What are constructors and destructors?

Question

what r constructors and destructors used for in cpp.... can anyone xplain with examples plz....thank u

Answer 1

***When an object is created, constructors are used for proper initialisation of object variables. There can be multiple constructors for class depending on type of arguments, Number of arguments.
***when the usage of object is terminated, destructors are called to free up the memory used by object.
***The name of the constructor should be same as class name and name of destrutor will be same as class name preceeded by symbol ~
***Constructor can be many types: default constructor, copy construtor, assignment constructor.
***Constructors and destructors do not have any return type(not even void)
*** Here is a small example
Class A
{
int a,b;
public:
A(){ a=10,b=20;} // default constructor
A(int x, int y) { a=x;b=y;} // parameter changed
};