What is the use of const here

Question

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int salary() const { return mySalary; }

as far as I understand const for this pointer, but I'm not sure. Can someone tell me that const is used here?

Answer 1

It looks like you have the right idea, in C ++ const by the method of the object means that the method cannot change the object.

For example, this will not be allowed:

class Animal {
   int _state = 0;

   void changeState() const { 
     _state = 1;
   }
}

Answer 2

When a function is marked const, it can be called in the const pointer / link of this class. Essentially, he says. This function does not change the state of the class .

Answer 3

const. , - const. :

const foo bar;
bar.m();

, m const, .

Answer 4

, const; - this .

Answer 5

, () . IE, const.

Answer 6

- const. , .

: http://www.fredosaurus.com/notes-cpp/oop-memberfuncs/constmemberfuncs.html

Answer 7

A const after a class function means that this function will not change any member objects of this class. Only one exception when a member variable is marked Mutable.