462 Topics
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 | I am having some trouble on inheritance in java. I am just testing how it works. I have a file that produces a random number in a folder called number. I have a file that calls the RandomNumber code that is in the main folder. I am wondering how I … |
| | I have a situation like this... I have four different tables namely btech_ece, btech_cse, btech_it, btech_eee all these tables have the same columns. Its just that the name differs and everything else is same. Their columns are:- Id Year Semister Section Period SubjectCode Date Status now i have four different … |
| | About a year ago, I built a simple ray tracer in Java, and now I'm trying to port it to c++, but I can't figure out how to get a couple of my classes to work together. It should be fairly strait forward, but its not working. Here is a …  |
| | Hello! Considering the competition on "classes"-related keywords is it realistic to create good SEO - first page on Google - and if so how long will it take? |
| | Hello everyone. I've been trying to implement a linked list in C++. I found this implementation on the web, where they created a struct for the list's nodes. When trying to add a new node to the list, I get this error: [B]List.C: In member function `bool Linked::addNode(Point)': List.C:23: error: …  |
| | I was just a bit confused about something sorry. If you have two classes, Ribbon1 and ThisAddIN below. How can I call Example()? - All are in the same namespace.. [CODE] public partial class Ribbon1 { private void button1_Click_1(object sender, RibbonControlEventArgs e) { //Call Example() from ThisAddIn Class Example(); } … |
 | Ok it's all about to create 4 class Class a , class b derived from a and c derived from b and test class Speed is an instance variable in class b and c. The method are : Start() -a method of all class to print the message"hee" override the … |
| | hi. i need help for a problem. i have an array of double values in the main method. i am trying to create an object and pass the array to a different class using an overloaded constructor. i am having trouble with the syntax. please help, i need to use … |
| | Hi, I have a homework assignment that I just cannot figure out. I would be grateful of any help. The assignment is: Create a program which: Implements a class called Queue: The class should contain an array of maxQ integers. There should be two constructors: One that takes no argument … |
| | Hi, I have a project to do for a C++ class that asks us to use a class termed "queue" to store some values (20/100/user defined) and allow the user to add/remove values. I'm sure it seems really basic, but I just can't get my code to display the class. …  |
| | Please dont tell me to "google" it obviously I'v tried everything and this is my last resort. k thanks :) ok so I have to set a value to be restricted in the constructor ___________ Modify the constructor and set methods of the Shape class to verify the values of … |
| | Hi, i have this assignment to do and i dont really know what i have to do could someone tell me what i have to do in simpler language thanks Here is the assignment: Create a program which: Implements a class called Queue: The class should contain an array of … |
| | Hi, I've been working on this for two days. I need to pass an arraylist to another class. It gets the information, and will print out the menu, until the program goes back to the initial class, then the list empties. I don't get it, and I'm so confused. [CODE]public … |
| | I'm working on a really basic text editor to save and open txt files. On my text area setLineWrap, it's giving me a "misplaced constructs" and "delete token" for the period and (true) For why? [CODE]/**Matthew Schrum *11/18/2010 */ import java.awt.*; import javax.swing.*; import javax.swing.border.*; import java.awt.event.*; import java.io.File; import … |
| | I have created a JFrame contaning a JTabbedPane. What I am trying to accomplish is the changing of tabs within my 'addCustomer()' class via an ActionListener. What I was trying was to call the method 'setTab(int c)' located in my 'BoatLog()' class, from my 'addCustomer()' class to set the index … |
| | Hi there, This is just going to be a quick question. Also just note that I am i some "remote location" so I cant even show you my code. But what I want to know is this: Say you have a package called "myPackage" and inside that you have 2 …  |
| | Hello. I have a problem with one part of my homework. I'm not exactly sure how to say this in English. I want the constructor to build an object and assign string values to attribute1 and attribute2. I'm only posting the relevant part of my code. My class can be …  |
