C / C++ / MFC Discussion Boards

Re: warning C4018: '<' : signed/unsigned mismatch

Rage19-Jan-06 23:33

Rage

19-Jan-06 23:33

Really ? I thought -32768 <= int <= 32767 ? Or did I misunderstand your thread ?

~RaGE();

Re: warning C4018: '<' : signed/unsigned mismatch

toxcct19-Jan-06 23:38

toxcct

19-Jan-06 23:38

arf, nop, you're right...

maybe i am not woke up correctly, because i had in mind that it was between [-32767 ; +32768]
D'Oh! | :doh:

my mistake...

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

-- modified at 5:46 Friday 20th January, 2006

Re: warning C4018: '<' : signed/unsigned mismatch

Rage20-Jan-06 1:45

Rage

20-Jan-06 1:45

I sort of remember it easily, because of the following story:

<free entertainement="">
Here we are working on 16bit microcontrollers, meaning our greater available type is int. We usually work with signed int. Recently we had a reset due to our math function that was computing the absolute values. This function would do :

void Abs(param)
{
if (param<0) return (-param) else return param;
}

of course, when param was equal to -32768, the function did return an overflow, since --32768 = 32768 cannot be contained by an int Roll eyes | :rolleyes:

~RaGE();

Re: warning C4018: '<' : signed/unsigned mismatch

toxcct20-Jan-06 1:53

toxcct

20-Jan-06 1:53

i'll try to remember that Wink | ;)

however, off topic remark :
if (param<0) return (-param) else return param;
is missing a ';' before else statement... Poke tongue | ;-P

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

Re: warning C4018: '<' : signed/unsigned mismatch

kakan19-Jan-06 23:43

kakan

19-Jan-06 23:43

Actually, we were both wrong. Big Grin | :-D

An int is 4 bytes, not two (anymore). That's true for Win32 anyway.

So the overlapping region of positive values is in the interval 0x00000000 to 0x7fffffff. Or in decimal: 0 to 2147483649.

0x80000000 is a negative number for a signed int, since the MSB (most significant bit) == 0x1.

Re: warning C4018: '<' : signed/unsigned mismatch

Blake Miller20-Jan-06 4:20

Blake Miller

20-Jan-06 4:20

A TRUE programming genius would just include limits.h and use INT_MIN and INT_MAX ... :->

Re: warning C4018: '<' : signed/unsigned mismatch

kakan22-Jan-06 19:29

kakan

22-Jan-06 19:29

That's too simple. What's wrong with some good old bit manipulation? Laugh | :laugh:

Re: warning C4018: '<' : signed/unsigned mismatch

Michael Dunn19-Jan-06 22:58

Michael Dunn

19-Jan-06 22:58

The problem is that the range of int and unsigned int do not overlap. So to compare those two types, an implicit type conversion happens. By the language rules, the int gets promoted to an unsigned int, which means that -1 suddenly becomes 0xFFFFFFFF.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: warning C4018: '<' : signed/unsigned mismatch

David Crow20-Jan-06 3:21

David Crow

20-Jan-06 3:21

Michael Dunn wrote:

The problem is that the range of int and unsigned int do not overlap.

I'm not understanding this, Mike. If a signed int ranges from -2147483648 to 2147483647, and an unsigned int ranges from 0 to 4294967295, would they not overlap quite a bit?

"The words of God are not like the oak leaf which dies and falls to the earth, but like the pine tree which stays green forever." - Native American Proverb

Re: warning C4018: '<' : signed/unsigned mismatch

Michael Dunn20-Jan-06 6:48

Michael Dunn

20-Jan-06 6:48

Sorry, I used the wrong word there, that's what I get for posting when I'm sleepy Wink | ;)

The two ranges aren't a subset of one another. The warning is there to say that the comparison may be doing something you're not expecting, like converting a negative value into a large positive value.

--Mike--
Visual C++ MVP Cool | :cool:

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How to localize open dialog box?

jahfer19-Jan-06 18:48

jahfer

19-Jan-06 18:48

I am using Windows 2000 Professional (English) and Visual Studio 6.0 (English, entrerprise edition) for the development.

I have created an SDI application for supporting Japanese language. In this SDI all menus are Japanese(this is what I needed). But the open dialog box still display in English. How can I change this too to Japanese?

Thanks in advance
Jahfer.

Re: How to localize open dialog box?

Rage19-Jan-06 21:52

Rage

19-Jan-06 21:52

AFAIK, the open dialog box uses the language stated in the Windows settings (Region settings and languages from the control panel), and this is not something you can change programatically.

~RaGE();

Re: How to localize open dialog box?

