I'm going to write a program that plots data from a sensor connected to the computer. The sensor value is going to be plotted as a function of the time (sensor value on the y-axis, time on the x-axis). I want to be able to add new values to the plot in real time. What would be best to do this with in C++? Edit: And by the way, the progr...
I have seen the post where somebody commented that cooliris can be built using C++ and openGL. I have just started learning openGL. I wanted to ask how to go about creating it? ...
Hi guys, My environment is XP 32-bit. I find when allocated memory is nearly the maximum size, 2GB, that means a little virtual space is available, allocationnew memory is very slow. So if I have a page file, my app need to analyze them. I have two ways. One is to read them all into system memory, then do the analysis. The other is to...
I have an MFC application which I am trying to package for deployment. It seems to depend on the files 'msvcr90.dll', 'msvcp90.dll' and 'mfc90.dll'. What is the correct way to distribute these files? I can't use merge modules as my installer doesn't support them. I know I can run VCRedist_x86.exe, but I don't want to do this for various...
is there a way to use the a.vim plugin to switch between .h, .cxx and .txx files? Alternatively, can you provide another solution? The idea is to automagically switch from .h -> .txx -> .cxx at the press of a key. A Big Thanks to both of you! ...
It might be a silly question but is there any difference between std::string s1("foo"); and std::string s2 = "foo"; ? ...
Is the following piece of code supposed to work? bool b1 = true; bool b2 = 1 < 2; if (b1 == b2) { // do something } I suspect that not all 'trues' are equal. ...
I recently had the following memory bug, which is easy to spot here, but can be harder to detect in more complex code: class Foo : public IFoo { const Bar& bar_; public: Foo(const Bar& bar) : bar_(bar) { } void test() { // access bar_ here } }; int baz() { IFoo* foo = NULL; if(whatever) { Bar bar; foo = new Fo...
Hi. What is the difference between remove and unlink functions in C++? Thanks. ...
Hi all, I would like to decrypt a file that I previously encrypted with C# using the TripleDESCryptoServiceProvider. Here's my code for encrypting: private static void EncryptData(MemoryStream streamToEncrypt) { // initialize the encryption algorithm TripleDES algorithm = new TripleDESCryptoServiceProvider(); ...
Can I check the page fault time or something else.. :) ...
__FILE__ and __LINE__ are well known. There is a __func__ since C99. #include <iostream> struct Foo { void Do(){ std::cout << __func__ << std::endl; } }; int main() { std::cout << __func__ << std::endl; Foo foo; foo.Do(); return 0; } will output main Do Is there any macro / keyword that would output...
We have a C++ unmanaged application that appears to cause a UAC prompt. It seems to happen on Win7 and NOT on Vista Unfortunately the UAC dlg is system modal so I can't attach a debugger to check in the code where it is, and running under msdev (we're using 2008) runs in elevated mode. We put a message box at the start of our progr...
I frequently work with libraries that use char when working with bytes in C++. The alternative is to define a "Byte" as unsigned char but that not the standard they decided to use. I frequently pass bytes from C# into the C++ dlls and cast them to char to work with the library. When casting ints to chars or chars to other simple types w...
I made this implementation for this problem : http://www.spoj.pl/problems/SHOP/ #include<iostream> #include<stdio.h> #include<queue> #include<conio.h> #include<string.h> using namespace std; struct node { int x; int y; int time; }; bool operator <(const node &s,const node &r) { if(s.time>r.time) return true; e...
Possible Duplicates: Hashtable in C++? can anybody offer a simple hash_map example in C++? Does the STL contain an implementation of a hashtable? If so, can you provide a brief example of how to use it? ...
There's simple example: #include <vector> int main() { vector<int> veci; vector<double> vecd; for(int i = 0;i<10;++i){ veci.push_back(i); vecd.push_back(i); } vecd = veci; // <- THE PROBLEM } The thing I need to know is how to overload operator = so that I could make assignment like this: vector<double> = vector<int>; I'...
I have an interesting problem. Let's say that i have file with lines filled like this: name1[xp,y,z321](a,b,c){text};//comment #comment name2(aaaa); also I have (simplified) class: class something { public: something(const std::string& name); addOptionalParam(const std::string& value); addMandatoryParam(const std::string& value); ...
I am creating a constructor that will take a pair of input iterators. I want the method signature to have compile-time const semantics similar to: DataObject::DataObject(const char *begin, const char *end) However, I can't find any examples of this. For example, my STL implementation's range constructor for vector is defined as: tem...
Can I assume a file generated with fwrite and read using fread is portable across different systems. 32bit/64bit windows,osx,linux. //dumping FILE *of =fopen("dumped.bin","w"); double *var=new double[10]; fwrite(var, sizeof(double), 10,FILE); //reading file *fo=fopen() double *var=new double[10]; fread(var,sizeof(double),10,of); And w...