How to fix the bug of the program?Thank you! - C / C++ / MFC Discussion Boards

Re: &amp;quot;Got Focus&amp;quot; on a tab page

Ger Hayden4-Nov-05 4:17

Ger Hayden

4-Nov-05 4:17

OnClickTab - Now that sounds like a very good idea. I'll try it out...

Thanks

Ger

Re: &quot;Got Focus&quot; on a tab page

David Crow4-Nov-05 5:08

David Crow

4-Nov-05 5:08

Ger Hayden wrote:
When I click a tab page I want to be able to set a flag to indicate to the system that this page has been visited.

A page will have an invalid window handle until it has been visited at least once.

Ger Hayden wrote:
Basically when a page gets focus it needs to ensure that any activity on its sister page has been saved before it can proceed, so the sister page will need to have set something

This is what OnKillFocus() is for.

"Take only what you need and leave the land as you found it." - Native American Proverb

Help!!!

friendly man3-Nov-05 21:48

friendly man

3-Nov-05 21:48

How to know whether the sound card is an 5.1/7.1 channels audio supported card by code?

totally confused about UINT_PTR

Saurabh.Garg3-Nov-05 21:46

Saurabh.Garg

3-Nov-05 21:46

can someone please explaing what type is UINT_PTR. Is it pointer to unsigned integer or just an alias for unsigned integer? Unsure | :~

after looking in basetsd.h file I found it is defined as :
typedef _W64 int INT_PTR;

so it seems it is unsigned integer, but then why people at microsoft has choosen such an ambiguous name for it or is it just PTR doesnt mean pointer and I am misinterpreting it. Sniff | :^)

thanks
-Saurabh

-- modified at 4:03 Friday 4th November, 2005

Re: totally confused about UINT_PTR

Johann Gerell3-Nov-05 22:24

Johann Gerell

3-Nov-05 22:24

Use INT_PTR and UINT_PTR when casting a pointer to something else and you want to express that it's casted to something with the same size as a pointer.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/win64/win64/the_new_data_types.asp[^]

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winprog/winprog/windows_data_types.asp[^]

--
The Blog: Bits and Pieces

Re: totally confused about UINT_PTR

S. Senthil Kumar3-Nov-05 23:22

S. Senthil Kumar

3-Nov-05 23:22

Like Johann said, it's used to treat a pointer as an UINT. There's INT_PTR, which treats the pointer as an INT and so on.

Pretty useful for writing platform independent code. Simply casting a pointer to unsigned int won't work on a 64 bit platform, for example.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: totally confused about UINT_PTR

qfegd4-Nov-05 3:39

qfegd

4-Nov-05 3:39

There is 2 definitions for UINT_PTR:

if _WIN64 is defined it is a unsigned __int64 (a integer on 64 bit)

if not it is defined as an unsigned int (a integer on 32 bit)

Eric

How to fix the bug of the program?Thank you!

China_Boy3-Nov-05 21:28

China_Boy

3-Nov-05 21:28

#include <vector>
#include <fstream>
#include <iostream>

//英文检索程序
using namespace std;

typedef struct Line
{

int LineNumber; //行数

int Pos; //位置

} LINE;

vector< LINE > Array_Line(200);

//进行字符串的分割

int partition( char * s1 , char * s2 , int pos )
{

int i = pos; //从欲分割的位置开始进行分割

while( s1[i] == ' ' ) //忽略字符串前的所有空格符号
{
i++;
}

if( s1[i] != '\0' ) //判断字符是否已结束
{
int j = 0;

//复制非空格符直到找到下一个空格符
while( s1[i] != '\0' && s1[i] != ' ' )
{
s2[j] = s1[i];
i++;
j++;

}

s2[j] = '\0'; //设置分割字符串之结束字符

return i;

}

return -1;
}

//子字符串的判断

bool Juge( char * strDes , char * strS )
{
int len = strlen( strDes );

for( int i = 0 ; i < len ; i++ )
{
if( strDes[i] != strS[i] )
{
return false;
}
else if( strDes[i] == strS[i] && i == ( len - 1 ) )
{
return true;
}

}

return false;
}

//在一篇文档里找出某字符串的所有行号和个数

int Counter( ifstream file , char * str )
{
int Counter = 0; //设置计数变量起始值

int Number = 0;

int index = 0;

int times = 0;

int position = 0;

char strChar[1024] = {' '};

char partition_string[255] = {' '};

while( !file.eof() )
{

Counter++; //行数加一

file.getline( strChar , 1024 , '\n' ); //读取一行的内容

int tmp = 0;

int pos = 0;

while( ( position = partition( strChar , partition_string , position ) ) != -1 )
{
pos++;

if( Juge( str , partition_string ) )
{
tmp++;

Array_Line[index].LineNumber = Counter;

Array_Line[index].Pos = pos;

Number += tmp;

index++;

}

}

}

return Number; //返回计数值
}

void main()
{
ifstream fin("I:\\Str.dat");

int number = Counter( fin , "cat" );

cout<

Re: How to fix the bug of the program?Thank you!

kakan3-Nov-05 21:35

kakan

3-Nov-05 21:35

Exactly what's the problem/bug?

