51,593 Topics
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 | I have an abstract class CArticle and two derived classes CBook and CMagazine. I also have a class CLibrary where i want to add articles. Its members are an int variable to count the articles and a double pointer of CArticle. I have the following main function: int main() { … |
 | Hello, I had really less experience in VB. NET (creating small and basic applications, working with progressbars, buttons and other really easy and basic stuff). I know that C# is more powerful (but hard, too) than VB. NET. So, I am deciding to create programs at a more pro level. …  |
 | Hello, I was just noticing that the 'const'ness of references often causes me to rewrite a large chunk of my code with pointers. For example if I have a class that needs access to a large amount of data from another class I would love to use a reference. However …  |
| | Hi, I want to create a music editing program that will allow you to play songs using a MIDI device. I know there are significant differences in the capabilities of VB.NET and C++ but I'm not sure which would be more suited for such a project. Any suggestions? -James  |
| | in my dev c++ i'm not getting the window at the bottom of the screen which shows our errors after compilation..how do i find it..?  |
| | Well this is not as much as something that I dont know how to implement, but more something that I dont know why I would want to implement it. When I have a simple class, say this one: class Cube { public: Cube(int x, int y, int z); int return_area(); … |
| | I've googled for a while and found few things (I hate using external libs such as cURL) and I don't really have experience with HTTP, so the question is: how can I interact with websites using sockets? so something like this: 1. I connect to the website 2. I store … |
 | Greetings, this is my first time posting here, I've been a long time lurker. I have a lab assignment which is: > Write an application where you ask the user to input the price per letter (PPL), and then ask the user to input the sentence they want printed. The …  |
| | I have a Java code block like following: Vector<NameAddress> route = dialog.getRoute(); for ( Enumeration<NameAddress> e = route.elements(); e.hasMoreElements(); ) { // some more to copy route to another Vector<> } I am trying to convert it in C# and here is my code: List<NameAddress> route = dialog.getRoute(); for ( …  |
 | Anyone know how to simulate holding down a CTRL key in C++. I'm using Windows XP. Thanks |
| | Hi all! I'm at work - newly hired:) - and I'm given this mpeg2 video codec [URL="http://www.mpeg.org/MPEG/video/mssg-free-mpeg-software.html"]http://www.mpeg.org/MPEG/video/mssg-free-mpeg-software.html[/URL] and in particular the decoder that exists in the folder mpeg2v12.zip. It is code c written for gcc, so I decided to download MinGW and DevC/C++. I add all the files to the … |
 | i need help in this program. The program question is: A function power which will calculate a number m to the power n (m^n). You will pass two parameters float & int. If the parameter n is omitted then it should taken as 2. i hope u all got the … |
| | Hi guys! My groupmates and I need suggestions on what C# project should we make since we need to pass a project proposal on our OOP subject which is to be submitted on the end of the semester. This project does not need to be really complicated and as much …  |
 | How to make a pointer to class and how to use it? Like, what would the cout statements show on screen? #include <iostream.h> void main() { class CLASS { public: int INT; char CHAR; }; CLASS OBJECT; OBJECT.INT = 10; OBJECT.CHAR = 'A'; CLASS *POINTER = &OBJECT; cout << POINTER … |
| | I am trying to write a simple text file translator, will translate the text into morsecode. I need something like this to be done: for(i = 0; i < list.size(); i++) { if(list[i] == character_from_file) { translatedLine = list[i_the_second]; } } I am wondering if I can use the "list" … |
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| | hey there, i need help solvings my lab assignment in chapter 5: control structure II (repetition) 1. write a program that: a. prompt the user to enter an integer number x greater than 1. b. use a flag-controlled while loop to check whether the entered number x is prime or … |
| | Hi there, I have a question related to C++ functions. If a boolean return type function contains too many returns in it, does it cause any problem ?? In my program one of the bool function contains too many return statements, in if conditions. And interesting thing is that it … |
