself ...
c++
Zero out array sent as parameter in C++
How do you make all elements = 0 in the array sent as a parameter? int myArrayFunction(int p_myArray[]) { p_myArray[] = {0};//compiler error syntax error: ']' . . } ...
How slow are bit fields in C++
I have a C++ application that includes a number of structures with manually controlled bit fields, something like #define FLAG1 0x0001 #define FLAG2 0x0002 #define FLAG3 0x0004 class MyClass { ' ' unsigned Flags; int IsFlag1Set() { return Flags & FLAG1; } void SetFlag1Set() { Flags |= FLAG1; } void ResetFla...
Trouble compiling C/C++ project in NetBeans 6.8 with MinGW on Windows
I am learning C and because VC++ 2008 doesn't support C99 features I have just installed NetBeans and configure it to work with MinGW. I can compile single file project ( main.c) and use debugger but when I add new file to project I get error "undefined reference to ... function(code) in that file..". Obviously MinGW does't link my fil...
High memory usage for dummies
I've just restarted my firefox web browser again because it started stuttering and slowing down. This happens every other day due to (my understanding) of excessive memory usage. I've noticed it takes 40M when it starts and then, by the time I notice slow down, it goes to 1G and my machine has nothing more to offer unless I close other ...
Could someone explain this interesting behaviour with Sleep(1)?
I was testing how long a various win32 API calls will wait for when asked to wait for 1ms. I tried: ::Sleep(1) ::WaitForSingleObject(handle, 1) ::GetQueuedCompletionStatus(handle, &bytes, &key, &overlapped, 1) I was detecting the elapsed time using QueryPerformanceCounter and QueryPerformanceFrequency. The elapsed time was about 15...
Detect a USB drive being inserted - Windows Service
I am trying to detect a USB disk drive being inserted within a Windows Service, I have done this as a normal Windows application. The problem is the following code doesn't work for volumes. Registering the device notification: DEV_BROADCAST_DEVICEINTERFACE notificationFilter; HDEVNOTIFY hDeviceNotify = NULL; ::Zero...
Porting Python algorithm to C++ - different solution
Thank you all for helping. Below this post I put the corrected version's of both scripts which now produce the equal output. Hello, I have written a little brute string generation script in python to generate all possible combinations of an alphabet within a given length. It works quite nice, but for the reason I wan't it to be fast...
Just introducing myself to TMPing, and came across a quirk
I was just trying to learn the syntax of the beginner things, and how it worked when I was making this short bit of code in VS2008. The code below works in adding numbers 1 to 499, but if I add 1 to 500, the compiler bugs out giving me: fatal error C1001: An internal error has occurred in the compiler. And I was just wondering why that...
C++: Converting Julian dates to Gregorian
I need to write a function that converts a Julian dates (Year, Day of Year, Hour of Day and Minutes) into a standard form (Year, Month, Day of Month, Hour of Day and Minutes) and express it as a string. I figure there's got to be someone who's already written a library or component which can do the conversion from Day Of Year to Month a...
iPhone c++ development / compiler on a non-Mac PC? (Windows? Linux?)
According to the (in)famous iPhone Developer Program License Agreement change 3.3.1 — Applications may only use Documented APIs in the manner prescribed by Apple and must not use or call any private APIs. Applications must be originally written in Objective-C, C, C++, or JavaScript as executed by the iPhone OS WebKit engine...
Is it possible to simultaneously debug VB6 and a C++ COM dll?
I have a VB6 dll that is loaded by a VB6 frontend. This VB6 dll calls a C++ ATL dll via its COM interface. So, I can run from code in VB6 and I can debug in C++ also, however I can't seem to step through the VB6 code and then get into the C++ code. I feel that this should be possible. Currently I am doing the following steps Start VB6 ...
C/C++ in Android?
Is it possible to use C/C++ code in Android? And how easy is it? ...
Redirect C++ std::clog to syslog on Unix
I work on Unix on a C++ program that send messages to syslog. The current code uses the syslog system call that works like printf. Now I would prefer to use a stream for that purpose instead, typically the built-in std::clog. But clog merely redirect output to stderr, not to syslog and that is useless for me as I also use stderr and st...
Is there any free OCaml to C translator?
So I have nice OCaml code (50000 lines). I want to port it to C. So Is there any free OCaml to C translator? ...
UITextView w/ Syntax Highlighting
Is there a common library, parser, etc. for Cocoa or Cocoa-Touch that can take a chunk of text and do the proper syntax highlighting? As a simple example, I'd like to have a UITextView that has C/C++ syntax highlighting. ...
C++: conjunction of binds?
Suppose the following two functions: #include <iostream> #include <cstdlib> // atoi #include <cstring> // strcmp #include <boost/bind.hpp> bool match1(const char* a, const char* b) { return (strcmp(a, b) == 0); } bool match2(int a, const char* b) { return (atoi(b) == a); } Each of these functions takes two arguments, but can...
Should I use C++0x Features Now?
With the official release of VS 2010, is it safe for me to start using the partially-implemented C++0x feature set in my new code? The features that are of interest to me right now are both implemented by VC++ 2010 and recent versions of GCC. These are the only two that I have to support. In terms of the "safety" mentioned in the first...
[C++] Trouble declaring and recognizing global functions
I've created some mathematical functions that will be used in main() and by member functions in multiple host classes. I was thinking it would be easiest to make these math functions global in scope, but I'm not sure how to do this. I've currently put all the functions in a file called Rdraws.cpp, with the prototypes in Rdraws.h. Even w...
C++ open() fails for no apparant reason
The following code: char filename[64]; ifstream input; cout << "Please enter the filename: " << endl; cin >> filename; input.open(filename); if (!input.is_open()) { cout << "Opening file " << filename << " failed." << endl; exit(1); } fails, it enters the if() and exits. What could possibly be the cause for this? I'm using ...