I have a class defined like this: class MyClass { int x; public: MyClass(int x); }; MyClass::MyClass(int x) { //Assign x here } However, I can't initialize x in the constructor because it has the same name as an instance variable. Is there any way around this(other than changing the name of the argument)? ...
Hi, I created a .properties file that contains a few simple key = value pairs. I tried it out from a sample c++ console application, using imported java classes, and I was able to access it, no problem. Now, I am trying to use it in the same way, from a C++ dll, which is being called by another (unmanaged) c++ project. For some reason...
Consider the following code: class A { B* b; // an A object owns a B object A() : b(NULL) { } // we don't know what b will be when constructing A void calledVeryOften(…) { if (b) delete b; b = new B(param1, param2, param3, param4); } }; My goal: I need to maximize performance, which, ...
I am creating a data-parallel program using pthreads and C++. From http://stackoverflow.com/questions/1151582/pthread-function-from-a-class, I found out how to supply pthread_create with a function pointer to a static C++ function(and supply it a this argument). However, I also need to supply the thread with an index, so it knows what d...
First, COM is like black magic for me. But I need to use COM dll in one project I'm working on. So, I have a DLL I am developing and I need some functionalities that are available in a separate COM DLL. When I look to the COM DLL with Depends.exe I see methods like DllGetClassObject() and other functions but none of the functions I'm i...
I have a method like this : bool MyFunction(int& i) { switch(m_step) { case 1: if (AComplexCondition) { i = m_i; return true; } case 2: // some code case 3: // some code } } Since there are lots of case statements (more than 3) and the function is becoming large, ...
can someone explain to me why the following results in b = 13? int a, b, c; a = 1|2|4; b = 8; c = 2; b |= a; b&= ~c; ...
How can I use a std::valarray to store/manipulate a 2D array? I'd like to see an example of a 2D array with elements accessed by row/column indices. Something like this pseudo code: matrix(i,j) = 42; An example of how to initialize such an array would also be nice. N.B.: I'm already aware of Boost.MultiArray, Boost.uBlas, and Blitz++...
Hello. My question is simple. When I use STL containers, do they copy the value I store there (by using copy constructor) or not? What if I give them array of characters (char *) instead of string instance? How do they behave? Is guaranteed that information will be stored in heap instead of system stack? Thanks for answers. ...
when I include the "xmacro.h" in header file which is used by multiple header files i get linking error: Error LNK2005: "char const * * iD_Strings" (?iD_Strings@@3PAPBDA) already defined in header_file.obj 1.//"xmacro.h" 2. 3.// (1) Define code generating macro 4. 5. #ifndef XMACRO_H 6. #define XMACRO_H 7. 8. #define GENERATE_IDS...
Ok I know the few rules of Sockets 1. Open ports ... Now how would i go about port forwarding in C++ to open the port to use for my application? ...
I am somewhat new to unicode and unicode strings. I'm trying to determine the difference between "fullwidth" symbol and a normal one. Take these two for example: Normal: http://www.fileformat.info/info/unicode/char/20a9/index.htm Fullwidth: http://www.fileformat.info/info/unicode/char/ffe6/index.htm I notice that the fullwidth is def...
I've created and registered a managed COM library in C# on my development machine. I've successfully registered it and created a .tlb file with regasm, and successfully imported the tlb into a c++ console app used for testing. My COM assembly is called "efcAPI.dll" and it references another assembly that has not been set up for COM or r...
I use that function to get my texture from the graphics card, but for some reason it doesnt return anything on some cards if miplevel > 0 Here is the code im using to get image: glGetTexImage(GL_TEXTURE_2D, miplevel, GL_RGB, GL_UNSIGNED_BYTE, data); here is the code i use to check which method to use for mipmapping: ext = (char*)gl...
I know there are tools like PE Explorer for inspecting the contents of DLLs on windows (exported symbols, etc). Is there something similar for static libraries? I'm linking against a third party library that's generating some linking errors, and I want to double check that the symbols I expect are indeed being provided. ...
I'm trying to build a char array for storing the return value of a function. In the following function the data is stored in ***valv. How to build a extern variable to access the data? int credis_lrange(REDIS rhnd, const char *key, int start, int end, char ***valv) { int rc; if ((rc = cr_sendfandreceive(rhnd, ...
Hi, Is the fastcall calling convention really faster than other calling conventions, such as cdecl? Are there any benchmarks out there that show how performance is affected by calling convention? ...
I have been able to find a lot of information on actual logic development for games. I would really like to make a card game, but I just dont understand how, based on the mouse position, an object can be selected (or atleast the proper way) First I thought of bounding box checking but not all my bitmaps are rectangles. Then I thought f m...
I'm trying to run my very first c++ program in linux (linux mint 8). I use either gcc or g++, both with the same problem: the compiler does not find the library I am trying to import. I suspect something like I should either copy the iostream.h file (which I don't know where to look for) in the working folder, move my file to compile ...
I installed Eclipse and I can get g++ to compile the code correctly; however, when I start the debugger none of the "cerr >>" outputs are ever displayed in the Eclipse console. I tried to run GDB manually and it, too, does not display the cerr output. Is anyone else experiencing this?? I am running the GDB 5.3-something that is available...