Im a little confused. Im wondering if an array based Binary Search tree is implemented this way? void BST::insert(item &items, const data & aData ) {//helper function. Parent++; data *new_data = new data(aData); this->insert(*new_data); } // insert a new item into the BST void BST::insert(const data &aData ) { if ( item...
in C++ when i get an error that says xxxxx does not name a type in yyy.h What does that mean? yyy.h has included the header that xxxx is in. Example, I use: typedef CP_M_ReferenceCounted FxRC; and I have included CP_M_ReferenceCounted.h in yyy.h I am missing some basic understanding, what is it? ...
I need help with pointers and memory management. I need to store different objects, all derived from the same base class, and have been using an array to do this but it is causing a segmentation fault when the array is populated with different objects. My program works fine when the array is full of objects of the same derived type. ...
After many years of working on a general-purpose C++ library using the Microsoft MSVC compiler in Visual Studio, we are now porting it to Linux/Mac OS X (pray for us). I have become accustomed and quite fond of the simple memory leak detection mechanism in MSVC: #ifdef DEBUG #define _CRTDBG_MAP_ALLOC #define NEW new( _NORMAL_B...
I am trying to create a child process and then send SIGINT to the child without terminating the parent. I tried this: pid=fork(); if (!pid) { setpgrp(); cout<<"waiting...\n"; while(1); } else { cout<<"parent"; wait(NULL); } but when I hit C-c both process were terminated ...
Which DSP library in C/C++ would you recommend? I will need it for real-time embedded systems. It'd be great to have sound signal processing accompany too, but not a mandatory. If you have knowledge of any DSP library, please kindly share. Thank you! ...
Let say I am designing an interface, to return the name of the child class. Note that, for different instance of a child class, their name shall remain the same. For speed and memory efficient, I would say 3rd method signature is probably the best (based on some comment from http://stackoverflow.com/questions/801209/c-char-vs-stdstring...
I'm trying to implement a weighted random numbers. I'm currently just banging my head against the wall and cannot figure this out. In my project (Hold'em hand-ranges, subjective all-in equity analysis), I'm using Boost's random -functions. So, let's say I want to pick a random number between 1 and 3 (so either 1, 2 or 3). Boost's mersen...
Hi all! I have written an Excel COM Add-In in C++ for automation of Excel with VBA. It contains an own dialog showing some general informations about the Add-In. Now i create a button in Excel that opens the dialog. Leaving the dialog with the escape key leads to an Excel message that the script is being interrupted instead of just clos...
What I really want is, how do I know when each stage of C++ initialization is truly DONE? There is static initialization where simple things get assigned. Then there's dynamic static initialization where more complicated statics get assigned, which is not defined across 'translation units'. This is kind of horrible, and there are not ma...
Hi, This is similar to a recent question. I will be maintaining sorted a list of values. I will be inserting items of arbitrary value into the list. Each time I insert a value, I would like to determine its ordinal position in the list (is it 1st, 2nd, 1000th). What is the most efficient data structure and algorithm for accomplishing...
I'm trying to find out if two strings I have are the same, for the purpose of unit testing. The first is a predefined string, hard-coded into the program. The second is a read in from a text file with an ifstream using std::getline(), and then taken as a substring. Both values are stored as C++ strings. When I output both of the strings...
someone already asked this question, but the thread ended up with the original question not getting answered. suppose you have this: template<size_t i, class f_type> void call_with_i(f_type f); functor_type is either: a) a struct with a method that has the following signature: template<size_t i> operator()() const; or, b) a fun...
What are the typical reasons for bugs and abnormal program behavior that manifest themselves only in release compilation mode but which do not occur when in debug mode? ...
Here I have functor of the follow kind: template<class T, class Foo, T Foo::*p> struct X { void operator()(Foo & f) { (f.*p) = 12 * (f.*p); // simple example. could be more complex `operator()` } }; And sample struct: struct FF { int m; int r; }; I want to use the functor X, but I don't want to explicitly spec...
This should be a simple one: I have a CDialog with 2 buttons. The dialog is always opened in full screen (No title bar \ Status, etc...) using m_pMainWnd->ShowWindow(SW_MAXIMIZE); I want my buttons to snap to the edge of the screen. There are no resizing or anything. ...
Hi All, How can we check if a line segment falls partially or fully inside a triangle? Cheers. ...
I have three classes: Generic, CFG, and Evaluator. Here's Generic: class Generic: public virtual Evaluator, public CFG, public LCDInterface { Here's CFG: class CFG : public virtual Evaluator { And Evaluator subclasses nothing. I'm providing a DLL named PluginLCD, and it has a method called Connect: void PluginLCD::Connect(Evalua...
One could break the question into two: how to read and to write templated code. It is very easy to say, "it you want an array of doubles, write std::vector<double>", but it won't teach them how the templates work. ...
Sometimes (about 1 out of 100 runs), my program terminates with this message: terminate called after throwing an instance of 'Poco::SystemException' what(): System exception my code is not the one catching the exception (all my catches are more verbose), and I am not sure where it's caught. it's very likely that the exception does ...