49,757 Topics
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| | i am planning to start learning how to use threads. my question is: should i first learn windows.h's functions for threading before boost to get the pattern or should i jump right to the boost threads? ps: sry if i posted in the wrong section |
| | hey alll..I posted earlier on needing help for a code on input #..base..print decimal form..I actually didnt learn this in high school so thats why I was having so much trouble :@ Now that I read up and understand the logic in bases..I was thinking that for my code I … |
| | Hi! I don't understand why I can't use my functions declared like this: [CODE]#include "groundArray.h" int groundArray::getlistX(int i) { return x; } int groundArray::getlistY(int i) { int groundlistY[] = {100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100}; return groundlistY[i]; } int groundArray::getlistWidth(int i) { int groundlistWidht[] = … |
 | It's my first time to use functor. So hope can get some guide here. My program need to call different function depend on input. so i thinking to use functor to do that. e.g. main.cpp [CODE]#include "functor.h" #include <cstdlib> #include <iostream> using namespace std; int main(int argc, char *argv[]) { …  |
| | Hi All, I want to trap inRange and outRange event of the bluetooth device i.e. paired with my windows7 machine. Thanks in advance. |
| | Hi, I'm a beginning C++ student and have an assignment to dynamically create an array of a struct to store students' first names, last names, and test grade scores, and then pass it via pointer to a function that will sort the grades and names in ascending order. I wrote … |
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| | Hi I have a code as follow: [CODE] template<class T> inline bool IsValidUnsignedLong(T n) { return (T)(unsigned long) n == n; } [/CODE] When I pass -l to that function, it returns TRUE which it shouldn't since its not unsigned. Can anyone explain to me the reason behind this? why …  |
 | I've been looking and I'm a bit lost about how to change the target of ostream so that I could write to other buffers than the console. |
| | I've managed to use classes in separate files before, but I can't seem to get it to work here. I was just programming some very basic classes for a simple game I wanted to make. Here is the main.cpp file: [code]#include <iostream> #include "energySystem.h" #include "healthSystem.h" #include "intelligenceSystem.h" using namespace … |
| | In writing a logfile program, I need a function to output the log entries between two dates. I use [ICODE]seekg()[/ICODE] and [ICODE]tellg()[/ICODE] to save the position of the first entry to output and last entry and then go back later to output the data in between. However, [ICODE]seekg()[/ICODE] when told … |
| | Ok how do I make a C++ console app format a floppy disk for a Win or Linux Computer? I really want it to be auto-matic like without the whole volume tilte, filesystem; that sutff. PS How would I setup virtual memory in linux? Thanks answer the floppy question first. …  |
| | My program is in an infinite loop, when It hits the "Bye" part in the code it goes right back up to the top. Help with this. It's a pretty simple program so I can't see what I did wrong. [CODE]#include <iostream> #include <windows.h> using namespace std; int main () … |
| | Hey, I have a set of types which are all arithmetic (have operators for addition, subtraction, multiplication, etc.). I want to aggregate any number of them into a single object, so I'm using the std::tuple class template and the <tuple> library (and Boost.Tuple for backward compatibility). My question is a … |
| | [CODE] boost::shared_ptr<resource> resource_ptr; boost::mutex resource_mutex; void test() { if(!resource_ptr) //#1 { boost::lock_guard<boost::mutex> lk(resource_mutex); if(!resource_ptr) //#2 { resource_ptr.reset(new resource); //#3 } } resource_ptr->do_something(); } int main() { boost::thread t1(test); boost::thread t2(test); t1.join(); t2.join(): return 0; } [/CODE] According to the text book, this kind of codes may cause race condition, but … |
| | Ok so i have trouble with looping with while and for statments heres the questions: 1. Write a program that gets a positive integer from the user and prints all the numbers from one to that integer. If the inputted number is zero or negative, then the program will print …  |
| | Ok heres what I want to do: I want to put a file in a console application (during compileation\codeing not running) and when it runs it saves the file in the same place it was run from. Like moving a movie as an exe to hide it while it is …  |
| | i have a code written in c++/Cli (CLR Console app) that uses .Net framework. it basically uploads a file to a ftp server. i wanna run it on computers that dont have .net framework. and are running windows xp or windows 7. can i somehow convert it into win32 console …  |
| | Hi, I am trying to a play a .wav file in a C++ program. I think my code is OK, but when it plays, it plays the default windows 'error' sound, not my .wav file. This is the program: [code] #include <iostream> #include <windows.h> #include <mmsystem.h> #pragma comment(lib,"Winmm.lib") using namespace … |
| | friends i m using vc++ 6.0 and oracle 10g version.i created mfc file and connected database. i done insert and delete operation.but i cant check or view the data(table).can you any one tell how to do? and any other option 2 view the database thanking you |
| | Well im having this problem on how to add large integers. I have used strings to take in a very large number something that can work on as many digits as you need it to. I take in 2 strings for the numbers you want to add. After which I … |
| | Hi, I am almost done with C++ and my project is on Resistors. The problem is that when i try to tun the program, line 37 and 34 has an error saying "no match operator". It is the same as line 28 and 31. Then when I make line 34 … |
| | What I would like is when I input the file path in the console window (lets say C:\hello.txt), I would like it to create, open, then write text into the file. Here's an example of my code. [CODE]#include <iostream> #include <fstream> #include <string> using namespace std; int main () { … |
| | I am trying to learn c++ from a textbook (as so many others) but am having a really hard time following this example: Write a program to input and display a sales file. Each input line contains an integer ID number and a sales amount. When the end of the …  |
| | What does it mean if there is an ampersand right before the function name? Something like: int& myFunction(int& a, int& b) Also my book said something about how it doesn't create a copy of something if you pass it by reference, but what exactly does that mean? I never understood … |
| | Working with dll i got into a situation where loading a dll can cause security threat. lets say for example when you load a DLL, it gets same access privilege as the calling process. So if calling process is running with Admin privilege the loaded dll gets the elevated privilege … |
 | I am still having major trouble with my openGL model program. The big issue is that I cannot figure out how to debug it since I am saving the important data to the graphics chip using vertex buffer objects (VBOs) so at least as far as I can tell, I … |
| | there are 2 common ways to loop through a vector 1: [CODE] vector<int> myvec; // let's assume it's initialized for(int i = 0; i != myvec.size( ); i++) { // code // access by 'myvec[i]' } [/CODE] 2: [CODE] vector<int> myvec; // let's assume it's initialized for(vector<int> :: iterator i … |
| | Can someone help me on how to handle an exception (warning) box in my C++ application? When I run my application in launches an exception box (warning in particular) with two buttons "Break" and "Continue". When I click the continue button the application then runs successfully without errors. What I …  |
| | Hello all, This is my first post here. I've exhausted every resource I can think of in hopes of figuring out what I'm doing wrong, but I can't seem to get it right. I'm doing a homework assignment where I have to solve the 8puzzle problem using BFS, DFS, Iterative … |
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