наследование

What does "@Override" mean before declaring a method?

There is a constructor in the base class public Kons(int a, string b){} You need to make a constructor in the heir public ... c):base(a,b){} Writes that the non-static field b requires a reference to the object. You can't make b static. What to do?

#include <iostream> struct A { A() { std::cout << 'A'; } A(const A&) { std::cout << 'a'; } }; ... the program output ABAb And not what I expected ABab Why did the developers of the standard decide to set this behavior?

I'm trying to understand how these two elements differ. I read here and here, as well as the lecture I am studying. If I unde ... d move (int n, int m)? PS PS PS: Sorry for the large number of questions. I just would like to fully understand this topic)

Hey, Stack. Faced with such a problem that I can not correctly distribute the classes into separate ones .py files. According ... : # арккотангенс ... fourth.py class D(): # Вообще это класс для производной, но не знаю от чего его наследовать. ...

I want to implement the Vector class as an entity of a linear space, and then inherit the usual DoubleVector and Matrix from ... peration is not defined, so the code will drop. Question: is it possible to solve this problem without rewriting the methods?

Please explain why the subclass and superclass constructor is called when creating a superclass object. public class Main { ... "is Person"); } } public class Student extends Person{ Student(){ System.out.println("is Student"); } }

Why add the super() call to the child class constructor if the compiler does it automatically? I mean, in any case, the constructor of the parent class will be executed first, and only then the child class, so why write it manually?

Using a child class as a parent class An important aspect of polymorphism is the ability to use an object of a child cla ... the times I ask this question, and preferably an example, and a good article and a task on the topic of polymorphism. Thanks.

I'm studying multiple inheritance. I don't understand why in one case the init method of both parents is called, and in the o ... y one init is triggered, and in the other case all possible inits are triggered. Thank you in advance for your explanations.

I'm studying c++, I ran into a problem. There is an Animals class. It has two derived classes Cat and Dog. How to make an arr ... t;name = ""; } }; int main() { Animals anm[10]; anm[0]=Cat(); anm[1]=Dog(); std::cout<<anm[1].age; }

Hello everyone. I can't figure out what the hitch is. Task: You need to build a hierarchy of classes according to the inherit ... ерархии класса D4\n"; temp1.show_D4(); getch(); return 0; } Who can, help and write the correct code, very much help me out.

There are classes: class Monster{ //Родительский класс public void eat(){ System.out.println("Есть всё ... uting this program, we get the following result: But why, if you use the Objekt class as the parent class, nothing happens?

I want to implement approximately the following architecture: Explanation: Base - Something like a storage entity that sto ... .out.println(MixIn.get_0()); // Итоговое использование должно быть таким System.out.println(MixIn.get_1()); } }

Please tell me, what is the difference between black and white diamonds when inheriting a class in UML diagrams?

There is a parent class: class Indexcontent { var $indexcontenttpl; var $filename; function Gethtml($filename) { $indexc ... P.S. Removed underscores from the names of functions, classes, and variables - because the markup tries to recognize italics.

What's wrong with my code? I looked at different solutions, but I didn't understand. Missing argument, "name" from " Drone.Dr ... ine(VehicleId + " with " + Name + " has " + PowerScore + " and carrys weapon " + Weapon + " engine " + EngenePower); } }

I have a class system like this class C: def __init__(self): print('c') class A: def __init__(self): ... bled: C B A Do you really need to initialize the second parent class with your hands and call its constructor? Why is that?

To consolidate this topic, I decided to look at the guides/read articles and write the code function Animal(name, age) { th ... ve a constructor like Animal, but it is not completely clear what problems can be caused by the absence of this line of code.

I came across this picture: The picture shows that we have some kind of function(I understand the constructor, here I would ... ype. The question is difficult to formulate, because I do not understand what these 2 different prototypes are. Can you chew?