dot operator

Question

obj.regVar=42;
in friend keyword lessons
what's that mean?
regVar is not a function, how they use dot operator ?

Answer 1

you can assign "functions and values " to your objects by dot operator, there is no limit .

Answer 2

Basically,
You can use the dot operator for a member variable or function of any struct or class in C++.
For example,
class Foo
{
public:
int test;
};

Foo bar; //We instantiate the class as object
bar.test = 10; //Set the value of "variable test in
//object bar of class Foo" to be 10

Answer 3

thanks a lot