Re: How to fix the bug of the program?Thank you!

China_Boy3-Nov-05 23:44

China_Boy

3-Nov-05 23:44

access violation

Re: How to fix the bug of the program?Thank you!

toxcct4-Nov-05 2:29

toxcct

4-Nov-05 2:29

China_Boy wrote:
access violation

dude, give us some infos !!!

Where ?

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: How to fix the bug of the program?Thank you!

ThatsAlok6-Nov-05 21:42

ThatsAlok

6-Nov-05 21:42

China_Boy wrote:
access violation

generally result from accesing unintialized memory

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

how much does the pre-compile header help to reduce the compile time?

followait3-Nov-05 21:22

followait

3-Nov-05 21:22

how much does the pre-compile header help to reduce the compile time?

Re: how much does the pre-compile header help to reduce the compile time?

Johann Gerell3-Nov-05 22:24

Johann Gerell

3-Nov-05 22:24

If your project is more than a couple of files - lots!

--
The Blog: Bits and Pieces

urgent: howto create an instance of unmanaged c++ classes

FreeClimber3-Nov-05 20:56

FreeClimber

3-Nov-05 20:56

Hi,

i hold a pointer to an instance of an unmanaged c++ class in my managed c++ class. just like in the example i found on msdn.

msdn example

This example don't works. I get an unresolved extern symbol error, caused by calling m_pC = new CppClass();

Is there anybody who can tell me how i can create an instance of this CppClass?

Thanks

Re: urgent: howto create an instance of unmanaged c++ classes

toxcct3-Nov-05 21:07

toxcct

3-Nov-05 21:07

the only reason an "unresolved symbol" could occur on such a line is when you declared your CppClass class in its own .h header file, and forgot to #include"" this header in the .cpp file that uses it...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: urgent: howto create an instance of unmanaged c++ classes

FreeClimber3-Nov-05 21:14

FreeClimber

3-Nov-05 21:14

no... everthing is declared in the same header file. I really have no idea what i do wrong.

I just take the given example into one header file.

Re: urgent: howto create an instance of unmanaged c++ classes

toxcct3-Nov-05 21:15

toxcct

3-Nov-05 21:15

so, what it the exact denomination of the error please ?

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: urgent: howto create an instance of unmanaged c++ classes

FreeClimber3-Nov-05 21:41

FreeClimber

3-Nov-05 21:41

error LNK2001: Nichtaufgelöstes externes Symbol "void * __cdecl operator new(unsigned int)" (??2@$$FYAPAXI@Z)

and

error LNK2001: Nichtaufgelöstes externes Symbol "void __cdecl operator delete(void *)" (??3@$$FYAXPAX@Z)

here the source.

using namespace System;

namespace CTest
{
	class CppClass
	{
	public:
		// constructor
		CppClass() {}
		// destructor
		~CppClass() {}
		// methods
		void native_f() {}
	};


	__gc class MClass
	{
	public:
		// constructor
		MClass() { m_pC = new CppClass(); }
		// destructor
		~MClass() { delete m_pC; }
		// method
		void managed_f() { m_pC->native_f(); }
	private:
		CppClass * m_pC;
	};
}

Multiple desktop

Nishad S3-Nov-05 20:55

Nishad S

3-Nov-05 20:55

How can I move a window from one desktop to another?
In my program I use two desktops created by me. SetThreadDesktop(...) don't work.

Thank you.

- NS -

Get width and font of a character ?

kendao3-Nov-05 20:51

kendao

3-Nov-05 20:51

Hi All,

I wanna get the width and height of a character with font "Arial" or any fonts, do you have any solution for this case ?

Thanks

Re: Get width and font of a character ?

Rob Caldecott3-Nov-05 22:07

Rob Caldecott

3-Nov-05 22:07

Try GetTextExtent - this will give you the width/height of a string (make sure the corrent font is selected into the DC). There is more than one way to do this - maybe others will respond...

The Rob Blog
Google Talk: robert.caldecott

Re: Get width and font of a character ?

ThatsAlok6-Nov-05 21:47

ThatsAlok

6-Nov-05 21:47

kendao wrote:
I wanna get the width and height of a character with font "Arial" or any fonts, do you have any solution for this case ?

Is GetCharWidth() api of any help

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Release dlls

nripun3-Nov-05 20:28

nripun

3-Nov-05 20:28

i have an ADC device. the manufacturer provided a dll .lib and .h to operate the device. But he hasnt mentioned if the dll is release or debug. I used the dll in release and debug mode programs and found it to work in both. Can a dll work in both release and debug mode programs?
The manufacturer doesnt have any idea of release and debug dlls?

Re: Release dlls

kakan3-Nov-05 21:07

kakan

3-Nov-05 21:07

It's most likely a release version. It will work in debug and release builds of your code, as long as you use the same kind of runtime library (Multithreaded (DLL) vs Single-Threaded)

If you try to single-step into a function (during a debug session) and the debugger jumps to the next line in your code, then the dll is definately a release version.

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