ATL / WTL / STL Discussion Boards

Joaquín M López Muñoz11-Feb-03 7:54

11-Feb-03 7:54

Yes, you can mix'em. This error must be due to some missing #include.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: MFC And STL

Tim Smith11-Feb-03 8:43

Tim Smith

11-Feb-03 8:43

Or he might be forgetting the std:: prefix. (i.e. std::vector).

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Question about STL stack

George211-Feb-03 0:24

George2

11-Feb-03 0:24

Hi, everyone!

When using stack in STL, I meet with the following trouble.
Here are the source codes and related error messages. How to
resolve the trouble? My IDE is VC6.0.

Source Codes:
--------
#include <iostream>
#include <vector>
#include <list>
#include <deque>
#include <stack>

using namespace std;

int main()
{
stack<vector<int> > s1;
stack<list<int> > s2;
stack<deque<int> > s3;

s1.push(1); s1.push(5);
cout << s1.top() << endl;
s1.pop();
cout << s1.size() << endl;
s1.empty()? cout << "empty" : cout << "not empty";

return 0;
}
--------

Error messages:
--------
C:\Program Files\Microsoft Visual Studio\MyProjects\testStack\testStack.cpp(15) : error C2664: 'push' : cannot convert

parameter 1 from 'const int' to 'const class std::vector<int,class std::allocator<int> > &'
Reason: cannot convert from 'const int' to 'const class std::vector<int,class std::allocator<int> >'
No constructor could take the source type, or constructor overload resolution was ambiguous
C:\Program Files\Microsoft Visual Studio\MyProjects\testStack\testStack.cpp(15) : error C2664: 'push' : cannot convert

parameter 1 from 'const int' to 'const class std::vector<int,class std::allocator<int> > &'
Reason: cannot convert from 'const int' to 'const class std::vector<int,class std::allocator<int> >'
No constructor could take the source type, or constructor overload resolution was ambiguous
C:\Program Files\Microsoft Visual Studio\MyProjects\testStack\testStack.cpp(16) : error C2679: binary '<<' : no operator

defined which takes a right-hand operand of type 'class std::vector<int,class std::allocator<int> >' (or there is no

acceptable
conversion)
--------

Thanks in advance,
George

Re: Question about STL stack

Stuart Dootson11-Feb-03 1:52

Stuart Dootson

11-Feb-03 1:52

I presume you want to create stacks contining ints, based on vector, list or deque??? What you've actually created is a stack of vectors of ints (s1), a stack of lists of ints (s2) and a stack of deques of ints (s3). To create stacks of ints based on vectors, lists or deques, use

stack<int, vector<int> > s1;
stack<int, list<int> > s2;
stack<int, deque<int> > s3;

HTH

Stuart Dootson

'Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p'

Re: Question about STL stack

George211-Feb-03 1:58

George2

11-Feb-03 1:58

Thanks, Stuart buddies!

George

Excluding implemented interfaces from the typelib

Nick Blumhardt10-Feb-03 19:20

Nick Blumhardt

10-Feb-03 19:20

Hi again,

I'm using attributed C++/ATL to create a COM server - I've come across a little annoyance: if I implement an interface on a coclass, i.e. derive from the interface, voila! its in the typelib. I want to keep a few interfaces to myself - I've tried adding the [hidden] attribute to the interface declarations, but no luck. Any suggestions?

Nick

Re: Excluding implemented interfaces from the typelib

AlexO11-Feb-03 2:22

AlexO

11-Feb-03 2:22

second typelib, that you use internaly, lets say with "#import" or just include output file from midl.exe

Services on 98

Nick Blumhardt10-Feb-03 14:06

Nick Blumhardt

10-Feb-03 14:06

Hi all, I'm undertaking a project that will eventually be run as a DCOM server. I anticipate DCOM for Win98/Me will be involved, but right now what I need to know is whether I can create the app as a service with the ATL wizard and run it as a standard EXE on any Win98 box...?

Thanks for any help,

NB

Re: Services on 98

Michael Dunn10-Feb-03 15:50

Michael Dunn

10-Feb-03 15:50

Nick Blumhardt wrote:
whether I can create the app as a service with the ATL wizard and run it as a standard EXE on any Win98 box...?

Nope, 9x does not have services (at least not like the NT concept of services). The most you can do is have the EXE call RegisterServiceProcess(), that way the process will not be killed when the current user logs out.

--Mike--
The Internet is a place where absolutely nothing happens.
-- Strong Bad

1ClickPicGrabber - Grab & organize pictures from your favorite web pages, with 1 click!
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

Re: Services on 98

Nick Blumhardt10-Feb-03 19:17

Nick Blumhardt

10-Feb-03 19:17

Thanks Mike,

Will look into that. Since I posted this message I've decided that I'd definitely have to do some funky conditional compilation so that there was no need to link to StartServiceCtrlDispatcher() etc anyway.

Maybe using the new attributed ATL I can simply switch the [module] parameters... we'll see Smile | :)

Thanks again,

Nick

Re: What is the difference between delete[] and delete?

