Constructor & destructor

The constructor of a class is a special member function of a class , It will be every time When a new object of a class is created .
The name of the constructor and the name of the class are Exactly the same Of , And no type is returned , And will not return void. Constructors can be used to set initial values for certain member variables .
The destructor of a class is a special member function of a class , It will be every time Execute when deleting the created object .
The name of the destructor and the name of the class are Exactly the same Of , Just add a word in front of it ** The waves, （~）** As a prefix , It doesn't return any value , It can't take any parameters . Destructors help in jumping out of programs （ For example, closing files 、 Free up memory, etc ） Release resources before .