Re: char array contains #define directive - C / C++ / MFC Discussion Boards

char array contains #define directive [modified]

nikhil_864-Nov-09 9:15

4-Nov-09 9:15

Hey guys,

So I have a directive like this:

#define NOOB_ME 1

Now let's say I have the following char array:

char buf[] = "NOOB_ME"

I want to store the char array in an int variable so that when I do a printf I should get a 1 (as per the value of the directive). Example:

int num = buf(I know this assignment is incorrect, but I want it to be the same as int num = NOOB_ME which is valid and produces an output 1)

Is there any way to get this done?

modified on Wednesday, November 4, 2009 3:32 PM

Re: char array contains #define directive

David Crow4-Nov-09 9:48

David Crow

4-Nov-09 9:48

nikhil_86 wrote:
char buf[] = "NOOB_ME"

The preprocessor is not going to mess with string literals. In other words, buf is going to contain "NOOB_ME" not "1".

The rest of your post is nonsensical. What exactly are you trying to do?

"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: char array contains #define directive

nikhil_864-Nov-09 10:01

nikhil_86

4-Nov-09 10:01

I am aware of that, my question wasn't that. Let me elaborate. To let you know what I'm really doing, I am reading keys from the keyboard and the keyboard definitions are in a input.h file in linux.
So for example KEY_A has a value of 30. So when the user types the letter A, I store A in a char array which is concatenated with "KEY_". So basically I have a char array which stores KEY_A. Now I want to set a field called event.code = KEY_A, so I do not know how to do this. Does this make any sense?

Re: char array contains #define directive

David Crow4-Nov-09 10:06

David Crow

4-Nov-09 10:06

nikhil_86 wrote:
Now I want to set a field called event.code = KEY_A, so I do not know how to do this.

What type is event.code?

Re: char array contains #define directive

nikhil_864-Nov-09 10:13

nikhil_86

4-Nov-09 10:13

its of type int
so #define KEY_A 30

the thing is I want event.code to be whatever the user types. so I want it to be different everytime.

Re: char array contains #define directive

David Crow4-Nov-09 10:22

David Crow

4-Nov-09 10:22

What are you using to "intercept" keystrokes (e.g., getch(), WM_CHAR)?

'a' has a value of 97; 'A' has a value of 65. To base those from 30, subtract 67 and 35 respectively. In other words:

event.code = key_pressed - 67; // a
event.code = key_pressed - 35; // A

If that works, it might be a tad more intuitive to do:

event.code = (key_pressed - 'a') + KEY_A;
event.code = (key_pressed - 'A') + KEY_A;

Re: char array contains #define directive

nikhil_864-Nov-09 10:41

nikhil_86

4-Nov-09 10:41

A was just an example. I need it to be dynamic, so I should be able to use KEY_B KEY_C etc. Basically whatever the user types

Re: char array contains #define directive

David Crow4-Nov-09 10:43

David Crow

4-Nov-09 10:43

And my example would do just that.

Re: char array contains #define directive

CPallini4-Nov-09 11:01

CPallini

4-Nov-09 11:01

I suppose his dynamic prescinds even from alphabetic order... Roll eyes | :rolleyes:

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: char array contains #define directive

CPallini4-Nov-09 10:47

CPallini

4-Nov-09 10:47

At runtime KEY_A simply doesn't exist, so why bother? Store directly user input.
Smile | :)

Re: char array contains #define directive

CPallini4-Nov-09 9:52

CPallini

4-Nov-09 9:52

Uhm... Could you please elaborate a bit?
Smile | :)

Re: char array contains #define directive

includeh104-Nov-09 9:54

includeh10

4-Nov-09 9:54

You can not really store a string as an int - no one can do it in the world.

May you want to match an index as a string? if so, use a index-string map.

Re: char array contains #define directive

CPallini4-Nov-09 10:59

CPallini

4-Nov-09 10:59

includeh10 wrote:
You can not really store a string as an int - no one can do it in the world.

I can:

#include <stdio.h>
void main()
{
	int i=0x006F6F66;
	printf("%s\n",(char*)&i);
}

CStatusBar & Tool Tips

BarryPearlman4-Nov-09 8:19

BarryPearlman

4-Nov-09 8:19

I have a 3 pane StatusBar created in class CJBK_III_SBarCls as defined in the header file as:

CJBK_III_SBarCls : public CWnd
{
CStatusBar m_CJBK_III_SBar;

............... Stuff ..............

In CJBK_III_SBarCls.cpp:
}
int CJBK_III_SBarCls::OnCreate(LPCREATESTRUCT lp_CS)
{
#define SB_STYLE_EX = WS_EX_STATICEDGE | SBARS_SIZEGRIP | SBT_TOOLTIPS | SBT_OWNERDRAW
#define SB_STYLE WS_CHILD | WS_VISIBLE | CBRS_BOTTOM

m_CJBK_III_SBar.CreateEx(m_pCJBK_III_MF, SB_STYLE_EX, SB_STYLE, ID_OBJ_SB_CLS);

............... Stuff ..............
}

This seems to work fine, including putting text and bitmaps on or into the panes. I further wish to be able to have tool tips for each pane.
If I do this in CJBK_III_SBarCls.cpp:

m_CJBK_III_SBar.GetStatusBarCtrl().SetTipText(0, _T("This is Pane 0"));
m_CJBK_III_SBar.GetStatusBarCtrl().SetTipText(1, _T("This is Pane 1"));
m_CJBK_III_SBar.GetStatusBarCtrl().SetTipText(2, _T("This is Pane 2"));

Everything compiles, links and visually displays OK. Putting the mouse over any of the panes however, does nothing.

