[constructor] Forum Topics

I wonder why they use private constructors.when I was navigating java documentation I found alot of classes with private constructor.Would you tell me what are the benefits of writting them.

Hi, i am doing a multiple-file project and i come across a difficult obstacles. I want your help, DaniWeb readers on this problem, which i find very strange: [CODE] #include "stdafx.h"//i have included vector header here #include "globals.h" #include "functions.h" using namespace std; #ifndef CPIECE #define CPIECE class CPiece { …

Hi!! my application have 2 frames including tabel 1,tabel 2 when run time i insert values though textfileds to tabel 1 ,after inserting 5 or more then i click next button then display other frame with tabel 2 and tabel 2 must auto filled. my problm is last row(i already …

Suppose the xMethod() is invoked in the following constructor in a class, xMethod() is _________ in the class. public MyClass() { xMethod(); } A. a static method B. an instance method C. a static method or an instance method what is the answer a or b or c

I've tried searching for articles that relate to this issue, but all I keep finding are articles about people who don't know how to define constructors/can't call the parent constructor/etc and I think this will cut straight to the chase. The problem code is as follows: [CODE] #include <stdio.h> class …

Ok So Im writing a app which would pick the 'cheapest' plan for a consumer. While writing this I came across something puzzling to me. Why is it starting after the default constructor, the first CellPlan has three arguments passed too it and then the next one two and then …

Hi everyone! When i compile my small piece of code it gives me the error [COLOR="Red"]C2512 : No appropriate default constructor available[/COLOR] this is my definition of class person: [CODE] // Person.h // A class defining a person #pragma once #include <iostream> #include <string> #include <functional> using std::cout; using std::endl; …

Ok So I have to create a Date Class that will allow me to return the current day with data members of month , day, and year this is what I have for from my Main() class: [CODE]using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace DateApp2 { class DateApp …

Hello all, im doing this problem which will allow a store to return a invoice, I have two classes and I guess I am at the very end and need help fixing some things so I can finally have the program execute: Class1: "Invoice": [CODE]using System; using System.Collections.Generic; using System.Linq; …

I am currently creating a queue ADT for one of my classes in college. We are using a linux ssh server for compiling our programs, but i am writing the code in windows. When i compile i get no errors, but when i run it goes fine until it hits …

Hello, I have a class Pdisk [CODE] class Pdisk { public : Pdisk(string diskname, int numberofblocks, int blocksize); private : string diskname; int numberofblocks; int blocksize; }; [/CODE] Now I want to make a class filesys which can access an object of class Pdisk. I am not sure how to …

Getting some errors at least this time I know why..seems like I am not declaring the methods inside my classes I tried rearranging the method and then inserting all my code into a class but Im still getting all those errors in the bottom. If you guys can tell me …

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 …

I am having an error with my constructor, why is that? :| [CODE]public class Name{ private String firstName; private String middleName; private String lastName; public Name(){ this( "null" , "null" , "null"); } public Name(String first){ this(first," "," "); } public Name(String middle){ this(" ",middle," "); } public Name(String fName …

Hey Guys, I'm working on a C++ program for school. Basically the Program inputs a file of points and outputs an svg file that contains the Graph with the least number of edges. We need to implement this with the Kruskal and Prim algorithm, and the algorithm needs to be …

What's wrong with my code? Why can't I output the "hahahaha" string from public constructor1?? help me please. [CODE]using System; namespace hahahahahahahahaha { class Program { public static void Main(string[] args) { constructor1 obj = new constructor1(); } } public class constructor1 { public constructor1(); { Console.WriteLine("hahahaha"); } } }[/CODE]

I just watched this tutorial: [url]http://www.youtube.com/watch?v=NTip15BHVZc[/url] and tried it myself, but I could not get it to work, I get these errors: [CODE]||=== 15. Placing classes in separate files, Debug ===| C:\Program Files (x86)\CodeBlocks\programs\tutorials\15. Placing classes in separate files\src\testClassFile.cpp|1|error: testClassFile.h: No such file or directory| C:\Program Files (x86)\CodeBlocks\programs\tutorials\15. Placing classes …

Hi, I was wondering whether it is possible to use a parent class' properties without calling its constructor. In the following example: [CODE]<?php class Shop { public $location; public function __construct($location = ''){ if(!empty($location)){ $this->location = $location; } else { $this->location = 'a place far far away'; } $this->location .= …

Hi everyone! I am trying for the first time to write "proper" object oriented c++ (ANSI) code. Up until now everything was made easy to me using visual studio and working with mfc or .net which both handle a lot of the "dirty" stuff... To the point : I want …

So i haven't figured out what the point of constructors are i am just learning C++ and am seriously having trouble with it, i do not get why...well i kind of get default constructors because it initializes the variables but what about a constructor with arguments and the member function

[COLOR="Red"][B]//This is the main file[/B][/COLOR] [CODE]#include<iostream> #include<fstream> #include<string> #include "Books.h" #include"account.h" using namespace std; int main() { cout << "\tWelcome\t" <<endl; cout << "1-Login" <<endl; cout << "2-Register" <<endl; cout << "3-exit" <<endl; cout << "Please enter a choice: "; cin >> choice; switch (choice){ case 1: system ("cls"); cout …

I am learning c++ now and have encountered a problem in trying to create single digit addition, multiplication and subtraction math questions. The numbers used in the questions are randomly generated from 1 to 9 and when I try to print the answer for the corresponding question, I get a …

Here's the scenario: I am coding a program that will display data from a database in a variety of fields. Some of the fields need to be read-only. Should have been simple just to set all those controls to read-only, except some of them are checkboxes, radio buttons and date …

Hello.. I'm new with java and have some problem with my assignment. I want to write a class named phoneBookEntry that has field for a person name and phone number. The class should have a constructor and appropriate accessor and mutator method. Then, write a main class that create five …

This may be a simple fix, but I have a class for a program that contains some member functions that manipulate a vector. The vector is a private member variable, and is filled from an array using a constructor. When I try to access the member functions to manipulate the …

When writing a program that uses separate compilation (I have a header file, a .cpp file that declares all the member functions of the class in thee .h file, and an application file). I used a constructor to pass the contents of a dynamic array to a vector, but it …

Okay, we had an assignment in computer class that I have been working on for awhile but what I've got so far isn't working. It seems that it may be a compiler issue, but since I can't get to a linux compiler (what the program will be evaluated on), and …

I have an assignment where I have been asked to ask the user for input. What I am trying to figure out is if there is anyway to call and use methods of another class whose constructor requires parameters without passing them from the main class that will be calling …

Hi Folks, The page on which my userscript will run has a namespace, the namespace defines a constructor function. I would like to create an object using the same constructor and use methods of the object in my userscript. So far I have been unsuccessful. Here's what I am trying …

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 …