1,089 Topics
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| | The question asks: Write and compile a C++ program that simulates the arrivals of airplanes at Regina airport. An airplane is represented using a C++ struct. Each plane belongs to an airline, such as United, and records the city from which it is arriving, for example Chicago. The airport is …  |
| | I have a program that has the user input a resistance value, then the program checks to see if it is a valid resistance value, and then prints the min and max, based off a valid tolerance value. Here is my code: Resistor.h #ifndef Resistor_H #define Resistor_H #include <cmath> #include … |
| | class Sample1 { Sample1() {System.out.println("Sample1 const"); } void doStuff(){System.out.println("sample1 dostuff"); } } class Sample2 extends Sample1 { Sample2() {System.out.println("Sample2 const"); } } public class Sample3 extends Sample2 { Sample3() {System.out.println("Sample3 const"); } public static void main(String r[]) { new Sample3().go(); } void go() { super.doStuff(); } } The output is: … |
 | Hello, I want to know and understand how and when do we need to implement classes in our code, I have written a program in python just using functions but never feel the need of using classes, so I was thinking when we can create something without classes why do … |
| | There is a lot more that is supposed to go with this. For now, I'm just trying to implement a class that uses a vector. Class is called ItemList, it's the header file. Main creates the object and attempts to add to the vector. Compiler doesn't recognize "list" as a …  |
| | My Java is pretty rough. So far I've completed one class of Java all the way up to basic array functions. I've asked my Professor to explain it, but he talks with so much jargon. Could someone explain to me why this program spits out the "24" when I run … |
| | So I'm trying to right a code to output some simple data using classes. Everything works accept the retail price function. It's suppose to calculate and output the retail price but it only outputs 0 no matter what numbers I eneter. Can anyone give me some suggestions on how to …  |
| | I am trying to implement a function sameMonth from a class to compare two user entered months. My class is declared in a header file "Date.h": #include <iostream> using namespace std; class Date { private: string month; int day; int year; public: Date(); Date(string aMonth, int aDay, int aYear); void … |
| | Can anyone help me with this constructor problem? In main: instantiate one date object (date1) using the default constructor just to see that the constructor works, print the month, day, and year of date1 using the getters get input from the user and use the setters to set the values … |
 | this is my first attempt to implement OOP. IS this class ok?(in terms of structure) AND another Question: there are some folders in message application in Symbian phones and sometimes there are up to 1000 messages in each folders. I do itterate over all messages for gathering their info about … |
| | import java.io.*; public class Mac extends Laptop { public static void main(String r[]) { new Mac().crunch(); } //insert code here } class Laptop { void crunch() throws IOException { } } The question is simple. Insert a code that will make the program compile. Answers are: `void crunch()` or `void … |
| | int [] ia1 = {1,2,3}; int [][] ia2; Object o = ia1; ia2 = new int [3][3]; ia2[0] = (int[])o; ia2[0][0] = (int[])o; Answer is "Compilation fails in last line" Explanation: Arrays are objects, and that each array dimension is a separate type. So, for instance, ia2 is of type …  |
| | hey i have a question how do i get my funktion to work in the design.cs? namespace Visma_projekt { public class BlackJack { public string[] Cards = new string[51]; public void SkapaKort() { System.Console.WriteLine("Ehhhh"); } } } i want to call the funktion from this code visma.cs into the form1 … |
| | Hello, Please take a look at the below code - #include<iostream> #include<ctime> // for the time() function #include<cstdlib> // for the srand() and rand() functions using namespace std; int compInput; int userInput; int die1 = 0; int die2 = 0; int Dice () { // set the seed srand(time(0)); // … |
| | This seems like a pretty basic question, but I'm still learning Java and all the nuances of OOP. I have several classes in my program and they all need access to the same ArrayList (the one with all the data in it.) What's the best way to share that list? … |
| | import java.util.*; class SampleA { } class SampleB extends SampleA{ } class SampleC extends SampleA{ } class VectorDemo { public static void main(String r[]) { Vector<SampleA> v = new Vector<SampleA>(); v.add(new SampleB()); v.add(new SampleC()); SampleC rect = v.get(2); } } The output says "Incompatible types. Found SampleA, required SampleC. SampleC … |
