Hello! I'm having prblems with my C++/openGL program. at some point of code, like these(it's a constructor): MyObject(MyMesh * m, MyTexture* t, float *c=NULL, float *sr=NULL, int sh=100){ texture=t; mesh=m; subObjects=NULL; texCoords=NULL; if (texture!=NULL){ texCoords=new float[mesh->numSurfacePoints*2]; the new throws an std::bad...
I'm trying to compile the basic tutorial program at http://doc.trolltech.com/4.4/mainwindows-application.html and running into a problem. Doing things the way the tutorial program does them, gives a compile error: In file included from debug\moc_mainwindow.cpp:10: debug\../mainwindow.h:2: error: expected class-name before '{' token deb...
One can get the text of the selected item in the list-view of a common dialog. But one can NOT get its PIDL, and if the user has chosen to hide known extensions (the default), then one cannot really tell what file was selected without either its extension or its PIDL. So possible ways to solve this might be: Obtain an IShellView fr...
The title says it all. It never happened to me. In Visual Studio, I have a part of code that is executed 300 times, I time it every iteration with the performance counter, and then average it. If I'm running the code in the debugger I get an average of 1.01 ms if I run it without the debugger I get 1.8 ms. I closed all other apps, I re...
Hey, probably the answer is quite silly but I need a pair fresh of eyes to spot the problem, if you will. this is the excerpt from _tmain: Agent theAgent(void); int m = theAgent.loadSAG(); and this is agent.h, which I included in _tmain: #ifndef AGENT_H #define AGENT_H class Agent { public: Agent(void); int loadSAG(void); ~Agent(voi...
Function signature: char * errMessage(int err); My code: [DllImport("api.dll")] internal static extern char[] errMessage(int err); ... char[] message = errMessage(err); This returns an error: Cannot marshal 'return value': Invalid managed/unmanaged type combination. What am I doing wrong? Thanks for any help. ...
I am trying to read a csv using get line to extract three variables separated by commas. Name, Course, and Grade. I am reading in the first line fine but it puts in weird new line breaks and sends the format into a cluster. Here is my code : #include "header.h" string student::GetCourse() { return course; } string student::GetNa...
I have a Visual Studio 6 workspace I'm trying to convert to a Visual Studio 2008 solution. The output of said solution is a .dll. It has to be a .dll and it needs to statically link MFC as I can't redistribute MFC to existing customers. The solution consists of three projects, say A, B, C. C is the Active Project, outputs the .dll and...
Hi everybody, Bumped into another templates problem: The problem: I want to partially specialize a container-class (foo) for the case that the objects are pointers, and i want to specialize only the delete-method. Should look like this: The lib code template <typename T> class foo { public: void addSome (T o) { printf ("adding...
I have a question about the following code sample (*m_value* isn't volatile, and every thread runs on a separate processor) void Foo() // executed by thread #1, BEFORE Bar() is executed { Interlocked.Exchange(ref m_value, 1); } bool Bar() // executed by thread #2, AFTER Foo() is executed { return m_value == 1; } Does using Inte...
Hi all, I'm new to boost shared arrays. There is existing code that declares two arrays: boost::shared_array<unsigned char> src; boost::shared_array<unsigned char> dest; All I want to do is swap what each array is pointing to (src becomes dest, and dest becomes src). As I understand it, the shared_array.get() method returns a poin...
Hi, i am currently in the process of maintaining a legacy app. This has quite a few structures like: QMap<QString, QMap<QString, QMap<QString, QMap<QString, QVariant> > > > Dep; As interfaces are hardly used and I only need to make minor adjustments, I would like to keep the structure as it is, although some refactoring might be nee...
Hello everybody. Here is the little code snippet: class A { public: A(int value) : value_(value) { cout <<"Regular constructor" <<endl; } A(const A& other) : value_(other.value_) { cout <<"Copy constructor" <<endl; } private: int value_; }; int main() { A a = A(5); } I assumed that output ...
We've become fairly adept at generating various regular expressions to match input strings, but we've been asked to try to validate these strings iteratively. Is there an easy way to iteratively match the input string against a regular expression? Take, for instance, the following regular expression: [EW]\d{1,3}\.\d When the user ent...
tl;dr: Is there a non-short circuit logical AND in C++ (similar to &&)? I've got 2 functions that I want to call, and use the return values to figure out the return value of a 3rd composite function. The issue is that I always want both functions to evaluate (as they output log information about the state of the system) IE: bool Func...
Hi, How does the Boost Thread libraries compare against the java.util.concurrent libraries? Performance is critical and so I would prefer to stay with C++ (although Java is a lot faster these days). Given that I have to code in C++, what libraries exist to make threading easy and less error prone. I have heard recently that as of JDK...
Hey guys! When I try to do the following in a header file static const char FOOT[] = "Foot"; static const char FEET[] = FOOT; I get a compiler error of error: initializer fails to determine size of FEET. I was wondering what the cause of this is, and if there is a way to rectify it. Thanks! ...
Main Question When should I write the keyword 'inline' for a function/method in C++? Edit: Questions added by seeing some answers... When should I not write the keyword 'inline' for a function/method in C++? When will the the compiler not know when to make a function/method 'inline'? Does it matter if an application ...
I am doing a tutorial on C++ (learning it). The best way to learn is by example. I have little .cpp files with not much in them. I am using the best C++ IDE (Visual C++). Is there a way where I can have a project called "Tutorial Guide" and make my .cpp and .h files, BUT when I run them, it only runs the current file. I have heard that t...
I know Windows uses LLP instead of the LP data model, but is there a predefined variable or something? on OS X/Linux you can use __LP64__. ...