Constructor & Destructors

Question

can anyone please help me out

Answer 1

//C++ example
class Cat {
int age;
int weight;
Cat (int a, int w) {
//this is constructor
age = a ;
weight = w;
}
~Cat() {
// this is destructor;
cout << “delete an instance” ;
}
}

Cat ob = new Cat(3, 25);

P.S. new Cat calls Constructor and passing 2 arguments to him like any other functions

Answer 2

simply you can think of constructor &destructors like special functions (piece of code ) than runs when an object of that class is created & destoryed respectivly

Answer 3

Thank you for your code.. It helpd me

Answer 4

in c++ constructors and destructors have the same name as class and haven’t return type, there is ~ symbol before destructor

Answer 5

okay

Answer 6

can you please teach me with an example for both. it will be helpful for me

Answer 7

thanks buddy

Answer 8

yea, i have learn class and objects in cpp but constructors and destructors are daunting me

Answer 9

does constructor always has the same name as the class?

Answer 10

no, it is in c++ , it’s about my c++ example.

Answer 11

for example in python it calls __init__

Answer 12

constructors,destructors are like special functions.
constructors get called when an object is created,
destructors get called when an object is destroyed.

Answer 13

thank you Ashraf Al_Absi

Answer 14

Okey

Answer 15

Working :
Constructor is a special member function whose task is to initialise an object of it's class.

&

Destructor is a special member function whose task is to destroy the object created by constructor.

Answer 16

well they exist in several languages..
in js
class Obj{
constructor(){
alert("hi");}
}
man=new Obj(); //i created an object "man" from class Obj here so the constructor is called then the code alerts "hi" .
As i said they exist in several languages and i dont know if this js examole is helpful.
desteuctors are called by default in js so no need declaring them

Answer 17

I don't understand very well

Answer 18

if you want to understand constructors and destructors you might need to learn classes and objects first