49,757 Topics
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| | I am trying to do this C++ homework, my second one, i am very new to this and have no idea what is going on i would appreciate any help. thank you. below is the homework problem and what i have so far. i know that i need to create …  |
 | So I've been working on two small programs to calculate prime numbers, fast and memory efficiently. Both my algorithms are based upon the 'Sieve of Eratosthenes', and I know that the 'Sieve of Atkin' would be the way to go since its faster, however I'm just trying to optimize the … |
| | Does anyone know if there are any issues in using the basic ODBC Api for database access on 64 bit Windows Vista/7 systems? This has been my preferred database access technology for a long time, and I'd prefer not moving to ADO or something else if I don't have to. … |
| | So I am trying to compile this program, and I know that the only problem with my code has to do with the "while" section of the do while loop, either that or something to do with those variables. I declared the variable "repeat" as a char, and prompted the …  |
| | hi all. i need to work with CvFitLine , but i can't find any examples of what it does. basically i need to take a set of points (lets' say 3) , draw a line between them, and than i need for every point sum the distance of the point … |
| | So I'm working with OpenGL, and DevIL to load some JPEG into my program, and I've had some trouble, I've isolated the program in a simple sample program (uploaded), the program is, that when I load the standard file, that came with the guide ("Geeks3D.jpg") it loades instantly and runs … |
| | I want to select 5 points set from n given points one by one exhaustively. In other words i want to do nC5 in c++ but not getting a simple way to do it. Please tell me any solution. |
| | hi, can somebody please tell me what would be the problem that it couldn't open the file? i compiled it in dev c++ and it gives me no error. the file 512.dat is in the same directory. [CODE]#include<iostream> #include<fstream> #include<stdlib.h> #include<stdio.h> const int sc = 768; int main() { int … |
| | I need to develop a C++ DLL in a legacy system, so I have to work with Visual Studio 6.0. The project I am working with was copied from a "template" project that someone created a long time ago. I copied it, made lots of changes then realized I also …  |
| | Hello everyone....this time a have a competition program that I want ur help but this time i just want from u answers to some problems that i faced when i was working on it : this is the program: Mail merge is a software function describing the production of multiple … |
| | hey everyone, so im trying hard to get this assignment done by tomorrow but after sucessfully compiling, I am now getting linker errors. I have to use Vi for this assignment but never the less here are my linker errors: assign5.o: In function `main': assign5.cpp:(.text+0x1026): undefined reference to `Print(cStudent (&) …  |
| | Hey everyone, I am writing a program for my c++ class to take student records and organize them according to the students last name. All data is stored to a class and I have created an array of class objects(its part of the assignment). I am using Vi to compile … |
| | It seems even if I place #define _CRT_SECURE_NO_WARNINGS at the top of my C++ source files, if the warning level is set to 3 or 4 I still get all the warnings. Is this the way it is supposed to be? I like to have my warning levels set fairly … |
| | I need help with running two function at the same time . MultiThreading? [CODE]void Function1(int n) { while(n<10) { n++; } } [/CODE] [CODE]void Function2(int n) { while(n<20) { n++; } }[/CODE] If these are the 2 functions,can someone tell me how I can start the 2 together [B][U]from int … |
| | Hey everyone, Browsed through the forums and a C++ book, but can't find what I'm doing wrong. 1)Goal is to pass colors array to a function that picks a color set from 19 options and modifies red, green, and blue to be used in an allegro function. Each color set … |
 | Hello, I just started reading and learning DirectX SDK's tutorials in order to develop skills for game programming. I don't know COM very well (i just start learning it). I read lights, materials, mesh and BasicHLSL DirectX9 tutorials (line by line). I know C++ and math (not VERY good math … |
| | Hello all: I am quite new to C++; so far I have used it for finance-related database management. I need to incorporate code for solving an algebraic problem and I am stuck on how to write the code. I would be grateful for any assistance! The problem I want to … |
| | I'm having a bit of trouble getting string input while i'm in a function. I was wondering how I could input a really long string (about the size of a paragraph). cin >> entryA seems to work, but only with 1 word. Any more and it starts looping getline(cin, entryA); … |
| | Hello! I'm beginning learning C++ and I was wondering, does Visual Studio 6.0 support all of the language features or is it too outdated now? If so are there any free compilers/linkers that I can use for windows programming? I'm also worried about the windows API headers being outdated as … |
| | I want the extract the two values(113.654321 and 114.654321) from the CString CString sValue = "113.123456 114.654321"; I tried to use the TrimLeft function of the CString Class, which is sNewValue1=svalue.TrimLeft(_T(" ")) and sNewValue2=sValue.TrimRight(_T(" ")) but I cannot get the expected value. Can anyone help? Thanks in advance! |
| | As part of my coursework, I have to test my program on a different operating system to the one it was created on, XP. Anyone know of a good compiler for a mac since it is only other sytem in the school? |
| | Hii, The problem statement i am referring to is: Buttons Each cell of an N x N grid is either a 0 or a 1. You are given two such N x N grids, the initial grid and the final grid. There is a button against each row and each … |
| | hey guys! so I need to create a matrix 6x6 and then fill it with random numbers from 0 to 3.... and I need to leave the diagonal of the matrix with 0s... The rows are supposed to be soccer teams so if row 1 wins row 2... the program … |
| | Hey all! I have this assignment for my school project to create a simple address book using classes that do the routine stuff like adding a contact, searching it, modifying it, deleting it... Here is the code but it won't run properly. I tried but couldn't figure it out. It'd … |
| | I have been searching my texts, the web, and DaniWeb for information about how to share data between compiled C++ executables. I've been studying extern variables and named pipes without success. A typical program calls another program like this: float Pi = 3.14; system("AdjustSeaLevel.exe Pi 5.4 11.2 c f g"); … |
| | Hi , M Using the boost library for shared memory . where internally this locking takes place. But due to some reason thread holding the lock died .So when other thread tries to lock the mutex. I t should throw EOWNERDEAD. But here it hangs. (gdb) s 358 mp_mutex->lock(); (gdb) … |
| | I need to write an overloaded function for a pascal triangle. I have to include another function that fits n!/((n-r)!r!), I can't figure it out. Help please! This is what I have so far: [code] #include "stdafx.h" #include <iostream> using namespace std; int my_fib(int,int); int x,y,j; int main() { x=0; …  |
| | Hey guys, I'm new to C and I am trying to find a way to create a file with the following array: [code] char peer1_0[] = { 0x0c, 0x4c, 0x08, 0x00 }; [/code] The original array has a lot more data, but I am just needing a simple example or … |
| | I think I have a good starting point on this, but I still need some help :) First I need to ask the user for the limits of integration and the error tolerance, (that's already done). So when I divide the trapezoid (when the end points are connected) in 2, … |
| | I have to give this in around 10 hours and i still have lots to do. Please report any bugs; Its a scientific calculator, also supports [B]sin, cos,tan and log [/B] Take care to [B]put the entire expression under brackets[/B] For example, a valid input will be:- (5+4*-3+sin(43+7)+cos(90/2)) I've attached … |
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