In C++ you can easily allocate one dimensional array like this: T *array=new T[N]; And you can delete it with one statement too: delete[] array; The compiler will know the magic how to deallocate the correct number of bytes. But why can't you alloc 2-dimensional arrays like this? T *array=new T[N,M]; Or even like this? T *arra...
I want to embed(make OneNote a control) in my application. I know Excel is possible using a control in .Net but I don't know how to make OneNote embedded. The languages I can use are C++ or C#. ...
I have come unstuck on a relatively (almost) trivial problem. I have a row of data that I want to display in tabular form (HTML). For some reason (possibly long day [again] behind the computer), I am not coming up with any elegant solutions (algorithms) to do this. I have presented some sample data, and how such data would be displayed ...
Hi I have path to a folder for example /myfolder or in Windows: C:\myfolder and I want to get a list of all files in that folder. How shall I do so in C? Is it different in C++ or C99? How can I get a list of its folders? Any help is appreciated. ...
i have following program to calculate size of file #include <iostream> #include <fstream> #include <string> using namespace std; int main(){ string line; ifstream myfile ("C:\\Users\\7\\Desktop\\example\\text.txt",ios::in | ios::out |ios::binary); if (!myfile){ cout<<"cannot open file"; exit (1); } ...
Hi, I'm looking for a simple example for camera access in Linux using V4L2. Where I can find it? As simple, as possible. Thanks, ...
How is STL vector usually implemented? It has a raw storage of char[] which it occasionally resizes by a certain factor and then calls placement new when an element is pushed_back (a very interesting grammatical form I should note - linguists should study such verb forms as pushed_back :) And then there are the alignment requirements. S...
CompVision once again, im working with jpeg images in my application. Just because i'm a bit familiar with MFC and ATL, i used CImage to access pixel values. For my needs i calculate brightness matrix for the image during initialization. Function goes like this(Image is the name of my own class, unimportant, bright is float[][]): voi...
I'm trying to get the following code to work, but I can't find good-enough documentation on how C++ handles public vs. private inheritance to allow me to do what I want. If someone could explain why I can't access Parent::setSize(int) or Parent::size using private inheritance or Parent::size using public inheritance. To solve this, to ...
I have the following code (I'm sorry for the lengthiness): double primeValue( const func1D &func, const double lowerBound, const double upperBound, const double pole ) { // check bounds if( lowerBound >= upperBound ) throw runtime_error( "lowerBound must be smaller than upperBound!" ...
I have the following declaration in a file that gets generated by a perl script ( during compilation ): struct _gamedata { short res_count; struct { void * resptr; short id; short type; } res_table[3]; } _gamecoderes = { 3, { { &char_resource_ID_RES_welcome_object_ID,1002, 1001 }, { &blah_resource_ID_RES_another_object...
I have written a simple single threaded client server application in Visual C++. When I run my server I wait for some time that it accepts some request from the client. When I connect the client to the server. The log message on the client reports 14 bytes are send and there is no message on the server. I have written a print statement ...
I have following code to accomplish prefix sum task: #include <iostream> #include<math.h> using namespace std; int Log(int n){ int count=1; while (n!=0){ n>>=1; count++; } return count; } int main(){ int x[16]={39,21,20,50,13,18,2,33,49,39,47,15,30,47,24,1}; int n=size...
Hello, I can't understand one problem: Types.hpp: enum SomeEnum { one, two, three }; First.hpp: #include "Types.hpp" class First { public: void someFunc(SomeEnum type) { /* ... */ } }; Second.hpp: #include "Types.hpp" #include "First.hpp" class Second { public: void Foo() { First obj; obj.someFunc(two); // tw...
In an embedded (Windows CE) C++ project, I have to resample an arbitrary sample-rate down (or up) to 44100 Hz. Is there a free and portable C/C++ library for audio resampling? ...
I've only been working with Boost.Spirit (from Boost 1.44) for three days, trying to parse raw e-mail messages by way of the exact grammar in RFC2822. I thought I was starting to understand it and get somewhere, but then I ran into a problem: #include <iostream> #include <boost/spirit/include/qi.hpp> namespace qi = boost::spirit::qi; u...
What are the key steps and tools it takes to creating a 3d video game. For example, I understand that a 3d artist will create 3d models in 3d Studio Max, or Maya, but where do these models go from there? Are the 3d models first animated by a 3d animator in 3d Studio Max/Maya? Then do these models along with the animation loops get sen...
Hi! I'd like to know which one is more suitable for programming contests, online judges. I don't want answers like "go with java" or "c++ is the fastest". I'd like to know that in more details, lets say like "95% of the time you wont need to write in c++, java solution will get accepted too" or "java has BigInteger object and c++ doesn...
I've seen two recent answers using _1 as a pure C++0x solution (no explicit mention of boost lambdas). Is there such an animal as std::_1 I would think that having native lambdas will make such a construct redundant. A Google code search for std::_1 brings two results from the same project so that's inconclusive. ...
that's the code: static inline void shrinkData(const vector<Data> &data, unsigned short shrinkType){ #define CASE_N(N) \ case(N): \ ptr = MemoryManager::requestMemory(n*sizeof(ShrinkData<N>)); \ for(int i=0; i<n; i++){ \ new(ptr) ShrinkData<N>(data[i]); \ ptr+=sizeof(ShrinkData<N>); \ ...