Hi all, While writing some code i came across this issue: #include <iostream> class random { public: random(){ std::cout << "yay!! i am called \n" ;} }; random r1 ; int main() { std::cout << "entry!!\n" ; static random r2; std::cout << "done!!\n" ; return 0 ; } When i try to compile this code i get the error error: ârandomâ d...
Should a C++ (implicit or explicit) value constructor accept its parameter(s) by value or reference-to-const, when it needs to store a copy of the argument(s) in its object either way? Here is the shortest example I can think of: struct foo { bar _b; foo(bar [const&] b) // pass by value or reference-to-const? : _b(b) { ...
Extends. I thought I was being cool when I did something like: bool hasParent() { return this->parentNode ; } Even with a (bool) cast, the warning still doesn't go away. Where this->parentNode is NULL when there is no parent node. But I'm getting: warning C4800: 'Node *' : forcing value to bool 'true' or 'false' (performance w...
I wanted to know why the default value for a variable for a method of a class, cannot be a non-static method or member of the same class. Is there a reason for that ? Could not the compiler provide to the method the position in the class of the non-static default value ? I tried to google quickly for an answer but I could not come up w...
Follow up of this question: When I do include <iostream> . It happens that it includes many files from /usr/include .A grep "\usr\include" over g++ -E prog.cpp counted to about 1260 entries ;). Is their a way to control including various files? Platform: Linux G++ version: 4.2.4 ...
I want figure out the call sequence and functions to kernel32.dll in a function example() in example.DLL. In windbg, how to set breakpoint on all functions in kernel32.dll? I tried bm kernel32!* , but seems not work. ...
Hello, when I run my program everything goes fine. At the end it prints out this: *** glibc detected *** ./streamShare: double free or corruption (fasttop): 0x08292130 *** ======= Backtrace: ========= /lib/tls/i686/cmov/libc.so.6[0xcc2ff1] /lib/tls/i686/cmov/libc.so.6[0xcc46f2] /lib/tls/i686/cmov/libc.so.6(cfree+0x6d)[0xcc779d] /usr/li...
I need to pass some data (integers) from one (C++) program to another (C#). What is the fastest way to do this? P.S.: OS: Windows XP ...
What is the biggest "no-floating" integer that can be stored in a double C type (IEEE) without loosing precision ? ...
My program reads a list of integers from user input [ keyboard] and calculates some statistics The user enters 'x' to terminate the input process. So for example, Enter integers separated by space ( enter x to quit) : 1 2 3 4 5 x But now I want to include the inputs to be read from file redirection also. So if the numbers followed ...
I have a container of regular expressions. I'd like to analyze them to determine if it's possible to generate a string that matches more than 1 of them. Short of writing my own regex engine with this use case in mind, is there an easy way in C++ or Python to solve this problem? ...
I'm having a discussion about which way to go in a new C++ project. I favor exceptions over return codes (for exceptional cases only) for the following reasons - Constructors can't give a return code Decouples the failure path (which should be very rare) from the logical code which is cleaner Faster in the non-exceptional case (no che...
Hi all, I'm completely new to c++ and Qt. I want to populate a QTextEdit object with QTextBlocks, how do I do that? e.g. If I have the sentence "the fish are coming" how would I put each word into its own QTextBlock and add that block to QTextEdit, or have I misunderstood how QTextBlock actually works? ...
This is the provided function template I'm trying to use: template <class Process, class BTNode> void postorder(Process f, BTNode* node_ptr) { if (node_ptr != 0) { postorder( f, node_ptr->left() ); postorder( f, node_ptr->right() ); f( node_ptr->data() ); } } This is my call, and the function I'm passing: v...
Hi. I am creating a simple Unix server written in C++ that simply waits for incoming connections, and then when a connection is established, it sends the requested data back to the client's browser to be displayed. I have everything working except for the sending of the data to the client. This is how it should work: I start server and...
I have some .h files as follows (on Linux) Source/Server/connect.h Source/Server/message.h ... I am developing another application that needs the two .h files but is in a different directory Source/App2/.. How can I include the connect.h file in the App2 application, considering that I use perforce and everyone else working on the ...
I´m writing two litle c++ apps that must communicate. First one will be a service which, every once in a while, must alert the user for something. Since a service cannot create windows I designed the app to be two separate executables. The service will use a notifier to communicate. The service needs only to send text messages to the n...
So how i can do this? So that no member function can change the value of its data members once object has been initialized in C++. ...
So... I understand this might be subjective, but I'd like some opinions on what the best practice for this is. Say I have the following header and .cpp file: header: // foo.h class foo { public: int bar(int in); }; cpp: // foo.cpp int foo::bar(int in) { // some algorithm here which modifies in and returns the modified val...
I really like the console and got recently hooked on programming console applications using nCurses mainly in conjunction with the C programming language. Unfortunately i think the ncurses API is totally borked and very hard to use, and the C++ bindings are undocumented. So my question is, what is THE API to use for C++ console applic...