Re: How To Make a Simple compiler - C / C++ / MFC Discussion Boards

CPallini1-Apr-09 1:39

1-Apr-09 1:39

I suppose you've to choose between them.
Would you start developing your first interpreter or your first compiler (Well, of course you can develp both, but you've to start with one of the two...)?

Roughly speaking developing a compiler is most difficult than an intepreter so you can start with the latter, if develpment difficulty is a factor.

Do you know that's Google matter [^]. There is also an article series, here at CP [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: How To Analyse a Simple Script

Cedric Moonen1-Apr-09 1:51

Cedric Moonen

1-Apr-09 1:51

Are you sure this is really what you want to do ? As the other pointed out, that's a difficult task. You need to ask yourself two questions:
1) Do you really need to be able to execute code from a text file at runtime ? Can't you 'simplify' your task into something like a condition and an action (that's more or less your example) ? If you design it cleverly, it could simplify a lot your code.

2) If that's not possible, are you sure you want to write your own interpreted ? Can't you use an existing scripting language instead of rewriting it yourself. If they exist, this is for a specific reason. If you already looked at this and found it too difficult, well think again because doing it yourself is gonna be way more complicated than that...

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: How To Analyse a Simple Script

jeansea1-Apr-09 2:21

jeansea

1-Apr-09 2:21

i accept your advice and then how could i do.could you give me more details

thank you very much

Re: How To Analyse a Simple Script

Cedric Moonen1-Apr-09 2:57

Cedric Moonen

1-Apr-09 2:57

jeansea wrote:
could you give me more details

That will be very difficult, since you didn't provide a lot of details on what you want to achieve...

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: How To Analyse a Simple Script

David Crow1-Apr-09 3:19

David Crow

1-Apr-09 3:19

Become very familiar with the dragon book or facsimile thereof.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Re: How To Make a Simple compiler - NOTHING LIKE THE ORIGINAL MESSAGE

Iain Clarke, Warrior Programmer1-Apr-09 2:13

Iain Clarke, Warrior Programmer

1-Apr-09 2:13

Just in case of confusion to later readers.

But the original replies did point you at some scripting resources, so I suggest you read them.

Also read the articles here: http://www.codeproject.com/KB/recipes/#Parsers[^]. It may take you some time...

Iain.

In the process of moving to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), give me a job!

Re: How To Make a Simple compiler

sashoalm1-Apr-09 2:55

sashoalm

1-Apr-09 2:55

Could you tell us why you want to make a compiler? What do you intend to use it for?

Do you intend to use it in some larger program? If that is so, you'll be better off to use some existing scripting language.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Re: How To Make a Simple compiler

Stuart Dootson1-Apr-09 3:29

Stuart Dootson

1-Apr-09 3:29

Have a look at this compiler construction tutorial[^]. Then you can make a better decision as to whether you want to drop yourself into a world of pain (which is what writing a compiler mostly is, if it's going to do much).

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

CListCtrl problem

bhanu_850931-Mar-09 23:42

bhanu_8509

31-Mar-09 23:42

Dear All,

I want to display items in a CListCtrl but by default the Horizontal scroll bar is appearing if I add more items in the list.

But I need to display only Vertical bars if I add more items. I use like below :

<pre> m_List.EnableScrollBar(SB_VERT, true);
m_List.EnableScrollBar(SB_HORZ,false);

The above works only if the list is having minimum items, when it exceeds the client area then only Horizontal bar is working and Vertical bar is shown but not working.

Re: CListCtrl problem

CPallini1-Apr-09 0:32

CPallini

1-Apr-09 0:32

Possibly you need to use the LVS_REPORT style.
Smile | :)

Re: CListCtrl problem

bhanu_85091-Apr-09 0:39

bhanu_8509

1-Apr-09 0:39

When I use Report Style, even I cannot add the items in the list.

//List Control parameters 
//CONTROL "",IDC_LIST1,"SysListView32",LVS_LIST | LVS_ALIGNLEFT | LVS_NOCOLUMNHEADER | WS_BORDER | WS_TABSTOP,112,23,84,114 (even I tried LVS_REPORT)
m_List.EnableScrollBar(SB_VERT, true);
m_List.EnableScrollBar(SB_HORZ,false);
CString strText;
int nColumnCount = 0;
for (int i=0;i &lt; 20;i++)
{
   strText.Format(TEXT("item %d"), i);
   // Insert the item
   m_List.InsertItem(i, strText);
}

Re: CListCtrl problem

CPallini1-Apr-09 0:45

CPallini

1-Apr-09 0:45

bhanu_8509 wrote:
m_List.EnableScrollBar(SB_VERT, true);
m_List.EnableScrollBar(SB_HORZ,false);

You don't need the above lines.

bhanu_8509 wrote:
When I use Report Style, even I cannot add the items in the list

What does it mean?
Confused | :confused:

Re: CListCtrl problem

bhanu_85091-Apr-09 0:55

bhanu_8509

1-Apr-09 0:55

When I use the CListCtrl using LVS_REPORT, I cannot populate the list with the items.

