Hi =D, i want to make a list of lists that contain structures, like this:
Now i want a list of "listLetters", i tried this:Code:typedef struct{ char AAAA[20+1]; char BBBB[40+1]; char CCCC[60+1]; } Letters; typedef std::list<Letters> listLetters; typedef std::list<Letters>::iterator IteratorListLetters;
but it results on some warnings...Code:std::list<listLetters> ListofListLetters;
Anyone can tell me the right way to do this? i really have to make a list of lists of struct.
No idea - it compiles for me.
You're going to have to post some actual code and some actual error messages.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
what compiler are u using? i'm using the compiler of MS Visual Studio 6.
the code is the same of the post, and this is the warnings:
c:\arquivos de programas\microsoft visual studio\vc98\include\list(125) : warning C4786: '?$reverse_bidirectional_iterator@Viterator@?$list @V?$list@UstInfo@@V?$allocator@UstInfo@@@std@@@std @@V?$allocator@V?$list@UstInfo@@V?$allocator@
UstInfo@@@std@@@std@@@2@@std@@V?$list@UstInfo@@V?$ allocator@UstInfo@@@std@@@3@AAV43@PAV43@H' : identifier was truncated to '255' characters in the browser information
C:\PROJECTS\FontesVc\TestSrv\Srv.cpp(75) : see reference to class template instantiation 'std::list<class std::list<struct stInfo,class std::allocator<struct stInfoTag> >,class std::allocator<class std::list<st
Last edited by Rafa T.; 01-02-2011 at 08:29 AM.
g++ 4.4.3
Interesting that you mention Visual Studio 6.
It's well over 10 years old now, and is known to be quite buggy in the STL.
Example of how to get past the problem
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
i know man, i use g++ too, but its work....
how i access a member of the list inside of the list?
If you are maintaining an existing program then too bad, I suppose. Otherwise, I suggest that you fight for an upgrade to a newer compiler that conforms better to the C++ standard.Originally Posted by Rafa T.
As for warning: you might be able to just ignore it since it is about a potential problem with name mangling producing too long a name.
The usual ways, e.g., by an iterator.
Look up a C++ Reference and learn How To Ask Questions The Smart Way
But how i use the interator of the list inside of the list? how i acess members of the list inside of the list?
is a list of lists of structs, i need to compare a field of the struct, like:
ListOfLists->ListX->field01 == "AAA";
i can acess ListOfLists with interator, but what i have to do to acess ListX inside of ListOfLists, with ListofLists iterator? Can u give me an example?
TY for information.
So if you have
then an iterator through a listlistLetters will in turn point at all the listLetters inside the bigger list.Code:typedef list<Letter> listLetters; typedef list<listLetters> listlistLetters;
Code:listlistLetters bob; listlistLetters::iterator ptr = bob.begin(); //ptr now points at the first list-of-letters inside the big list ptr++; //ptr now points at the second list-of-letters inside the big list //etc.
almost this... i need to acess the field of one of the ListLetters that are inside ListListLetters
Then do so. Since it's a list, you don't have much choice but to start walking at ptr->begin() and advance forward until you get to ptr->end().
An example please guys.... how i use the iterators of the ListLetterx, that is inside od ListListLetter...
ListListLetter
|
|------- ListLetterx|
| |---- AAAA
| |
| |---- BBBB
|
|------- ListLettery|
|---- CCCC
|
|---- DDDD
i need to acess "AAAA" or "BBBB", the value inside the list that is inside the list. Help me =/
Here is an example:
Code:#include <iostream> #include <list> struct Letters { char AAAA[20 + 1]; char BBBB[40 + 1]; char CCCC[60 + 1]; }; typedef std::list<Letters> LettersList; typedef std::list<LettersList> LettersListList; int main() { using namespace std; LettersListList list; // Populate list // ... // Print list for (LettersListList::iterator i = list.begin(), i_end = list.end(); i != i_end; ++i) { for (LettersList::iterator j = i->begin(), j_end = i->end(); j != j_end; ++j) { cout << "AAAA: " << j->AAAA << "BBBB: " << j->BBBB << "CCCC: " << j->CCCC << endl; } } }
Look up a C++ Reference and learn How To Ask Questions The Smart Way
Thank you and all here for the help, it worked!
Don't forget that you need to use strcmp to compare the strings since they're pure C-strings!