 | My initial thoughts on the default constructor are that it was called automatically. From what I can see, it seems that this is so but a constructor called automatically doesn't initialize int or char variables for exampe, to Zero as I originally thought. It appears that they initialize the variable … |
| | I need a little bit of help here. I'm new to C++ Classes. There are some errors which I do not know how to troubleshoot. The error of "Declaration terminated incorrectly" for line 6 and 7. Multiple errors of "Type name expected". Why is that? Multiple errors of "Declaration missing … |
 | Hi. I am a very beginner at Java. I am taking an online course on Java and I'm stuck on an assignment. Anyone who is good with Java, can you please take a look at my code? This assignment was due yesterday but I couldn't finish it. It is very …  |
| | Do you need to implement a class in order for an object to access the class's functions/methods? When should you implement a class? When shouldn't you?  |
| | Could some one point out what's wrong with the classes of this program? #include <iostream> using namespace std; class box { private: int height; int length; int width; public: box();//constructor int surface_area(); int volume(); void set_dim(int ,int, int); }; //implementation box::box(){ int height; int width; int length;} box::int surface_area(){ int … |
 | I have done alot of OOP for long now (with C++/Java/Python etc) but world of JS is confusing. I wanted to try it by writting Ajax library (I know there are libs but this for JS OOP familiarization) and found confusing. No class keyword et cetera. What is happening? Am …  |
| | OK I've got another interview! Thanks to pritaes for the links etc. Never thought I might be doing a programming job but hey, it's a laugh I guess. I have a few questions I may want to ask about OOP in version 5, but also codeigniter and joomola... So learning …  |
 | The aim of this tutorial is to save burgeoning self taught developers some of the early pitfalls that lurk on the road to programming enlightenment. It will attempt to do this by distilling the last 50 years of software engineering philosophy into a relatively short single tutorial, applying the concepts … |
 | Building an application or site in PHP that uses the eBay API can at first be quite a daunting task, just trying to get your head around that vast selection of API's available to the budding developer for eBay can take a while in its self before you even write … |
| | Ok, so I finally was able to convert my framework to the PSR-0 standards, but now I am getting errors in the sample application that I have not been getting before. I am not sure why, so I need a fresh pair of eyes. Any help is greatly appreciated. The … |
| | Lets say I have a class A and I also have classes B and C that inherit from class A class A { virtual void foo()=0; //stuff } class B : class A { void foo(); //more specific stuff } class C : class A { void foo(); //more specific … |
| | Hello, I'm trying to implement a grid from Ext Js 4. I have index.php, which is the main page that has the main html (<html><head></head><body></body></html>) and a div inside the body. everything on my application is displayed inside that 1 div. in other words I'm using OOP PHP and Ajax. … |
| | I wanted to write a simple program that uses classes but I've been running into errors. Anyone have a clue as to what is wrong with my code because I can't seem to figure it out. #include <iostream> #include <iomanip> #include <cmath> using namespace std; class cone{ private: double radius; …  |
| | HI everybody, i recently start learning java as my oop language, beside this i have also made up my mind for web development, but i am confused that whether after learning java i should go for web ( html,css,jscript,php,mysql) for choosing it as my carrer or i should learn new …  |
| | Hey guys. Im in my first week of class for Java OOP. This is what my first assignment looks like **1. Ask from the user: how many students take CompSci in summer, and store that number in a variable.** **2. Ask the user to input the name and mark of … |
 | As the title suggests, I created a base class named **member** which I want to use to get some basic information, but for some reason, I cannot seem to access those methods/values from the child class named **user_send_message** Here is the complete code that I have made so far -- … |
| | Hello! I am very new to Java and programming theory and desperately trying to improve my knowledge. This is the first program I've made without help and really would appreciate some feedback. I know there must be 1,000,000 better ways to do what I did. Notes: - Want to Move … |
