C / C++ / MFC

17-Jul-06 11:24

Harold_Wishes wrote:
display them on the screen?

I don't believe any Regular Expression Engine will know anything about displaying results on a screen.

Harold_Wishes wrote:
can search patterns in a file

It is also unlikely that a Regular Expression Engine will know about searching files.

Harold_Wishes wrote:
built-in Regular expressions algorhythm

Regular Expressions are not part of the ISO C++ standard... yet. There is a Regular Expression Library in Boost (boost.org)

"Just about every question you've asked over the last 3-4 days has been "urgent". Perhaps a little planning would be helpful?"
Colin Angus Mackay in the C# forum

led mike

dynamic array of strings

jon-8017-Jul-06 10:24

Re: dynamic array of strings [modified]

17-Jul-06 10:24

I am trying to create a dynamic string array m_pSentences[iLineCount], where iLineCOunt is the number of lines in a text file.

What should the synthax be?

Error:
(35): error C2440: '=' : cannot convert from 'char (*)[1000]' to 'char *'

Code:

char strSentence [MAX_SENTENCES_PER_FILE + 1] [MAX_CHARS_PER_SENTENCE + 1] = {""};
char strFileToRead[MAX_FILEPATH_LENGTH + 1] = {"c:\\temp\\testfile.txt"};

int iLineCount = 0;

// read the file and update temporary array
fstream file_op(strFileToRead, ios::in);
while(!file_op.eof())
{
file_op.getline(strSentence[iLineCount], MAX_CHARS_PER_SENTENCE);

iLineCount++;
}
file_op.close();

// create an array of sentences
char *m_pSentences;
m_pSentences = new char[iLineCount + 1] [MAX_CHARS_PER_SENTENCE];
for (int iIndex = 0; iIndex <= iLineCount; iIndex++)
{
strcpy(strSentence[iIndex], m_pSentences);
//m_pSentences[iIndex] = *strSentence[iIndex];
}

for (int iIndex = 0; iIndex <= iLineCount; iIndex++)
{
cout << m_pSentences[iIndex] << endl;
}

delete [] m_pSentences;
}

Jon

C^hris L^osinger17-Jul-06 10:48

17-Jul-06 10:48

char *m_pSentences[MAX_SENTENCES_PER_FILE];

but, you'd be much better off using CString or std::string and some kind of container class:

vector< std::string > sentences;
sentences.push_back("this is sentence 1.");
sentences.push_back("this is sentence 2.");

CStringArray sentences;
sentences.Add("this is sentence 1.");
sentences.Add("this is sentence 2.");

messing around with multi-dim arrays is more trouble than it's worth, in most cases.

Do the chickens have large talons?

-- modified at 22:42 Monday 17th July, 2006

led mike17-Jul-06 11:02

17-Jul-06 11:02

Chris Losinger wrote:
messing around with multi-dim arrays is more trouble than it's worth, in most cases.

What is it worth? Big Grin | :-D

C^hris L^osinger17-Jul-06 11:06

17-Jul-06 11:06

it's worth knowing how multi-dim arrays work. not everything can (or should) be put into a vector - strings definitely should.

Do the chickens have large talons?

led mike17-Jul-06 11:19

17-Jul-06 11:19

Chris Losinger wrote:
it's worth knowing how multi-dim arrays work

Trixy answer... I like it! Laugh | :laugh:

jon-8018-Jul-06 10:52

18-Jul-06 10:52

I’m trying to create a function that creates an array of strings when reading from a text file.

This object seems to require afxcoll.h to be included and I've included them in my console application, however a couple of errors crop up. I also tried to include it within an MFC application, since this is an MFC class, but they won't compile as well.

Sentences error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in libcpd.lib(newop.obj)

Sentences error LNK2005: "void __cdecl operator delete(void *)" (??3@YAXPAX@Z) already defined in LIBCD.lib(dbgdel.obj)

Sentences error LNK2005: "void __cdecl operator delete[](void *)" (??_V@YAXPAX@Z) already defined in LIBCD.lib(delete2.obj)

Sentences error LNK2019: unresolved external symbol __endthreadex referenced in function "void __stdcall AfxEndThread(unsigned int,int)" (?AfxEndThread@@YGXIH@Z)

Sentences error LNK2019: unresolved external symbol __beginthreadex referenced in function "public: int __thiscall CWinThread::CreateThread(unsigned long,unsigned int,struct _SECURITY_ATTRIBUTES *)" (?CreateThread@CWinThread@@QAEHKIPAU_SECURITY_ATTRIBUTES@@@Z)

Code (to test):
CStringArray strSentences;
strSentences.Add("mary");
strSentences.Add("george");

Any idea why?

Jon

C^hris L^osinger18-Jul-06 11:33

18-Jul-06 11:33

looks like you're mixing different versions of the C run-time libraries - one or more files in your app are compiled with the single-threaded CRT, but others are built with a different CRT. "new" and "delete" are defined in both, and the linker doesn't know which one to use. so, make all your files/modules/libraries use the same CRT version.

Do the chickens have large talons?

jon-8019-Jul-06 5:39

19-Jul-06 5:39

How would I check the CRT version?

Also, why is the following error being displayed?

