StackOverflow2013

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plurals

PO
primarykey
Id
7555960
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
8
CommunityOwnedDate
CreationDate
2011-09-26T13:38:50.780
FavoriteCount
0
LastActivityDate
2011-09-26T14:50:54.270
LastEditDate
2011-09-26T14:50:54.270
LastEditorUserId
241536
OwnerUserId
241536
ParentId
7555820
PostTypeId
2
Score
3
ViewCount
0
LastEditorDisplayName
text
Body
You don't have a <code>vector</code> of strings -- you have a <code>vector</code> of pointer-to-char. NULL is a perfectly valid pointer-to-char which happens to not point to anything, so it is stored in the vector. Note that the pointers you are actually storing are pointers to char literals. The strings are not copied. It doesn't make a lot of sense to mix the C++ style <code>vector</code> with the C-style char pointers. Its not illegal to do so, but mixing paradigms like this often results in confused & busted code. Instead of using a <code>vector<char*></code> or a <code>vector<char></code>, why not use a <code>vector<string></code> ? <h2>EDIT</h2> Based on your edit, it seems like what your'e trying to do is flatten several strings in to a single <code>vector<char></code>, with a NULL-terminator between each of the flattened strings. Here's a simple way to accomplish this: <pre><code>#include <algorithm> #include <vector> #include <string> #include <iterator> using namespace std; int main() { // create a vector of strings... typedef vector<string> Strings; Strings c_strings; c_strings.push_back("Stack Over Flow"); c_strings.push_back(""); c_strings.push_back("Answer"); /* Flatten the strings in to a vector of char, with a NULL terminator between each string So the vector will end up looking like this: S t a c k _ O v e r _ F l o w \0 \0 A n s w e r \0 ***********************************************************/ vector<char> chars; for( Strings::const_iterator s = c_strings.begin(); s != c_strings.end(); ++s ) { // append this string to the vector<char> copy( s->begin(), s->end(), back_inserter(chars) ); // append a null-terminator chars.push_back('\0'); } } </code></pre>
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1. POHow to work with null pointers in a std::vector
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UserLastEditorUserId
1. USJohn Dibling
UserOwnerUserId
1. USJohn Dibling
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