StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
3834149
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2010-09-30T19:33:46.663
FavoriteCount
0
LastActivityDate
2010-09-30T19:33:46.663
LastEditDate
LastEditorUserId
0
OwnerUserId
241536
ParentId
3834067
PostTypeId
2
Score
4
ViewCount
0
LastEditorDisplayName
text
Body
With: <pre><code>addNode( node *&head, int value) </code></pre> ...the type of <code>head</code> is "reference to pointer-to-node". With: <pre><code>addNode(node **head, int value) </code></pre> ... the type is "pointer-to-pointer-to-node". A pointer and a reference are not the same thing. A simple way to think of a reference is as a dereferenced pointer. You would need different syntax to call both versions: <pre><code>node* my_node = 0; addNode(my_node, 0); // syntax for first version addNode(&my_node, 0); // syntax for 2nd version </code></pre> There are semantic differences as well. When you pass a pointer, you can pass NULL. When you pass a reference, you can't. This being a function that takes a ref-to-ptr confuses the matter a little, so let's change the problem a bit: <pre><code>void make_string(string& str_ref) { str_ref = "my str"; } void make_string_again(string* str_ptr) { *str_ptr = "my other string"; } </code></pre> These two finctions do the same thing but one takes a <code>string</code> reference while the other takes a <code>string</code> pointer. If you were to do this: <pre><code>string str; make_string(str); // OK make_string_again(&str); // OK - &str is a pointer to a real string make_string_again(0); // Not OK - compiles but will crash when function dereferences the null pointer </code></pre> You can see it becomes difficult (but not impossible) to call <code>make_string</code> with a null pointer. This could help you to implement better functions in the case where you expect that <code>make_string</code> will never be called with an invalid object.
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POC++ difference between ** and *& in parameter passing
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USJohn Dibling
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.