49,757 Topics
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| | Hi All, If i have choice to either use simple array(char a[]) or map. Which one i shall use, whether array or map. i need to know wich technique will give better performance. As per my requirement i will insert the element in array/map, find the element based on index. …  |
 | I have a function double Max(vector<geom_Point3> &Points, int n); Then in another class, I have a private member: vector<geom_Point3> Vertices_; and in a class function, I call: min_x = Min(Vertices_, 0); however, I get [code] error: qualifiers dropped in binding reference of type "std::vector<geom_Point3, std::allocator<geom_Point3>> &" to initializer of type … |
| | Hi, I have been developed a SDI application. I want to show icon or bitmap at menuitem. I already tested codes below, but it's not working??? I got assertion failure error... I need help??? [code] private: CBitmap m_bmpMenuFileNew; //File new bitmap (Checked and unchecked) CBitmap m_bmpMenuFileOpen; //File open bitmap (Checked … |
| | Hello, I need help to solve the problem in my app that uses structs. I have for example this struct: [CODE] struct SimpleStruct { SimpleStruct(): hasVars(false){} ~SimpleStruct(); AnotherStruct SimpleVariable; bool hasVars; }; [/CODE] and in the code, initializing this struct goes ok, but when the class, that has this struct … |
| | Hello I am trying to write a program that prompts the user for 3 test scores, averages the 3 test scores, and keeps repeating until the user enters "N". My problem is that I am creating the average and exam scores as data type double but in order to check … |
| | Hello, I'm new to C++ and I need help figuring out how to send information to the rs232 port. It's going to be one way communication (PC to device). I've tried reading other tutorials, but none of them clearly explain what's going on in each part, so I often get … |
| | Hi, I have been created a tab control in dialog box (we called as Dialog Main). I add 3 frameless dialog box (we called as dialog A, Dialog B, Dialog C) in the tab control. The tab control working fine. I add three button (OK button, Cancel button ,Apply Button) … |
| | Would anyone happen to know A. The header file for standard winsock use and B. a helpfull tutorial on basic winsock client/listen string transfer? Help is much appreciated, thankyou. |
| | I want to read each line of text file and store each line into a giant buffer so I can look at all the contents. How would I do this? [CODE]int _tmain(int argc, _TCHAR* argv[]) { ifstream indata; // indata is like cin indata.open("example.txt"); // opens the file if(!indata) { … |
| | I am trying to copy the first three characters of a character array into another character array of length 3. For instance, if I use char trig [10] = "cos(50)"; //declare and assign the char array "trig" char t [3]; //declare char array t to store the "cos" part of … |
| | Alright so i have this assignment to do. The question is as follow's. ------------------------------Question------------------------------ Write a command line program titled joinTextFiles.cpp that concatenates the contents of several files into one file. For example, the following command line joinTextFiles chapter1.txt chapter2.txt chapter3.txt book.txt will create a long file titled book.txt that … |
| | Hi! Iam writing a program that makes .nfo's for torrents. The program contains lots of user input and I need a data type to store words and sentences. I have try ed to use the String objective but i t dosent work. Thanks dor the help in advance, best regards …  |
| | Guys I am an intermediate c++ programmer and want to start win32 programming in c++ but the problem is that how start . I mean where to get win32 libraries including windows.h , resource.h etc. I downloaded the win32++ generic downloads . It gave some libraries and I copied them … |
| | So I have figured out everything with this program, except one thing which is escaping me. I have created a General Tree(or sometimes called left most tree) where the node points to its left most child, and the child points to its right sibling and also its leftmost child. Creating …  |
| | I am using MS Visual C++ to do a "quick" little project to create a tiny dll that I need. I hope this is the correct forum for this question. I have a fairly simple project that compiles with no errors but, when I try to build it, I am … |