Error
.cpp(17): fatal error C1010: unexpected end of file while looking for precompiled header directive

Code example:
#include ".\SentenceAr.h"
#include <string>
#include <iostream>

CSentenceArray::CSentenceArray(string strFileToRead, bool bCreateArray)
{}

CSentenceArray::~CSentenceArray()
{};

Jon

C^hris L^osinger19-Jul-06 5:46

19-Jul-06 5:46

jon_80 wrote:
How would I check the CRT version?

two different places:
project Properties (or Settings) General / Microsoft Foundation Classes
or, C/C+ / Category:Code Generation / Use Run-time Library.

that's VC6. VS03/05 are in similar places.

jon_80 wrote:
Also, why is the following error being displayed?

you need to add #include "stdafx.h" to the top of the file.

Do the chickens have large talons?

jon-8019-Jul-06 6:05

19-Jul-06 6:05

Does the project have to be an MFC project or can I include the MFC classes by including files?

I am using a console project to develop the classes because the code is simpler to test that way.

I have tried all the options within VS2003 for Run-time library but the code wouldn't compile in any case.

Also, I could not find stdafx.h, is it because it's not an MFC project?

Jon

C^hris L^osinger19-Jul-06 6:57

19-Jul-06 6:57

jon_80 wrote:
Does the project have to be an MFC project or can I include the MFC classes by including files?

it's far easier to do it from a project that was created to work with MFC than it is to add MFC after the fact. i'm not sure of all the steps, but you'll need to #include some stuff, set some #defines for the compiler, link the appropriate MFC libs, etc..

if you already have a non-MFC project, you might be better off with using std::string and std::vector:

#include < string>
#include < vector>
using namespace std;

...

vector < string > sentences;
sentences.push_back("this is a sentence");
sentences.push_back("this is another sentence");

...

string s = sentences[0];
etc.

Do the chickens have large talons?

Treeview creation problem

Hamid_RT17-Jul-06 19:40

Hamid_RT

17-Jul-06 19:40

SeeA TUTORIAL ON POINTERS AND ARRAYS IN C [^] maybe it is some helpful to you

whitesky

Alex Cutovoi17-Jul-06 8:57

Alex Cutovoi

17-Jul-06 8:57

Hi fellows

I`m trying to create a treeview in my app but I don`t have any sucess.
I`ve read the Microsoft article [url]http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/treeview/treeview.asp[/url]
and I`ve tried to do something like that. The problem is that whem I create a node in a function that I created it returns NULL. I think that my code is right, so what`s going on??
Thanks for the support.

Below is my code?

I created my treeview like this:

<br />
treeViewHwnd = CreateWindowEx(WS_EX_LEFT, WC_TREEVIEW, "theTreeView", WS_CHILD|WS_VISIBLE|TVS_EDITLABELS|TVS_HASBUTTONS|TVS_HASLINES|TVS_LINESATROOT, 0, 0, 150, 600, hwnd, NULL, hCurrentInstance, NULL);<br />

treeViewHwnd is a global HWND.

In this part I want to put a node in the treeview

<br />
case WM_CHAR:<br />
{<br />
    switch(wParam)<br />
    {<br />
      case 'a':<br />
      {<br />
          InitCommonControls();<br />
          treeViewHwnd = GetDlgItem(hwnd, IDC_TREE1);<br />
          OpenedWindows(GetForegroundWindow());<br />
          for(int i = 0 ; i < sNameHwnds.size() ; i++)<br />
          { <br />
             InsertNodeInTV(hwnd, sNameHwnds[i], 1);<br />
             MessageBox(NULL, sNameHwnds[i].c_str(), "", MB_OK);<br />
             break;<br />
          }<br />
          break;<br />
      }<br />
.....<br />

And here I create the node:

<br />
#define IDC_TREE1 10<br />
HTREEITEM InsertNodeInTV(HWND tvHwnd, string sNodeName, int iLevel)<br />
{<br />
      static HTREEITEM ParentItem, BeforeItem, RootItem;<br />
      ParentItem = (HTREEITEM)TVI_FIRST;<br />
      BeforeItem = RootItem = NULL;<br />
      TVINSERTSTRUCT treeViewInsert;<br />
      treeViewInsert.item.mask = TVIF_TEXT;<br />
      treeViewInsert.item.pszText = (char*)sNodeName.c_str();<br />
      treeViewInsert.item.cchTextMax = sizeof(treeViewInsert.item.pszText)/treeViewInsert.item.pszText[0];<br />
      treeViewInsert.hInsertAfter = TVI_ROOT;<br />
      treeViewInsert.hParent = NULL;<br />
      ParentItem = (HTREEITEM)SendDlgItemMessage(tvHwnd, IDC_TREE1, TVM_INSERTITEM, 0, (LPARAM)&treeViewInsert);<br />
      if(ParentItem == NULL)MessageBox(NULL, "aaa", "", MB_OK);<br />
      return ParentItem;<br />
}<br />

Re: Treeview creation problem

led mike17-Jul-06 10:49

Re: Treeview creation problem

17-Jul-06 10:49

Besides the fact that "int iLevel" is not used the rest of the code runs correctly when I have good values like tvHwnd, IDC_TREE1, etc. Therefore I suspect one of your values is incorrect.

valikac17-Jul-06 10:56

valikac

17-Jul-06 10:56

cchTextMax = sNodeName.size()

Kuphryn

Re: Treeview creation problem

led mike17-Jul-06 11:01