| | this is the summary of program and i only include the addition of matrices my problem would be the variables in Addition class cannot read variables from the other class i need to know how to fix that the error would be : The name 'a' does not exist in …  |
| | Hey guys! This is my very first post on this website. Anyways, I just started learning Python, and am reading an ebook, called "A Byte Of Python". So at the end, it says to create an address book application. In my application, it basically just creates a text file with …  |
 | Hi guys. I am hoping for a little help with this. I am pretty new to programming and just can't seem to get things right yet. Here is my code. It returns like 40 errors. Way messed up eh? [CODE]#include <iostream> #include <string> using namespace std; class Date { public: … |
 | This code is giving minimal change from real Python class to JavaMonster with every method having setter and getter not following the PEP8 naming but capitalizedWordsFormat. When instrunctor turns his head or if you put the code in your library, you can simply remove the setter/getter lines. |
| | Hey guys I have a study guide that I need some assistance with if possible. it is basically definitions. Classes={} Assume these statements are working with classes and objects: Attribute?property Instance Encapsulation Also I need to tell what this code does. I am not good with classes at all please …  |
| | Hi there. I am currently trying to get my head around using classes across two files. I currently have a super class and a sub class stored in a file and the main function in another. When I try and pass arguments to the class they work fine if the … |
| | Hi All, this is my first query after joining the forum. I would like to know following points: 1. If I can create threads in constructor 2. If yes, can I use the same object / instance (which created this thread)in this thread to call other methods of the class … |
| | Hi all, So I'm working on this program to use a circular doubly linked list to implement a queue class. It went fairly well, but I'm stuck on the copy constructor, which causes runtime errors whenever I try to test it. Nonetheless, I really don't see what I am doing …  |
| | Hello all, So I'm working on this simple program with a Queue class template that is publicly derived from the abstract base class CharQueue. The only problem is that I keep getting hit with the error "expected class name before '{' token". The reason I don't understand this is that … |
| | The point of the program I am making is to have a pure abstract base class called BasicShape and have 2 child classes, Circle and Rectangle. I have the program written but with one unresolved error. [B]Main.cpp file[/B] [CODE]#include "Pure.h" #include <iostream> using namespace std; int main() { Circle pizza(2,2,10); … |
 | [B]Specifications (minimum):[/B] The CDROM class contains the following, private, data members: string Name; // The Name of the CDROM string CDType; // The Type of CDROM float Cost; // The Cost of the CDROM [I]The ONLY recognized (i.e., legal) CDROM types are, “Game”, “Word”, “Compiler”, “Spreadsheet”, “Dbase”, and “Presentation” (AND, … |
| | I am reading from a file. After i tokenize and assign each value to a string field i call the constructor and initialize the object. next i want to add them to an array. I have done this with a vector and all i do is [CODE=java]ObjectVec.add(obj1);[/CODE] Mind you this … |
| | //This is the error that i have Exception in thread "main" java.lang.NullPointerException //at CardTest.main(CardTest.java:16) /** * @(#)CardTest.java * * * @Robert Coughlin * @version 1.00 2010/10/15 */ //this is the main public class CardTest { public static void main(String [] args) { Card [] randomCard=new Card[20]; for(int i= 0; i<20; …  |
 | I am trying to start this java program using the requirements below, but I have no idea where to start. Just so you guys know, I am just starting out in this language. i have experience in Javascript programming, but this is completely different. I am used to Java programs … |
| | [CODE]Partial Class system.windows.forms.control Overridable Sub ioEnabled(ByVal mode As ModeValues) End Class[/CODE] ... gives me a zillion errors. Is there a proper way to "expand" a system class? |
| | Basically, its all to do with the inventory system, all the other reams of code work fine, thank God! with the inventory, the idea is that each character can hold 5 items, so an array, but the array needs to hold the itemID and the itemName therefore an array wont …  |
