StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
15427699
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-03-15T08:25:24.030
FavoriteCount
0
LastActivityDate
2013-03-15T10:48:22.180
LastEditDate
2013-03-15T10:48:22.180
LastEditorUserId
1941054
OwnerUserId
1941054
ParentId
15427516
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
Your description matches perfectly with the case of an abstract class. Declare your virtual function as: <pre><code> virtual void VirtualFunction () = 0; </code></pre> This means that you are not implementing the function in this class. As a result, the class becomes abstract. That is, no bare objects of this class can be instantiated. Also, you should provide a virtual destructor. Update: Some clarifications... The language allows you to redefine a non-virtual function. Though, the wrong version might be called in some cases: <pre><code>derived D; // rB is a reference to base class but it base & rB=D; // points to an object of the derived class rB.NonVirtualFunction (); // The base-class version is called </code></pre> For this reason, redefining a non-virtual function is strongly discouraged nowadays. See Scott Meyers' "Effective C++, Third Edition: 55 Specific Ways to Improve Your Programs and Designs", item 36: "Never redefine an inherited non-virtual function." See also item 7: "Declare destructors virtual in polymorphic base classes". An example: <pre><code>base * pB = new derived; delete pB; // If base's destructor is not virtual, // ~derived() will not be called. </code></pre> In case you wonder why isn't everything virtual by default, the reason is that calling a virtual function is slightly slower than calling a non-virtual one. Oh, and objects of classes with virtual functions occupy a few more bytes each.
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POConfused about non pure virtual classes in C++, what are they for?
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. UScomocomocomocomo
UserOwnerUserId
1. UScomocomocomocomo
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POConfused about non pure virtual classes in C++, what are they for?
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
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.