| | Hi My name is C.D., I am currently taking C++ 1, I have an assignment that asks me to write a function that displays the prompt string and then reads a floating point number and then returns that number. The book gives an example of the code to use in … |
| | while (!correct) { cout << "Please enter an angle value => "; cin >> value; //request user to input a value if(cin.fail()) { cin.clear(); while(cin.get() != '\n'); textcolor(WHITE); cout << "Please enter a valid value. "<< endl; correct = false; } else { cin.ignore(); correct =true; } } Hi, this … |
 | Illegal else without matching if, but I have an if after else. :( And how can I round off the results? I mean, if it shows 4.5 it would display 5 and if it's 4.5 it would display 4? Please help me. :((( |
| | I want to open any website using me c++ program. But don't know ho it will be done, please help me. |
| | Hello, First of all some background. My friend and I are having a bit of a competition over theoretically infinite number storage. We have agreed that the first person with a working arbitrary precision integer library with the theoretical ability to store an infinitely large number (IE: if the hard … |
 | Hey i try to work on custom signal but i get an compiling error: QObject::connect: No such signal QLabel::changerSignal() in ..\textbasedrpg\FenPrincipale.cpp:173 But i seem to write exactly same thing in header and .cpp »That an big moment i try to see what i do incorrect but can't find. Same an …  |
| | These are two simple programs. In first program, i used static array, while in second program i used dynamic array. Both programs do the same job i.e. initiaze the array by asking the user to enter the their test scores. The problem is: 1)i have read in many books that … |
| | In my *Java to C#* Conversion Project, at one point I came to use java's `startsWith(string prefix, int toffset)` method. I used a substring to solve it for C#. Java Code Snippet: String str1 = "one over the coocoo's head"; String str2 = "someone"; System.out.println(str1.startsWith(str2, 4)); C# does not have … |
 | I wrote a simple c++ program which takes a password and then shows a message for the intended person. Now i want to crack this program with another c++ program by using password cracker. How to use another c++ program to brute force this program?  |
| | [Click Here](http://s1146.photobucket.com/user/HTHVampire/media/C%20plus%20plus/Capture2_zps4d967f99.jpg.html) Here's the formula to compute sinx and cosx in C++. here is the code I wrote at first to calculate it: http://codepad.org/cbdGB8wL and it gives me good results. The problem is my lecturer would prefer me to use the formula as attached , but I get stucked, how … |
| | Hello, As may be apparent from my previous posts, I am in a "If its worth doing, its worth overdoing" sort of competition with a friend of mine. Our goal is arbitrary precision integer arithmetic. I think I am close to getting the data storage working, but now I want … |
| | Ive actually managed to get DirectX 9 working with Direct X, however i am now getting odd error messages around a function. I can't see any syntax issues myself but thought i'd check to see if anyone can shed any light on it. `g_pd3dDevice->CreateVertexBuffer( 3 * sizeof(CUSTOMVERTEX) , 0, D3DFVF_CUSTOMVERTEX, … |
 | //Author: Frank R. Mendez //Title: Object Oriented Bubble Sort //Description: Accepts an int array element to sort using bubblesort in ascending order #include <iostream> using namespace std; class BubbleSort { public: void bubble(int arr[], int size); void driver(); void display(); int arr[50]; int array_size; int temp; }; void BubbleSort::driver() { … |
| | i am trying to create acalcultor using a c++ program that uses mode. would you please show me how to create a calcultor that uses the mode function using a switch a statement |
| | Hello everyone, I have a 2D array as follows: `double cornerPoints[4][3];` which is used to determine the four corners of a 2D bounding box of a curve. However, since I do not know how many curves are to be processed, I would like to dynamically allocate memory, knowing that the … |
 | This is the code which put an extra line to the std::string array. I am here trying to print last k lines of file. Any help is appreciated. #include <iostream> #include <fstream> #include <string> using namespace std; //file.exceptions(ifstream::eofbit | ifstream::failbit | ifstream::badbit); void print_last(unsigned k, string file_name) { string *data=new … |