Joaquín M López Muñoz10-Feb-03 2:24

Joaquín M López Muñoz

10-Feb-03 2:24

Use delete[] when freeing dynamically allocated arrays created like this:

int * p= new int[1024]; //array of 1024 ints

and delete for every other use of new. Rule of thumb: use brackets in delete if and only if brackets where used in the corresponding new.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: What is the difference between delete[] and delete?

George210-Feb-03 2:35

George2

10-Feb-03 2:35

Thanks, Joaquín buddies!

I can hardly imagine a case where I should use
delete without brackets.

Can you show me an example?

Cheers,
George

Re: What is the difference between delete[] and delete?

Joaquín M López Muñoz10-Feb-03 2:44

Joaquín M López Muñoz

10-Feb-03 2:44

Imagine harder Smile | :)

Never used new without brackets ([ and ])?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: What is the difference between delete[] and delete?

George210-Feb-03 3:00

George2

10-Feb-03 3:00

Hi, Joaquín buddies!

If a use new to allocate an object, should I use delete
to remove it?

For example,

--------
SomeType* p = new SomeType()
delete p;
--------

Am I correct?

Thanks in advance,
George

Re: What is the difference between delete[] and delete?

Joaquín M López Muñoz10-Feb-03 3:49

Joaquín M López Muñoz

10-Feb-03 3:49

You are correct.

I think you will benefit a lot from reading some introductory stuff to C++. Marshall Cline's C++ FAQ Lite[^] is an excellent site to start with.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: What is the difference between delete[] and delete?

George210-Feb-03 18:02

George2

10-Feb-03 18:02

Thanks, Joaquín buddies!

George

STL remove_copy_if is not working properly

George210-Feb-03 1:15

George2

10-Feb-03 1:15

Hi, everyone!

Here is my simple STL program, it is a spell-checker.
The program copy every word of text to output
that is not in the dictionary. I have added all the source
codes and error messages below. My IDE is VC6.0.
I put "abc 123 def" in c:\\dict.txt and "123 345" in c:\\words.txt.
The output should be 345, but now the output is 123 345.

Who can tell me where the error is?

Source Codes:

--------
#pragma warning(disable : 4786)

#include <iostream>
#include <algorithm>
#include <iterator>
#include <vector>
#include <fstream>
#include <string>

using namespace std;

template <class bidirectional_iterator, class T>
class nonAssocFinder {
public:
nonAssocFinder(bidirectional_iterator begin,
bidirectional_iterator end) :
_begin(begin), _end(end) {}

bool operator() (const T& word) {
cout << binary_search(_begin, _end, word);
return binary_search(_begin, _end, word); }

private:
bidirectional_iterator _begin;
bidirectional_iterator _end;
};

void main()
{
typedef vector<string> dict_type;

ifstream dictFile("c:\\dict.txt");
ifstream wordsFile("c:\\words.txt");

dict_type dictionary;

copy (istream_iterator<string>(dictFile),
istream_iterator<string>(),
back_inserter(dictionary));

remove_copy_if (
istream_iterator<string>(wordsFile),
istream_iterator<string>(),
ostream_iterator<string>(cout, "\n"),
nonAssocFinder<dict_type::iterator,
dict_type::value_type>
(dictionary.begin(), dictionary.end()));
}
--------

Thanks in advance,
George

Re: STL remove_copy_if is not working properly

Joaquín M López Muñoz10-Feb-03 9:29

Joaquín M López Muñoz

10-Feb-03 9:29

binary_search assumes the range being searched is ordered. Insert this line before remove_copy_if:

sort(dictionary.begin(),dictionary.end());

and the program will work just fine.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: STL remove_copy_if is not working properly

George210-Feb-03 18:00

George2

10-Feb-03 18:00

Thanks, Joaquín buddies!

George

Compiling error on my simple STL spell-checker.

George29-Feb-03 2:39

George2

9-Feb-03 2:39

Hi, everyone!

Here is my simple STL program, it is a spell-checker.
The program copy every word of text to output
that is not in the dictionary. I have added all the source
codes and error messages below. My IDE is VC6.0.

Source Codes:

--------
#include <iostream>
#include <algorithm>
#include <cstring>
#include <vector>
#include <fstream>

using namespace std;

template <class bidirectional_iterator, class T>
class nonAssocFinder {
public:
nonAssocFinder(bidirectional_iterator begin,
bidirectional_iterator end) :
_begin(begin), _end(end) {}

bool operator() (const T& word) {
return binary_search(_begin, _end, word); }

private:
bidirectional_iterator _begin;
bidirectional_iterator _end;
};

void main()
{
typedef vector<string > dict_type;

ifstream dictFile("dict.txt");
ifstream wordsFile("words.txt");

dict_type dictionary;

copy (istream_iterator<string>(dictFile),
istream_iterator<string>(),
back_inserter(dictionary));

remove_copy_if (
istream_iterator<string>(wordsFile),
istream_iterator<string>(),
ostream_iterator<string>(cout, "\n"),
nonAssocFinder<dict_type::iterator,
dict_type::value_type>
(dictionary.begin(), dictionary.end()));
}
--------

