Although I use std::vector almost all the time, I am interested in understanding as much as I can about pointers. Examples of what I am talking about: char* array[5]; // What does it mean? // 1) pointer to an array of 5 elements! // 2) an array of 5 pointers? I am interested in the precise definition of this declaration. ...
Hello, Recently I've started to notice a lot of smirks and generally rude comments whenever I mention C#. Everyone I talk to either says learn Python or learn C++. Python is a nice language, I get it. But I don't find much use for it right now (for my use cases), and C++ I heard is a faster language (not sure). So my question is this...
Why reference types and pointers are same in compiled code?(You can see in third and fourth line). I tried to figure it out but apparently I could not achieve. If a reference type variable must be initialized at declaration and can not be changed so is there any need to do indirection as in pointers? int x = 10; mov dword ptr...
Is it possible to specialize particular members of a template class? Something like: template <typename T,bool B> struct X { void Specialized(); }; template <typename T> void X<T,true>::Specialized() { ... } template <typename T> void X<T,false>::Specialized() { ... } Ofcourse, this code isn't valid. ...
Hi, Suppose a have a fairly complex class I'm working on. Half the methods are done and tested, but I'm still devolping the other half. If I put the finished code in one cpp and the rest in another, will Visual Studio (or any other IDE for that matter) compile faster when I only change code that's in the "work-in-progress" cpp? Thanks!...
I'm trying to write a basic, singly-linked list class in C++. I did it in my data structures class years back, but I can't remember the details. Should my Node class have a copy constructor? It has a Node* as a member variable, and as far as I know you're always supposed to write a copy constructor, destructor, and assignment operator f...
Hi all, I've got the mouseclick handler correctly set up. I have a drawing with some shapes. Is there any way for me to fill the surrounding part of a point until it hits a polygon boundary. Something like Microsoft Paint's "fill" command. Thanks! ...
Anyone have any clue what this error might actually mean? I'm tripping on a bit of code that can't seem to get around it. I've tried it with just h*2 instead of hprime, and just w*2 instead of wprime. Every time I get the same compiler (g++ compiler) error of : grid.cpp: In constructor ‘Grid::Grid(int, int)’: grid.cpp:34: error: ‘hpri...
Hello, I have a char* string that I have encoded using AES encryption. This string contains a wide range of hex characters, not just those viewable by ASCII. I need to convert this string so I can send it through HTTP, which does not accept all of the characters generated by the encryption algorithm. What is the best way to convert t...
Hi, I am not getting Why Size of Class with a member function is 1 byte..While member function is 4 bytes in the following example. class Test { public: Test11() { int m = 0; }; }; int main() { Test t1; int J = sizeof(t1); int K = sizeof(t1.Test11()); return 0; } Here J becomes 1 Byte an...
class Base { public: int i; Base() { cout<<"Base Constructor"<<endl; } Base (Base& b) { cout<<"Base Copy Constructor"<<endl; i = b.i; } ~Base() { cout<<"Base Destructor"<<endl; } void val() { cout<<"i:...
Hi, there Today I've stepped into a problem I thought was so common I got myself wondering why only now I've noticed it. Imagine you have a class you want to handle using a boost::shared_ptr<>. This class has members that must forward shared_ptr<>s of itself to other methods; in other words, it has to create a shared_ptr<>s to the this ...
I've tried everything. Even java's forumla: java.lang.String.hashCode(): s[0]*(31^(n-1)) + s[1]*(31^(n-2)) + ... + s[n-1] I've interpretted this as a sum: Although I am not quite sure what to do with the s[n-1]; int hashmap::hashstr( const char*const str ) { int result = 0; int i = 0; int j = 0; int k = 0; unsig...
Hello! I'm working on a project that's going to print out to a bitmap(more specifically a RAW, but that's not important to the question), but I'm working in a 2-D array in-program. I want to be able to draw a line from point (a,b) to point (x,y) for any arbitrary values of a,b,x, and y. I don't need anything fancy like anti-aliasing; a...
I know C++ from college, vaguely. But I was reading somewhere that sometimes PHP is simply not fast enough and that real compiled code has to sometimes "Do the heavy lifting" what is the api in C++ to do this? Or whats the best way? I havent the slightest idea. What I do have is so experience writing old school C++, a linux box, a C+...
I am looking after a huge old C program and converting it to C++ (which I'm new to). There are a great many complicated preprocessor hacks going on connected to the fact that the program must run on many different platforms in many different configurations. In one file (call it file1.c) I am calling functionA() and in another file (call ...
Hello I'm using WinHTTP IWinHttpRequest object. I do POST to a https domain specyfying a request body with credentials. The site is expected to return cookies in HTTP response. The code works in Wininet - but I don't know how in WinHTTP to get cookies from the HTTP response? Can anybody help? Dominik ...
I recently started learning DirectX/Windows, and the book I'm learning from had the code d3d = Direct3DCreate9(D3D_SDK_VERSION); if(d3d == NULL) //catch error &c. My question is: What would cause an error in this line, that is different than what would cause an error in another line (say, for example, int num = 42)? ...
I need a recommendation of a free tool (even for a trial) for detecting memory leaks in C++ under Windows (Visual Studio 2005). I've looked in the net, but I would prefer a recommendation. ...
Is that right that C# can be reverse engineered? How is easy to do that? Can we say the C# is not enough good from safety aspect? And what about C++ compared with C# against decompiling? ...