Aamir Butt19-Jan-06 23:40

Aamir Butt

19-Jan-06 23:40

Replace MFC71.DLL with MFC71JPN.DLL on your machine. Microsoft provides the translated MFC libraries with Visual Studio.NET 2003 and places them automatically in your System32 folder while installing Visual Studio. You can find separate MFC DLLs for most of the languages.

Regards,

Re: How to localize open dialog box?

jahfer21-Jan-06 0:19

jahfer

21-Jan-06 0:19

Thank u for all replies.

Actually, the problem with me was that I didn't used UNICODE macro.
When I took a UNICODE build, the letters changed to Japanese.
But the "open" and "cancel" text on the button still remains same.
Is there any way to change this?

Jahfer V P.

Add a User Control to a TreeView

tyours bobby19-Jan-06 18:03

tyours bobby

19-Jan-06 18:03

Hi all,

How can i add a user control as a treenode to a TreeView control using C#.

What are all the steps that i need to take in order to accomplish the above task?

Any examples or links will be helpful.

Thanks in Advance
Phani Kiran K.

Re: Add a User Control to a TreeView (Meow, meow...)

Owner drawn19-Jan-06 18:07

Owner drawn

19-Jan-06 18:07

tyours bobby wrote:
using C#.

Ask the user's of C#. There is a C# forum for this.

This is a VC++ forum.

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--Never say quits
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Re: Add a User Control to a TreeView

Rage19-Jan-06 21:53

Rage

19-Jan-06 21:53

Check this:

TreeView controls[^]

~RaGE();

Steps in including lib file and dll built in unicode

waxie19-Jan-06 17:57

waxie

19-Jan-06 17:57

Hi,

This is my situation: I have created a project (MFC) which depends on a dll with a lib file (non-unicode). Everything compiles fine (for both debug and release). But I have to build my project again in UNICODE. I have corrected everything for unicode build (as to my source code). I have now a dll and lib file built in unicode. How to I add that dll and lib file to my project? I keep getting unresolved external symbol errors for Debug Unicode and Release Unicode(I think the compiler is looking for a specific function from the dll built in unicode. I would really appreciate it if you could tell me the steps in adding my unicode lib file to the project(not just the simple right click on project and add file, that still doesn't work). Sigh | :sigh:

Thanks,

Waxie

-- modified at 23:57 Thursday 19th January, 2006

Re: Steps in including lib file and dll built in unicode

Owner drawn19-Jan-06 18:10

Owner drawn

19-Jan-06 18:10

Check like this...

#ifdef _UNICODE

   #pragma comment(lib, "your_unicode_lib.lib")

#else

   #pragma comment(lib, "your_other_lib.lib")

#endif

This will link to the appropriate library.

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: Steps in including lib file and dll built in unicode

waxie19-Jan-06 18:16

waxie

19-Jan-06 18:16

Thanks for the reply. Blush | :O

Where will be I placing this snippet of code? In what file?

waxie

Re: Steps in including lib file and dll built in unicode

Owner drawn19-Jan-06 18:18

Owner drawn

19-Jan-06 18:18

stdafx.h

This is where I do it. This is where you should do it too.

But it depends on your application and your needs.

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: Steps in including lib file and dll built in unicode

Aamir Butt19-Jan-06 23:36

Aamir Butt

19-Jan-06 23:36

Another way to do this is to create a separate configuration for unicode debug. In that configuration link your unicode libs and that will work. Similar can be done for Unicode Release.

Regards,

How to Create CSV file from MS Office files and vis-a-versa?

Amarelia19-Jan-06 17:55

Amarelia

19-Jan-06 17:55

Hi,

How to convert a .doc,.xls,.pdf etc..file to a CSV file format and then covert it back to .doc,.xls,.pdf file format.

Is there any utility/program available that can be directly integrated into my application for this job? Or Is there any support provided in MFC for the same?
Any Code snippet or function...please help.

your time and help is much appreciated.
Thanks & Best Regards,

Mahesh

Re: How to Create CSV file from MS Office files and vis-a-versa?

S Douglas19-Jan-06 21:23

S Douglas

19-Jan-06 21:23

Amarelia wrote:
Is there any utility/program available that can be directly integrated into my application for this job?

Have you tried saving the word documents as a RTF file? The excel file can be resaved as CSV (Comma delimited) file? As those are really flat text files CVS should be fine with them and office can still use them (you wont be able to use the fancy formatting of office but it should work).

Re: How to Create CSV file from MS Office files and vis-a-versa?

David Crow20-Jan-06 3:14

David Crow

20-Jan-06 3:14

S Douglas wrote:
Have you tried saving the word documents as a RTF file? The excel file can be resaved as CSV (Comma delimited) file?

That would be the route I'd choose.

"The words of God are not like the oak leaf which dies and falls to the earth, but like the pine tree which stays green forever." - Native American Proverb

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