| | some people say that multiple inheritance in java is not needed because we have interfaces or that using singular inheritance can bring the same results as using a multiple inheritance. But that is not the case. Lets take a look at the example I call “The Workbench Example” say we … |
| | I am having trouble with this assignment, especially the input file and how to get the data into an array: You will design a set of classes for storing student information, along with a main program that will read student information from a file, store the data, compute final grades, … |
| | currently I'm rewriting old euler solutions into classes so i can store them in a library. I wrote a program that digitizes a number so it can check to see if it a pallindrome, The base class digitize dynamically allocates memory for the size of a number and stores each …  |
 | Hi, I got a problem with class. I've created 3 classes: * identifiantsClass.php * connectInfosClass.php * sqlClass.php In my third class, i always have the message: "error to connect" even if my database's name is good. Please help me... * identifiantsClass.php class Identifiants{ protected $serveur=null; protected $host=null; protected $mdp=null; protected …  |
| | Hello! I am very new to Java and programming theory and desperately trying to improve my knowledge. This is the first program I've made without help and really would appreciate some feedback. I know there must be 1,000,000 better ways to do what I did. Notes: - I want to … |
| | Hello to everyone! This is my first post here, I hope you can help me. I'm making a class work in python and I'm a little lost: I have to use classes to represent monomials and polynomials, and the classes should contain methods to add, substract, multiply and divide them. …  |
| | Hi, Code below is just to print a message. Nothing more. Question is: Whether we have the line `return $this->myname;` or not, it works fine but why some people still use `return` in such cases? Is it just a matter of taste or I'm missing something about OOP? Example below … |
| | Hi all, FIrst I have to say my experiences with C++ are very low. But since we're given an assignment to develop a simple game in C++ now I have to try it out. But I have the basic idea on OOP and programming. So friends where should I start. …  |
| | i want to know that what is php frame work and how it use tell me benefits,uses and disadvantages of php frame and also tell mee benefits,uses and disadvantages of oop in php |
| | Hi Guys, I have been browsing this site for a number of years now for articles, advice and code snippets, with great interest in the expertise displayed, never actually posting any questions until now. I have been coding for a number of years now using procedural code, with breif interludes …  |
| | Design a CPU Timer class (you may name it CPUTimer). This class should allow the user to start timer, stop timer, compute delta time and print the lapsed CPU time of any block of code in a program. #pragma once #include <iostream> #include <cmath> #include <ctime> #ifndef CPUTimer_h #define CPUTimer_h … |
| | Hi there guys how do you know if a program is coded in an object-oriented manner? I just wanted to know if the program I have downloaded is an oop program or not. please help... |
| | I would like to take string argument for class BalancedTrinary intializer, but the string type of argument is processed before it enters the init function. I guess I must override any class method which deals with those for int/long? def val(number_sequence, base): """ produce integer value of number_sequence as base …  |
| | hello i am creating a tictictoe game , however i cannot get the program to check if the player has won or not . and produce a you have won message #include<iostream> #include"110ct.h" using namespace std; class TICTACTOE { CursorController*crs; ColourController*cl; int xplayer ; int oplayer; colour Cs; public: void … |
| | I am trying to get this class put together but I've always had trouble figuring out constructors. I don't know what to set the data fields in Customer(int customerID, int checkoutTime, int arrivalTime){} // DO NOT ADD NEW METHODS OR DATA FIELDS! class Customer { private int customerID; private int … |
| | This code is supposed to respond on (w,s,a,d and q) key press..... On "w" the character ( actually the $ sign ) should move up similarly s =down , a is for left and d to move right.......... and 'q' is to quit!! Sometimes on a very few (beginning key … |
| | I am having trouble with this part of my program assignment. I have created and compiled the three separate implementation files that design the three classes, they each have a default constructor, overloaded constructor, and a display function. //************************************************************************************************************ "When your program is working correctly, define an array of pointers … |
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