What does" ->" mean here?

Question

b->fun()

Answer 1

You're basically accessing function fun() using pointer b.

b->fun()

is the same as

(*b).fun()

Answer 2

it means: call function "fun()" from object "b"

Answer 3

b is the pointer object. hence it syntactically means member function fun from object b

Answer 4

مرحبا يا حسان