C / C++ Forum

I know that this newsgroup is for pure C++ language questions only, but I wanted to ask where would be an appropriate place to post a question about this, as I can't find any that have any traffic. Thanks, J. W. McCall

Hi! Today we saw the information about lists. We have an assignment about CGI. That's all going well, but we're stuck at the insertion sorft of linked lists -- void voeg_in_lijst(const char* padname, int matches, match *& bestanden) { match *hulp;

Hey there :) Just joined the group, looking for a resolution to a problem I and my three groups members are having (we're students, making an FTP-like server/client as an exam project). We're getting segmentation faults when threading with the following code (this code is not the actual code as it's going to look, but a shortened version...

Hi, The following code produced a core-dump: PropertyParser::PropertyParser(list<HashMap> &p_list) { l_conf_data.clear(); cout << "beginning copy.. size: " << p_list.size() << endl; copy(p_list.begin(), p_list.end(), l_conf_data.begin()); cout << "finished copy..." << endl; }

Hello, I want to convert a value of type T where sizeof(T) <= sizeof(void*) into a void* and back again. I am currently doing it as follows: void** ppvoid = reinterpret_cast<void**>(const_cast<T*>(&x)); void* x = *ppvoid; This works on Visual C++ and GCC 3.4 but I suspect it is not the "correct" way to do things.

Hello! #include <stdio.h> int main(void) { char *p = "hello, world"; printf("%p\n", p);

What is #pragma used for?

Hi, Here I am taking two functions. void f(int,int) and another one is float f(int,int). Is it possible to overload with return values. Thx, kishore

Hi everybody, a guy told me during a job interview that we can't compare directly 2 floats, because in very rare situations we can get wrong results. I googled it, with no result. Do you know something about that? Bye, Andrea

I have a vector of structs. Say I get a new struct that's supposed to replace one of the structs in the vector. I believe I could use replace_if() to do this, but I'm not sure what the syntax would be. Something to do with bind2nd or something, I bet. If there's another struct in the vector who's "id" data member is the same as the new...

Hi, do I have to provide the return type when a function is declared in ANSI C-99? Or would main ( void ) { ... } be enough?

The code below does not cause an assertion failure. fstream f; f.open("myfile"); assert( f.is_open() ); However, the one below does fail the assert:

///////////// start code ///////////// #include<iostream> #include<iomanip> using namespace std; int ReadSquareSize() { int x; cout<<"Plhktrologhse to mege8os tou pinaka, akeraios 8etikos perittos apo 3 kai panw: ";

Hey everyone, kinda struggling with a part of my hw assignment. would anyone know how I could get started.?? here is the question: Graphical Determination of Pi: The full value of pi, which no one really knows for sure, can be approximated by considering the area bounded by a quarter circle. For a quarter circle of radius r = 2 meters, the...

Hello everyone, I am trying to call a text file as an array in the program, that can have up to 100 rows and three column. When I tried to do so, I was only able to call the first line. Can anyone help me to find a way to call all the lines? My data file is as below. 2 5 1050 5 17 1200 3 12 1225 2 23 1300 3 6 1140 3 3...

Been working on a project that compiles, links, and runs fine on 32-bit windows. Now trying to migrate to 64-bit windows. On debug build it works fine. However, on release build the std::map::find operation starts acting odd. My code simply does a lookup, if it fails it inserts the proper element (creating the data element is expensive so I...

Hello C-Experts, Is there any predefined constant in Std C which specifed that the implementation uses the IEEE754 standard for floating point operation ? Regards, Ravishankar

Hi All, I have a doubt in understanding the output of the following program that i executed on my system. I was using DevC++ IDE which uses minGW based compiler. ---------------------------------------------- #include <iostream> using namespace std;

Hi everybody; During my coding, I have encountered a problem.I appreciate if anybody answer it. Here is the simplified code: //Header5.h #pragma once #include <string> using namespace std;

hello people i. can anybody help me, i dont know what is wrong with this class. it has something to do with the me trying to override the input output stream. if i dont override it, it works fine. i would forget overriding it but i have to do it because its a coursework. here is a simple version of the class #include <iostream> #include...

Hey all, I have a bit of code that implements a suffix array, which is essentially an array of iterators or indexes into a string. The array starts out like this String: ABAB Array: 0123 But then gets sorted

What is the standard C/C++ lexicograhic ordering of punctuation characters with respect to each other and the alphanumeric characters? --Masood

hi all, having some problem with locale. I use an std::string, but seems like not locale aware åäö = garbage. How do I make the string aware of my scandi-locale? TIA -- http://www.kolumbus.fi/bob.smith

I'm a newer in C++. I hope to output a string's address. The program is as follows: #include <iostream> using namespace std; int main() { char *str="ABCD"; char *p;

Hi, I am having a CPP file which defines a class: class xyz{ public: int (*funcptr)(void); } A function foo is defined in a "C file"