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Thank you so much... I didn't notice that point !!!!
MaestroProgramador.Com
I didn't fail hundred times, I found hundred ways that didn't work.
No fallé cien veces, encontré cien maneras de que no funcionara.
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hi can someone tell me exactly what a shallow copy
does it or is it a refrence
is it good or bad to use
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Say you have a structure that looks like this:
struct
{
int x ;
char* p ;
} ;
If you copy an instance of this structure, the int will copy fine since it is a simple data type but the char* pointer causes problems.
If you just copy the value of p over (a shallow copy), you will have two instances of your structure that have a pointer to the same string. This causes problems when cleaning up - who has responsibility for free'ing the string? You don't want to do it twice.
A deep copy does an intelligent copy - it will make copies of the structure's data members where necessary. In this case, it will allocate a new block of memory and copy the string data over.
"Sucks less" isn't progress - Kent Beck [^]
Awasu 1.1.3 [^]: A free RSS reader with support for Code Project.
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bhangie wrote:
what a shallow copy does
The copy is shallow when only the pointer is copied:
void ShallowCopy(int* a)
{
int* b;
b = a;
}
The copy is deep when the value at which the pointer points is copied:
void DeepCopy(int* a)
{
int* b;
*b = *a;
}
bhangie wrote:
is it good or bad to use
Depends on the situation. If a shallow copy is deleted, the original pointer no longer points to the expected data, which of course can be disasterous.
That's one reason to implement copy constructors in C++, to ensure member pointers are copied correctly.
--
Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. (Douglas Adams)
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Hello All,
I am new to this Forum and need some details. I plan to Study C++ , can anyone suggest a good book to get a good working Knowledge of teh Language.
I am Studying in a College, and staying in a Hostel, so my resources are limited, I can access a Computer terminal 24 Hrs, but won't have access to Visual C++, Can anyone suggest the next best alternative, that is free for Download and can help me in my Objective ????
I know that this section might not be the best place to ask this query, But i need advice immediately. I'd be grateful if anyone can pass on any info regarding this. Looking forward to hearing from you all.
Regards,
Ajit
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Thanks for the Response. Any idea of the next best alternative to Visual package to execute these programs.
Regards,
Ajit
"Insanity is my Birth Right!!!!"
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How to use the source code run in visual c++ after download from this website?
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Double-click the .dsw file and build the application (menu Build ).
_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)
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How to laod a bitmap over a button?Also i want to change the bitmap when I click the button...
Boby
boby
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u can use speen button or bitbtn! look at it's proerties and change..
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You should insert your bitmaps into your resource file and then load them into your code. CButton class has its own functions for loading bitmaps from resources.
MaestroProgramador.Com
I didn't fail hundred times, I found hundred ways that didn't work.
No fallé cien veces, encontré cien maneras de que no funcionara.
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hi boby
u can use the CIconicButton class or CRolloverButton class for this task.
u can find this class form codeproject site
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Hi All,
I need to detect the mouse/keyboard clicks on one windows application so that I can send the same to another identical application running on another pc and have it do the same stuff.
I am having trouble figuring out how to monitor events on an application externally from another application (meaning I can't modify the code of the application whose events I want to monitor).
Any ideas or advice. Need HELP!! Thanks.
Regards,
Zahid
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Look for "Hooking" or "Hooks".
Hosam Aly Mahmoud
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I am using SQL SERVER 7.0 with OLE DB connection, i can display and add arabic text to the database, but when i try to run sql command to query arabic text i got no results, with out arabiic it is working.
Sinan Swedani
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Can guarantee that 0 or -1 will not to be a threadid in my applicaton in any version of windows??
John
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Do you know if a new thread always has bigger id value than a thread created earlier? Thanks.
[Edit]Just verified on my XP, the answer is no.[/Edit]
My articles and software tools
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Since I don't have the NT source handy, I can't say. But if true, that's an internal implementation detail that you should not even consider relying on.
--Mike--
Ericahist | CP SearchBar v2.0.2 | Homepage | RightClick-Encrypt | 1ClickPicGrabber
Kosh reminded me of some of the prima-donna programmers I've worked with. Knew everything but when you asked them a question; never gave you a straight answer.
-- Michael P. Butler in the Lounge
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This was what I was thinking but I was not sure about that. I have never noticed an application with a thread id of 0 but if I assume this and I am wrong in the highly unlikely case that the thread had an id of 0 the program would crash.
John
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It has been stated as a fact from AMD, that chips with a speed greater than or equal to 300Mhz conflict with Win95 OSR2. Explicitly, the boot process yields the message,
"While Initializing Device IOS: Windows Protection Error. You Need to Restart Windows".
This is the message I recieved after a clean install of 95 with a K6-2 500Mhz processor. I did get 95 to boot by clocking the chip down to 166Mhz. I then tried to install the chip update from AMD's web but recieved a message about a Restriction error. The details of the error are as follows:
caused an exception c0000006H in module at 0000:bff832f3.
Registers:
EAX=20040000 CS=0137 EIP=bff832f3 EFLGS=00010206
EBX=01047000 SS=013f ESP=827e4c84 EBP=827e4cb4
ECX=81789200 DS=013f ESI=0000100d FS=0da7
EDX=c10d1700 ES=013f EDI=0100d000 GS=0000
Bytes at CS:EIP:
08 0f 6a 00 6a 01 56 68 0d 00 01 00 e8 d0 e0 fe
Stack dump:
20040000 000002bb 00000014 81789064 00000050 00000003 00000000 00000003 00000000 00000000 00000001 817892bc 827e4e00 bff85528 00000014 00000000
The only conclusion this message gives me is that the K6 and K6-2 register and stack architecture don't coincide. How can I get the processor to run at 500Mhz?
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Sorry, but you are addressing a question that doesn't belong to this forum. I don't think anyone will help you here.
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