Warning and error messages:
--------
C:\Program Files\Microsoft Visual Studio\MyProjects\testDict\testDict.cpp(45) : warning C4786:

'std::reverse_iterator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const

*,std::basic_string<char,std::char_traits<char>,std::all
ocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > const

&,std::basic_string<char,std::char_traits<char>,std::allocator<char> > const *,int>' : identifier was truncated to '255'

characters in the debug information
C:\Program Files\Microsoft Visual Studio\MyProjects\testDict\testDict.cpp(45) : warning C4786:

'std::reverse_iterator<std::basic_string<char,std::char_traits<char>,std::allocator<char> >

*,std::basic_string<char,std::char_traits<char>,std::allocator
<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >

&,std::basic_string<char,std::char_traits<char>,std::allocator<char> > *,int>' : identifier was truncated to '255' characters

in the debug information
c:\program files\microsoft visual studio\vc98\include\iterator(176) : error C2679: binary '>>' : no operator defined which

takes a right-hand operand of type 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >'

(
or there is no acceptable conversion)
c:\program files\microsoft visual studio\vc98\include\iterator(176) : while compiling class-template member function

'void __thiscall std::istream_iterator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char>
>,char,struct std::char_traits<char> >::_Getval(void)'
--------

How to resolve the trouble?

Thanks in advance,
George

Re: Compiling error on my simple STL spell-checker.

Joaquín M López Muñoz9-Feb-03 11:23

Joaquín M López Muñoz

9-Feb-03 11:23

The warning is a problem with the compiler not being able to cope with the very long symbol names generated when instantiating STL containers. You can safely mask it by inserting

#pragma warning(disable: 4786)

at the beginning of your file. As for the second problem, I'm not 100% sure but probably inserting

#include <string>

will help. Good luck.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Compiling error on my simple STL spell-checker.

George210-Feb-03 1:10

George2

10-Feb-03 1:10

Thanks, Joaquín buddies!

George

Manta Web ATL Sample.

Bo Hunter7-Feb-03 11:14

Bo Hunter

7-Feb-03 11:14

I am tring to get this Manta Web sample to work. It does to start with
but when I try to create a new account it gives the error
OLE DB ERROR:
CAddUser::OpenRowset() returned: 0x80004005

Here is the code.

HTTP_CODE AddUser()
{
// Add the user to the database
CAddUser addUser;
lstrcpy(addUser.m_szFirstName, m_strFirstName);
lstrcpy(addUser.m_szLastName, m_strLastName);
lstrcpy(addUser.m_szEmail, m_strEmail);
lstrcpy(addUser.m_szLogin, m_strLogin);
lstrcpy(addUser.m_szHint, m_strHint);

HRESULT hr;

// don't store the real password. only store a one-way encrypted hash
DWORD dwSaltLen = 4;
DWORD dwPasswordLen = DB_MAX_STRLEN;
hr = HashSecret(
(const BYTE*) (LPCSTR) m_strPassword1, m_strPassword1.GetLength(),
(BYTE*) addUser.m_szSalt, dwSaltLen,
(BYTE*) addUser.m_szPassword, dwPasswordLen);
if (FAILED(hr))
return HTTP_FAIL;

addUser.m_szSalt[dwSaltLen] = 0;
addUser.m_szPassword[dwPasswordLen] = 0;

hr = addUser.OpenRowset(m_dataConnection, NULL);
if (hr != S_OK)
return DatabaseError("CAddUser::OpenRowset()", hr);

// Send the confirmation email
#if defined(SEND_CONFIRMATION_MAIL)
if (!SendMail())
return SMTPError();
#endif

// Create the MantaWeb persistant cookie
WritePersistCookie(addUser.m_szLogin, addUser.m_szFirstName, (m_bRememberPass) ? "1" : "0");

// Send the response page
CString strHTML;
LoadHtmlFromResource(MAKEINTRESOURCE(IDR_CONFIRM), strHTML);
strHTML.Replace("[NAME]", m_strFirstName);
strHTML.Replace("[EMAIL]", m_strEmail);
strHTML.Replace("[LOGIN]", m_strLogin);
m_HttpResponse << strHTML;
m_HttpResponse.Flush();

return HTTP_SUCCESS_NO_PROCESS;
}

It gives trouble at hr = addUser.OpenRowset(m_dataConnection, NULL);
It returns FAIL.

Thank You
Bo Hunter

Bo Hunter

Re: Manta Web ATL Sample.

TigerNinja_19-Feb-03 3:18

TigerNinja_

19-Feb-03 3:18

I could not even get this example to compile. I downloaded it directly from Microsoft and have the current SDK, and VS.NET, however, it wouldn't compile.

this sample is evil, manta web is evil. Laugh | :laugh:

R.Bischoff | C++

.NET, Kommst du mit?

resume download

Anonymous6-Feb-03 17:34

Anonymous

6-Feb-03 17:34

Hi,

I am working on the application wherein i have to download the file from the URL mentioned.

But the problem is I have to support the resume operations for broken downloads...using mfc.
How do i do this using mfc. Please give me your inputs.

TIA,
Snowy

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