1. What am I missing?
2. Do I hve to create a CToolTipCtrl within the class?
3. If I don't have to create a CToolTipCtrl, how does one set things like text colors, delay times, .Activate etc.?

I am trying to follow "ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.en/dv_vclib/html/7505a1f3-0c37-4cb1-b30b-af83f75bdf91.htm" in the help files.

A link to an example or simple example would be quite helpful.

Thanks,

Barry

[Message Deleted]

iMikki4-Nov-09 7:57

iMikki

4-Nov-09 7:57

This post can get deleted - I hoped to take the replies with it.

modified on Wednesday, November 4, 2009 2:50 PM

Re: Creating variables with a variable in its name

Maximilien4-Nov-09 8:18

Maximilien

4-Nov-09 8:18

nope...

(I'm not familiar with PHP, but it is probably creating "dummy" associative arrays for each new variables)

This signature was proudly tested on animals.

Re: Creating variables with a variable in its name

«_Superman_»4-Nov-09 8:30

«_Superman_»

4-Nov-09 8:30

Why do you need to do such a thing in C++.
You could always create dynamic arrays using a vector.

std::vector<std::string> name;
for (unsigned i = 0; i < 10; ++i)
     name.push_back("some value");

You can access the vector elements like -

for (unsigned i = 0; i < 10; ++i)
     cout << name[i].c_str();

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Creating variables with a variable in its name

iMikki4-Nov-09 8:49

iMikki

4-Nov-09 8:49

Im not really looking to using vectors.

Ah well I think I'll do it otherwise then :p

Thanks anyhows!

Re: Creating variables with a variable in its name

C^hris L^osinger4-Nov-09 9:03

C^hris L^osinger

4-Nov-09 9:03

a map would be much better for this, IMO.

image processing toolkits | batch image processing

Cards.dll question

David Crow4-Nov-09 6:06

David Crow

4-Nov-09 6:06

In the Solitaire game, when you are moving the card around, it moves "over"' the other cards. I'm trying to figure out how this is done using either of the draw-related functions within cards.dll. I can move a card around on the playing area just fine. If that card moves over any of the other cards, it will erase them. If I add invalidating code to the end of the OnMouseMove() function, the card I am moving becomes obscurred by the other cards constantly being redrawn. What can I do to ensure that the card I am moving stays atop the other cards and at the same keep those other cards updated?

Unless there's no other way, I'd like to use the functions provided in cards.dll if I can. I've done very little in regards to GDI so my problem(s) here may be elementary.

Thanks.

- DC

Re: Cards.dll question

«_Superman_»4-Nov-09 6:57

«_Superman_»

4-Nov-09 6:57

I believe the perfect way to go would be to use DirectX.

But you could try to set the CS_SAVEBITS style in the WNDCLASS structure for the cards window.
This way the window being moved will restore the background rather than the window in the background drawing itself.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Cards.dll question

Mark Salsbery4-Nov-09 7:11

Mark Salsbery

4-Nov-09 7:11

Hi David,

When you move a card, it leaves behind two rectangles that need to be
repainted, to fill in the area where the card was.

For each move, I would calculate those two rectangles, use
the InvalidateRect() function (twice) to add those exposed rects
to the window's update region, then call UpdateWindow() to force an
immediate redraw.

In the WM_PAINT handler, you're probably already drawing all the cards
that are visible by iterating through a collection of some kind.
If you aren't already, you'll probably want to keep track of the
Z-order of the cards so cards on top get rendered last. That means
when a card is dragged, it needs to be moved to the top of the z-order
before doing the redraws that occur while moving the card. That should
solve the "becomes obscurred by the other cards constantly being redrawn"
issue, since the card being moved is drawn last.

To keep track of z-order, I would just use a simple collection like a
CTypedPtrArray, since generally only one card at a time is going to
change in z-order, and most likely its going to move to the top. You
can just remove the card object from the array and insert it back in
at the end of the array. The WM_PAINT handler then just needs to
draw cards in the same order they are in the array.

Hopefully that all makes sense.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Cards.dll question

CPallini4-Nov-09 7:27

CPallini

4-Nov-09 7:27

I suppose that, when moving a card, it automatically comes to the top of the Z order, so, inside WM_PAINT handler it should be drawn last of all. The update region should be the union of the starting and ending position rectangles.
Just a guess: hope it makes sense.
Smile | :)

Re: Cards.dll question

Richard MacCutchan5-Nov-09 2:21

Richard MacCutchan

5-Nov-09 2:21

I'm not sure if you solved your problem but I used Catch 22[^] to learn about cards.dll; you may find it useful.

Re: Cards.dll question

David Crow5-Nov-09 2:25

David Crow

5-Nov-09 2:25

Yeah, I've been studying it the past few days. Thanks.

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