| | #include <iostream> #include <string> using namespace std; class Point { int x; int y; public: Point(int seed = 0) : x(seed), y(seed) { cout << "Overloaded constructor called.\n"; } ~Point() { cout << "Destructor called.\n"; } int getX() { return x; } int getY() { return y; } }; ostream& … |
 | Im having difficulties in performing the frequency distribution of 6x6 matrix which was given..i solved it by the following way but it was wrong anyway because if i change any number in the matrix it will not calculate the number of times it occurs in the array.... need your kind … |
 | these is my problem. the user enter the password and the computer output "congratulation!" if the user guess the assigned password otherwise "try again!" how could i run these program. feedback a.s.a.p. thanks. |
 | class A { public: protected: int i; }; class B : public A { friend void f(A*, B*); void g(A*); }; void f(A* pa, B* pb) { // pa->i = 1; pb->i = 2; // int A::* point_i = &A::i; int A::* point_i2 = &B::i; } void B::g(A* pa) { … |
| | //Author: Frank R. Mendez //Title: Object Oriented Queue //Description: This is program uses double linked list to store data in the queue its functions are enqueu,dequeue and display queue. //Hope it can help you in you future projects. Good vibes to all programmers! #include <iostream> using namespace std; struct Node … |
| | // stringprint.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include "mpi.h" #include<stdio.h> #include<stdlib.h> int _tmain(int argc, char* argv[]) { MPI_Status status; int numtasks, rank, rc; char ch; rc = MPI_Init(&argc,&argv); if (rc != MPI_SUCCESS) { printf ("Error starting MPI program. Terminating.\n"); MPI_Abort(MPI_COMM_WORLD, rc); } MPI_Comm_size(MPI_COMM_WORLD,&numtasks); … |
| | Kambo company pays employee Gratuity on retirement that can be computed using the Formula Gratuity=(Salary*Fixed Rate*Number of Years Worked)+One month Salary. Formulate an algorithm that can be used to calculate the gratuity and write a c++ program that can be used for the computation.  |
| | I am almost done with my assignment but am having problems with the spacing when I echo the file. Any help please? this is what I have: #include <iostream> #include <fstream> #include <string> #include <iomanip> using namespace std; int main() { //Declare variables to manipulate data char reply; string name; … |
| | Hi, This question is related to the below. http://www.daniweb.com/software-development/cpp/threads/352685/error-c3861-menu-identifier-not-found I used that to solve my issue. What I would like to understand is why the function prototype is to be declared before the main function? In my textbook that I am following the function prototype wasn't there. I did as … |
| | I stumbled upon the fact that one can't bind a temporary variable to a reference unless it is a constant and found it to be indeed true in the given code. However, i am not able to find out the difference in my other code snippet where I didn't use … |
| | I have 2 processes (producer and consumer) sharing an int deque in shared memory, I have the producer process put 2 numbers in the deque and then it gets in a wait state losing its mutex lock. I then have the consumer process removing the numbers and printing them. It … |
 | How to Make a Program in Array that have 3 rows and 4 columns and the User Should Input the Data or Values  |
| | I use visual c++ compiler 2008 express edition, because express edition doesn't support resources is it possible to make a win32 dialog box in express edition, if so how might I create one? Thank you for reading |
 | Hello, I am having a few problems when trying to execute the a Makefile that will *hopefully* create a static library that I can use for future use. Here is my code below: #----------------------------------------------------------------------------- # Usage of make file #----------------------------------------------------------------------------- # Clean operation: # make -f MakeClient clean # # … |
 | Hi there, I'm just new to programming and C++ ... I have trouble with my code At first I am using "int" for variables but then I realize that i need a much larger range of numbers and also support for decimal operations... My First Code: #include <stdio.h> #include <conio.h> … |
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