CString strText;
int nColumnCount = 0;
for (int i=0;i < 20;i++)
{
   strText.Format(TEXT("item %d"), i);
   // Insert the item, select every other item.
   m_List.InsertItem(i, strText);
}

Re: CListCtrl problem

bhanu_85091-Apr-09 1:46

bhanu_8509

1-Apr-09 1:46

I am sorry, I forget to Insert the column. Now I changed it and it is working fine. Thanks for your help.

Re: CListCtrl problem

bhanu_85091-Apr-09 1:46

bhanu_8509

1-Apr-09 1:46

I am sorry, I forget to Insert the column. Now I changed it and it is working fine. Thanks for your help.

Topic closed...

Using library built in VC 8.0 or VC 7.0 in Application built in VC6.0

tony_Udz31-Mar-09 23:40

tony_Udz

31-Mar-09 23:40

Hello,

I want to use a function from .lib file(which is built on VC 8.0 and VC 7.0) and my application is built in VC 6.0.

On calling function (from .lib) i get large number of linker errors.
I beleive this is because one of the one of the linker warning
"warning LNK4078: multiple ".CRT" sections found with different attributes (40300040)"

Please advice.
Thanks in Advance!

Re: Using library built in VC 8.0 or VC 7.0 in Application built in VC6.0

Stuart Dootson1-Apr-09 3:34

Stuart Dootson

1-Apr-09 3:34

tony_udz wrote:
I want to use a function from .lib file(which is built on VC 8.0 and VC 7.0) and my application is built in VC 6.0.

You can't use static libraries built with VC 7.0/8.0 with VC 6.0. Full stop. There are no workarounds, it just doesn't work - they're incompatible.

Of course, if you could make DLLs out of your static library code, you might get a bit further - but there's lots of different issues there as well.

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

How can get rows in excel sheet?

Le@rner31-Mar-09 23:17

Le@rner

31-Mar-09 23:17

Hi all,

i m using excel like this its works fine.

For example:

Start Excel

	Excel::_ApplicationPtr pApplication;	

if ( FAILED( pApplication.CreateInstance( _T("Excel.Application") ) ) )	
{
		Errorf( _T("Failed to initialize Excel::_Application!") );
		return;	
}


Load an Excel workbook

	_variant_t	varOption( (long) DISP_E_PARAMNOTFOUND, VT_ERROR );	
Excel::_WorkbookPtr pBook = pApplication->Workbooks->Open( dlgFile.m_szFileName, varOption, varOption, varOption, varOption, varOption, varOption, varOption, varOption, varOption, varOption, varOption, varOption );


Get the first worksheet

Excel::_WorksheetPtr pSheet = pBook->Sheets->Item[ 1 ];

i want to know how many rows have data in sheet.

please tell me how can i get rows count.

thanks in advance

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: How can get rows in excel sheet?

Stuart Dootson1-Apr-09 3:52

Stuart Dootson

1-Apr-09 3:52

pSheet->UsedRange->Rows->Count

You know - it would really be a good idea for you to learn about Excel and its object model if you're trying to program against it.

The easiest way to see what Excel has to offer is to open Excel, press ALT+F11 and play with VBA, especially the Object Browser (press F2 in the VBA IDE to access that).

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

Re: How can get rows in excel sheet?

Le@rner1-Apr-09 19:14

Le@rner

1-Apr-09 19:14

thanks

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

[Message Deleted]

Purish Dwivedi31-Mar-09 23:14

Purish Dwivedi

31-Mar-09 23:14

[Message Deleted]

Re: Not detecting the language of Resource DLL

CPallini1-Apr-09 0:49

CPallini

1-Apr-09 0:49

Purish Dwivedi wrote:
So how can I support languages without installing language pack either through WIN XP CD or through microsoft site.

What's wrong about WIN XP CD or MS site?
Smile | :)

[Message Deleted]

Purish Dwivedi1-Apr-09 19:07

Purish Dwivedi

1-Apr-09 19:07

[Message Deleted]

Re: Not detecting the language of Resource DLL

CPallini2-Apr-09 1:40

CPallini

2-Apr-09 1:40

Purish Dwivedi wrote:
Suppose the client doesn't have WIN XP CD or registration at microsoft, then in this situation what will be the solution?

Microsoft should sue your customer, I suppose... Roll eyes | :rolleyes:

freeing up of resources after closing the window

Deepu Antony31-Mar-09 23:12

Deepu Antony

31-Mar-09 23:12

Hi all

I am using a multidoc multiview application.In that one view(CGraphView) i am opening and depending upon certain condition(when the user change the time period) i have to close it and open it with respect to the new time selected.

After or before closing this view i need to free up the resources because when the view is again opened exception is generated as there is limited area in the heap.

I am closing the Graph as follows.

CMDIChildWnd* wnd1 = MDIGetActive();
wnd1->MDIDestroy();

Is there is any function to free up all the resources allocated for this view like when a window is closed it automatically frees the memory allocated for it.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.