C / C++ / MFC

31-Mar-09 23:46

i define my own reserved keyword like"_if,_while" and some operations

like "move","opendialogue" and some complex operations"<=","=="

and now i want to make a compiler to analyse "myself language"

how to make

thank you everybody Big Grin | :-D

modified on Wednesday, April 1, 2009 6:15 AM

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer31-Mar-09 23:50

31-Mar-09 23:50

jeansea wrote:
How I let compile know what i want to do

That's what source code is for...

Beyond that, I have no idea what you're asking.

Before writing code, you need to have a clear idea yourself what you want the computer to do for you. You need to be able to do the work yourself with pen and paper, then convert that to computer code.

Good luck,

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!

jeansea1-Apr-09 0:11

1-Apr-09 0:11

sorry for my poor english

i know i write the code in a file IF.txt

now compiler to read the IF.txt

then to execute the code in IF.txt,i don't know now to execute the code

in IF.txt Poke tongue | ;-P

holp you can realize what i say Poke tongue | ;-P

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer1-Apr-09 0:29

1-Apr-09 0:29

jeansea wrote:
sorry for my poor english

I don't mind - I was just having trouble working out how to help you.

Why are you writing code in a txt file? You are posting in a C/C++ forum, so what's wrong with writing C code?

If you are meaning some sort of script you can change anytime, then look at different technology, like (old timers shout "hey!") bat files, or the new windows scripting host scripts.

I haven't played with the new scripting very much though.

As CPallini said, maybe you should buy a book on C, and start reading. Hopefully it will make some sense - even if it only helps you ask more solid questions.

Good luck with your journey,

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!

Cedric Moonen31-Mar-09 23:59

Cedric Moonen

31-Mar-09 23:59

C++ is not a scripting language, so you can't compile things on the fly. You could however write your own 'scripting' language but if you need something a bit evolved, that would be a crazy solution. Why don't you instead integrate an existing scripting language into your application ? Take a look at LUA[^] for instance.

I guess that's what you are looking for but your question is not very clear. So if that's not waht you are looking for, rephrase your question so that it is a bit more understandable.

Cédric Moonen
Software developer

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

CPallini1-Apr-09 0:17

1-Apr-09 0:17

What are you trying to do?
Do you want to use your file as input for the C++ compiler?
If the answer is yes then you've to follow some rules, i.e. read a good C/C++ tutorial and try again.

Do you want instead to write your own compiler/ interpreter?
Then you should really read some good book about.

Do you want just to write a script?
Then have a look, for instance, at JScript or VBScript documentation.
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]

jeansea1-Apr-09 0:50

1-Apr-09 0:50

i want to write my own compiler/ interpreter

Rajesh R Subramanian1-Apr-09 1:35

Rajesh R Subramanian

1-Apr-09 1:35

jeansea wrote:
i want to write my own compiler/ interpreter

Compiler and interpreter belong to two different worlds. So, your first task would be to read up and understand how they both work and decide on choosing to create either a compiler or an interpreter.

Somehow I see this is an ambitious project for you, but goodluck nevertheless.

It is a crappy thing, but it's life -^ Carlo Pallini

jeansea1-Apr-09 2:02

1-Apr-09 2:02

thank you Reply my question

i want to make a compiler to analyse specify format(the format is i

define include the reserved keyword and other operations) files

but i don't have any ideas so write this for some help

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 | :)

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++

jeansea1-Apr-09 2:21

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

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 Make a Simple compiler - NOTHING LIKE THE ORIGINAL MESSAGE

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

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

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.

CPallini1-Apr-09 0:32

1-Apr-09 0:32

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

bhanu_85091-Apr-09 0:39

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);
}

CPallini1-Apr-09 0:45

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:

bhanu_85091-Apr-09 0:55

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);
}

bhanu_85091-Apr-09 1:46