| | hi, im creating a library, in which there is a winproc that is started in a function called StartMessageLoop. This function is started as a seperate thread from another function called Init. heres the code: [CODE] void MyClass::Init() { //...some code _beginthreadex(NULL, 0, StartMessageLoop, (void*)NULL, 0, 0); WaitForSingleObject(m_VALIDHWNDEVENT, 10000); //...some … |
| | Greetings. Would anybody happen to have a prebuilt GNU MP Library (static) for Visual Studio 2005? I cannot seem to find one and cannot compile it myself. When I attempt to use it, I get unresolved symbol errors. If this is not possible, does anybody know a simple class or … |
| | Guys Im alwayz having a syntax error which makes my form designer to dissappear and that scares the hell out of me coz Im writting practical test tomorrow, and what I wana know is what could be the problem, I will paste the details of the error maybe U will … |
| | Hello, I want to save the image binaryImage in a file (bmp) so that I can open binaryImage.bmp and this way working with it in another programme. I have tried different ways (see below) but I don't find a solution. I have no idea how to use this method.Could anyone … |
| | I've downloaded and compiled wxWindows using VC++ 2008 Express. Also am able to compile/link the Calculator example program (haven't tried the others yet). Now I want to begin writing my own program. So I searched google for tutorials to help get starte. None of them contain main(), and neither does …  |
| | I was wondering if anyone could provide any advice on how to create and use a dynamic library using gcc on Linux and/or OS X. I've been working on an in-house image viewer application for the CS department over the summer and have been intrigued by my professor's constant exhortations … |
| | I've taken C++ courses before but never programmed any GUI applications. Well for this job I was asked to program a GUI for a solar hybrid project that displays information such as battery charge, temperature, etc...sort of like the thing you see in a Prius. Can anyone give any recommendations … |
 | Hey, I got bored so decided to make this pointless program but am a bit confuzzled.. [CODE=C++]#include <iostream> using namespace std; int main() { int decision; do { system("cls"); cout << "Welcome to my pointless menu!" << endl; cout << "1 : Do Nothing." << endl << "2 : View …  |
| | Ive been having some trouble getting my Nqueens program to run for n>=9. I use a function bool PlaceQueens(c) to recursivley find all solutions using a backtracking algorithim , it seems to return neither true or false. For n=9, the function PlaceQueens exits without returning a value during call 4296. … |
| | Hi mates well i have a problem i used fstream in console mode in a class function and worked fine the txt file was created and tha data were written normally when i copied this class in the cpp file in vcl enviromen and made some changes and gave the … |
| | I can not understand why I am getting this memory leak. First, here is the ouput from valgrind. [code] ==27078== 24 bytes in 1 blocks are definitely lost in loss record 45 of 827 ==27078== at 0x4A061A5: operator new(unsigned long) (vg_replace_malloc.c:167) ==27078== by 0x434B8F: ETArray::ETArray(QString const&, QWidget*) (etutils.cpp:343) ==27078== by … |
| | I'm getting a really odd error in my program. The lvl value retains its initial value if it's left alone, but when the program runs after you've assigned it a value it get's a ridiculous number... then the previous number after another assignment... and the process continues. Here's the code. … |
| | Hi, I have the following C++ code [code] #include <string> #include <iostream> //maybe std::string using namespace std; int main() { size_t r = 134480; size_t c = 268960; size_t **opt; opt = (size_t **)malloc(r * sizeof(size_t *)); if(opt != NULL) { opt[0] = (size_t *)malloc(r * c * sizeof(size_t)); if(opt[0] … |
| | Hi, I have dates/times in UTC, and need to convert them to New York time. My pc is not based in new york, so I cannot use the local time. So far I have found: BOOL WINAPI SystemTimeToTzSpecificLocalTime( __in LPTIME_ZONE_INFORMATION lpTimeZone, __in LPSYSTEMTIME lpUniversalTime, __out LPSYSTEMTIME lpLocalTime ); lpTimeZone: A … |
| | I understand that visual studio has a nmake tool for building a project from a makefile. What I want to do is to be able to build my project outside the Visual Studio IDE, from command line using nmake. I found some tutorials about writing a windows makefile for nmake, … |
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