| | This is a friend operator overload function that used addition. It adds two mix fraction by reducing them to simplest form the adding and converting them back to a mixed number [CODE]Mixed operator+(const Mixed& f1, const Mixed& f2) { int newnum, newnum2, gcd, tmpNumerator2, tmpNumerator, tmpInteger, tmpInteger2; Mixed r; tmpNumerator … |
| | So I've been working on this program for a while, I'm finally finish but I have two error that I can not understand why. My first error is when I am declaring the header f [CODE] //------------------- Mixed.cpp -------------- #include <iostream> #include "mixed.h" using namespace std;[/CODE]ile> it keep sending me … |
| | VB2008 won't let me drag my lblBase class from the toolbox onto a form in design mode. Why? Is there a way around this? [CODE]Public Class lblBase Inherits System.Windows.Forms.Label 'Public Sub New() 'MyBase.new() ' Me.BackColor = Me.Parent.BackColor 'End Sub End Clas[/CODE] |
| | Is there any way to inline just some selective calls to a particular function not all of them? by function I also mean class operators like assignment operator, constructors like copy constructor. The only form I know is declaring function as such at beginning and that's supposed to effect all …  |
| | I'm having trouble figuring out a few different methods that I'm putting into a constructor. Any chance for advice? I'm having trouble with the last 3 near the bottom. I want to compare two name variable to each other to see if they are the same regardless of case, then … |
| | Hallo! I've been having some trouble getting a save/load function to work properly. I'm trying to save object and their properties to a file in binary using fstream. And then being able to load the object from the binary file the next time im running my project. Quick breakdown: I … |
| | Hi I want to build some objects that have a little difference between them. But i wonder how would i do it - 1. build a class with some variables and build objects out of him, or - 2.build class for each object, with the functions dedicated to this 'only …  |
 | Is it possible to pass arrays into a function and/or return an array from a function? I think it's possible but I don't really know how to go about it. lets say I have a function that returns a bunch of field from a database ex: [CODE]function a($sql){ $result = … |
| | Hello It's me again, some might have seen a similar string, and it is probably because it is the same, but with a different problem. The following shows a program which uses a function that converts Fahrenheit into Celsius. The problem is that a person can enter any value they …  |
| | Hi all, I've finally gotten a handle on object-oriented programming (it took ages), and I really like it. But I'm still struggling with conceptualizing some things. For example, if I want to make a form using objects, do I make a Form class with a method like startFORM($name_of_action_page, $method), then … |
| | This is my first post here on Daniweb and I intend to do things right. I actually did read the "READ THIS FIRST" thread and instead of posting 500 lines of code I whipped up a test program I aptly titled test.cpp First I will walk you through my problem. … |
 | Just started learning java and i'm having a little trouble with my compiling im supposed to give a screen shots of my outputs if it works but vista is blocking it (asks for permission and then just hangs) ive included the questions just in case its being bleh but it … |
| | I have a design question which I have not been able to find a satisfactory answer for by searching. Essentially, I have a class - Base - that contains a vector of pointers to another class - Node. However, I would like to be able extend both the Base and … |
 | copy constructors ?? what are they ? |
| | I got stuck at this error: [B]cannot find symbol symbol: variable BankAddress location: class Bank bankAddress = BankAddress;[/B] [COLOR="Red"]<------pointing at BankAddress;[/COLOR] I'm trying to instantiate an object of Address, calling the constructor of the Address class to create an object of Address. I'll post both classes, Bank and Address [B]Address … |
| | Here's the prompt guys: Assignment #4 will be the construction of 2 new classes and a driver program (the class containing a main method). [B]Address class[/B] The Address class describes cpu of a bank. It has following attributes: Attribute name Attribute type Description city String the city of the bank … |
| | I'm writing two classes for the main program code. I'm stuck trying to do figure out how to instantiate an object of the class Address: [B]Address class:[/B] [CODE]public class Address { private String city; private String state; public Address() { city = "?"; state = "?"; } public Address(String aCity, … |
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