A 16-digit hashing function
Is there a hash function that returns a 16-digit hex value (as MD5 returns 32-digit), or is there a library (for C++) in which I can use MD5 or SHA-1 which returns a 16-digit value ...
c++
Need help modifying C++ application to accept continuous piped input in Linux
The goal is to mine packet headers for URLs visited using tcpdump. So far, I can save a packet header to a file using: tcpdump "dst port 80 and tcp[13] & 0x08 = 8" -A -s 300 | tee -a ./Desktop/packets.txt And I've written a program to parse through the header and extract the URL when given the following command: cat ~/Desktop/packet...
Why do programmers sometimes refer to "C++/STL" like it's a separate language?
This may seem a trivial question, but it's one that's bothered me a lot lately. Why do some programmers refer to "C++/STL" like it's a different language? The STL is part of the C++ standard library -- and therefore is part of the language, "C++". It's not a separate component, and it does not live alone in the scope of things C++. Yet s...
Colour instead of color?
I'm working on a game engine in C++ and I have methods like setColour and things that use british grammar. While I was thinking how C++ compilers mostly use the english language (correct me if I'm wrong) and how most APIs use american grammar, should I go with the flow and continue the unofficial standard in the grammar programmer high c...
volatile vs. mutable in C++
Hi I have a question about the difference between volatile and mutable. I noticed that both of the two means that it could be changed. What else? Are they the same thing? What's the difference? Where are they applicable? Why the two ideas are proposed? How to use them in different way? Thanks a lot. ...
What is the purpose of a volatile member function in C++?
What is the purpose of a volatile member function in C++? ...
What threading analysis tools do you recommend?
My primary IDE is Visual Studio 2005 and I have a large C/C++ project. I'm interested in what thread analysis tools are recommended. By that I mean, I want a tool, static or dynamic, to help find race conditions, deadlocks, and the like. So far I've casually researched the following: 1. Intel Thread Checker: I don't believe that it...
Why other languages don't have automatic garbage collection similar as that of the Java Garbage Collector?
What are the reason/s behind other languages not having a Garbage Collector? EDIT: Why garbage collection is not built-in for these other languages? why do programmers given the responsibility to collect? EDIT: All of the questions if possible please :) ...
why nResult ！= nConvertedLen，when use CComBSTR；
CComBSTR wsData = (char*)pvData； when constuct CComBSTR，call A2WBSTR，but sometimes nResult ！= nConvertedLen，just 1/20. why？ inline BSTR A2WBSTR(_In_opt_ LPCSTR lp, int nLen = -1) { if (lp == NULL || nLen == 0) return NULL; USES_CONVERSION_EX; BSTR str = NULL; #pragma warning(push) #pragma warning(disable: 6385) ...
One question with array declaration in C++
Hi What's the difference between the two code below. int a[] = {0,0}; int a[2] = {0,0}; It seems I can assign value to a[3] in both cases. I can access a[3] in any case. So what's the difference? ...
What open source C/C++ audio compression options are there besides LAME MP3?
Are there any C/C++ open source audio encoder besides LAME MP3? It doesn't need to be exactly mp3 format, I need a "compressed digital audio file". I do not want to use Lame because it is too big while no programmer can answer a simple question on it (share simple but easily downloadable and readable project containing only needed 2 sim...
How different is Objective-C from C++?
What are the main differences between Objective-C and C++ in terms of the syntax, features, paradigms, frameworks and libraries? *Important: My goal is not to start a performance war between the two languages. I only want real hard facts. In fact, my question is not related to performance! Please give sources for anything that may seem ...
How does void QTableWidget::setItemPrototype ( const QTableWidgetItem * item ) clones objects?
QTableWidget::setItemPrototype says following. "The table widget will use the item prototype clone function when it needs to create a new table item. For example when the user is editing in an empty cell. This is useful when you have a QTableWidgetItem subclass and want to make sure that QTableWidget creates instances of your subclass."...
Importance of a singlecolon ":" in C++
Rarely in the regular codes I encounter the a single colon in classes for e.g.: A::member():b(),c() { } What is the importance of the single colon over here? Why is it used here? Is it mandatory sometimes? If so in which cases? ...
PHP extension wrapper for C++
Hi guys, I am new in this area of writing extension for PHP, however I need to create a wrapper class for C++ to PHP. I am currently using PHP 5.2.13. I read this article http://devzone.zend.com/article/4486-Wrapping-C-Classes-in-a-PHP-Extension, a tutorial on how I could proceed to wrap C++ class to communicate with PHP Zend however it ...
Why cant we initialize Const and reference varibales inside the constructor braces({ }) and is always done via initialization list
Why cant we initialize Const and reference varibales inside the constructor braces({ }) and is always done via initialization list Thanks, Sandeep ...
Ruby on Rails, PHP or C++ for web social network
Hello, I have chosen diploma work in university. It's a mini social network. But now I am really stuck with which technology I should stick. I am average at C++ ISAPI web services development, below average PHP(had few projects with it) and new to Ruby and its framework RAILS. I have a deadline 1.5 month to develop it(about 5 hours ever...
Returning recursive ternary freaks out
Hi, assume this following function: int binaryTree::findHeight(node *n) { if (n == NULL) { return 0; } else { return 1 + max(findHeight(n->left), findHeight(n->right)); } } Pretty standard recursive treeHeight function for a given binary search tree binaryTree. Now, I was helping a friend (he's taking an al...
Can I switch the Visual C++ runtime to another heap?
My program uses a third party dynamic link library that has huge memory leaks inside. Both my program and the library are Visual C++ native code. Both link to the Visual C++ runtime dynamically. I'd like to force the library into another heap so that all allocations that are done through the Visual C++ runtime while the library code is ...
C++ for Ruby scripters
I am a fairly capable Ruby scripter/programmer, but have been feeling pressure to branch out into C++. I haven't been able to find any sites along the lines of "C++ for Ruby Programmers". This site exists for Python (which is quite similar, I know). Does anyone know of a guide that can help me translate my Ruby 'thoughts' into C++? ...