References and Pointers are Same in C++?
.
.
.
Ans :-
No, they are not.It is important to realize that references and pointers are quite different.
S.No | Pointers | References |
1 | creating a pointer creates a new object. | creating a reference does not create a new object; it merely creates an alternative name for an existing object. |
2 | A pointer should be thought of as a separate object with its own distinct set of operations (*p, p->blah, and so on). | the operations and semantics for the reference are defined by the referent; references do not have operations of their own. |
In the following example, notice that assigning 0 to the reference j is very different than assigning 0 to the pointer p (the 0 pointer is the same as the NULL pointer; see FAQ 1.09).
int main()
{
int i = 5;
int& j = i; <-- 1
int* p = &i; <-- 2
j = 0; <-- 3
p = 0; <-- 4
}
(1) j is an alias for i
(2) p is a new object, not an alias
(3) Changes i
(4) Changes p; does not affect i
0 Comments:
Post a Comment
<< Home