C / C++ Forum

Hi, If I have a class A without a default constructor, and I try to create an array in the fillowoing way: A arr; I get a compilation error. why when I use

i have got a quizz to write a programm that gives the sum of all even numbers between two variables x and y and then displays the sum. Include both x and y in the total sum. Any one here can help me............ ?

hi group: i've been struggling with this simple problem with dismay i need all the file names in a directory since the number of files in a directory is unknown, a friend here in the group hinted me to use dynamic memory allocation: namely functions like malloc etc in the spirit of code re-use

Hi all, I have gone through the FAQ and done searches in the Comp.Lang and if I have missed it please let me have the ref. (Question generated in part by p119). Given char a;

I have a program I wrote. I compile it and run it but it closes once it is done how do I tell it to pause when done? With C# language I wrote: Console.Readline();

Hi there I am writing a simple while loop which terminates on the condition that a certain value is found, as follows std::string question = q.quest().que(); std::string answer = q.ans().answer(); std::string graphic = q.inf().info(); std::string english1; std::string english2;

Hi I am new user of CImg, n it is my first posting here..:).... I wanna set RGB or HSV pixel value in a single pixel. like....In an image, at (x,y) coordinate I wanna assign my pixel value of RGB or HSV.....R=55, G=66 and B=99..... How can I do it?

hi i have a code which was supposed to read data from serial com (bluetooth) and save in a file. but when i send a audio file from my mobile to pc the program will not read the port i have configured the bluetooth connection for serial communication (i.e from system stray selecting bluetooth icon and from quick connect selecting serial...

I want to know how to write a program in C++ that can be run in background, that running program should check mouse click and keyboard hit even if i am doing something else.

Hi, We have a Win32 application developed in VC++. It has few modal dialogs invoked by function keys. The application runs fine on a normal desktop or laptop in all versions of windows(NT,2000,XP) We are now trying to run in a dell poweredge server. And for some reason, some dialogs are not coming up.

hi there I was looking for some way to use bit field with Arrays something similar to struct Tmp { int iVar : 1; // each element of Aray having size as 1-BIT } it is possible ??

hi all, i once learnt from you guys to use _getcwd(pathbuffer, 255); with direct.h included to get the current path. it does work to get the path but it still doesn't work in a sense that when the command locating at the path is called, it doesn't work. i try to add \\ or use "" since the path has several directories and some may have...

Hi! I am trying to specialize a member function of a template class (see code below). The moment the header with the "template class definition" and "template class member function specialization" is included in two different translation units (cpp-files). Problem:

Hi, Currently we are using a CDwordArray type array to store some DWORD data. This data is dynamic and we need to continuously grow the array size using SetAtGrow() . Due to performance reasons, we are planning to try out other possible choices (Cmap,Clist,STL.....). We want to use the Container that has the best performance in terms of...

hello all, I have an application in which I build a list<node>, with potentially thousands of nodes. each node has an "index", and all nodes are ordered by this index. this index reflects a value that has been computed before, and will range from 0 to N. node 0: index 0

Hello! I just wonder if it's possible to overload a method only by having a different return type. //Tony

Hello All, I have the following two classes: class testb{ private: int b; public: void friend_of_testa(); };

I keep getting the same warning and I'm not sure how to fix it. Here's what my program looks like. The warning is an error C2065 and it's telling me that numWin and numDoor are unidentified variables. Can anyone help and soon? # include <iostream> using namespace std; int main () { double wallCost=25, winCost=18.73, doorCost=15.99; int...

hiyer, say you've got a 32 bit int - is there a nifty way to shift that whole value right by 4 bits and at the same time collect the 4 bits that are being shifted off the edge to the right into another variable? i'm hoping for a way to do it in one foul swoop ... ? probably not, but just wondering if there's a better way than the obvious :...

a && b || c is evaluated as (a && b) || c or it is evaluated as a && (b || c)

I'm going to do something like this #define INSPECT( FILENAME,) \ ofstream FILENAME("FILENAME.out");\ For example, I want "INSPECT(abc)" open a file with name "abc.out", the file object's name is "abc". I tried the following code, but it still doesn't work. #define INSPECT( FILENAME,) \

Suggestion to group: Let's have Dan and Keith summarize the month's "going's on" and write a synopsis. I have to work so much more lately, that I can't keep up. Can we just have a "Point - Counterpoint" once a fortnight, to keep me up on "important" issues?

Hi, I got a code snipset that gcc refuses to compile. I am note sure however whether this is a bug in gcc, or the snipset is just invalid C code. This is the source code in question: ---- typedef int foo; void bar1 (foo* foo)

I have this struct: struct pcb { void *(*start_routine) (void *); void *arg; jmp_buf state; int stak; };

Hello: I am trying to understand why one of these crash while the other works fine. long recurssion(int t) { if(t <= 1) return(1); else return(t * recurssion(t--)); //crashes