c++로 짜여진 코드에서 흔히 보는 세 연산자 "::" , "->", "." 의 차이
세 연산자 모두 멤버 함수나 변수에 접근하기 위해 사용된다.
그 차이는 접근하는 방법에 있다.
https://stackoverflow.com/questions/11902791/what-is-the-difference-between-and-in-c
(1) Dot operator is used in direct member selection scenarios.
c++로 짜여진 코드에서 흔히 보는 세 연산자 "::" , "->", "." 의 차이
세 연산자 모두 멤버 함수나 변수에 접근하기 위해 사용된다.
그 차이는 접근하는 방법에 있다.
https://stackoverflow.com/questions/11902791/what-is-the-difference-between-and-in-c
(1) Dot operator is used in direct member selection scenarios.
print(a.b)
Here, we are accessing b
, which is a direct member of an object a
. So, primarily, a
is an object and b
is a member (function/ variable etc) of a
.
즉 여기서 a 는 object
(2) Arrow operator is used in indirect member selection scenarios.
print(a->b)
Here, we are accessing b
which is a member of the object, that is pointed to by a
. It is shorthand of (*a).b
and so here, a
is primarily a pointer to an object and b
is a member of that object.
(3) Double Colon (Scope) operator is used in namespace related direct member selection scenarios.
print(a::b)
Here, we are accessing b
which is a member of the class/namespace a
.So, primarily, a
is a class/namespace and b
is a member (function/ variable etc) of a
.
즉, 이 경우 a 는 class/namespace.
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