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Hi guys
I have an application which reads from an Excel sheet. The application reads from the sheet properly till a specific row is reached. After that the next row is not read properly and the subsequent read returns blank data.
Please help me with suggestions...
Regards
Sreekanth Muralidharan,
Corporate Systems Consultant [Embedded Systems],
INDIA
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i created a buffer,
how do i reduce the size of lpBuffer without losing the initial items in it.
LPBYTE lpBuffer;
lpBuffer = new BYTE[5000];
lpBuffer[0] = 'h';
lpBuffer[1] = 'i';
easiest way to make lpBuffer smaller size?!
Any help is appreciated thanks!
Mepho
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Hello
You can try to use realloc(lpBuffer, new_size)
Andrew
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Andrew Kirillov wrote:
You can try to use realloc(lpBuffer, new_size)
No! The original buffer was allocated with new.
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Sloppy Joseph wrote:
No! The original buffer was allocated with new.
So ? Does not the new equal to malloc(), and delete equal to free() ?
Andrew
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Andrew Kirillov wrote:
Does not the new equal to malloc(), and delete equal to free() ?
no, not at all !!!
new and delete are re-entring functions, while C ones (malloc, realloc, free) aren't.
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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Yes, you are right. I found the answer. I just was confused by a small sample using MFC - it was looking that they are the same. But they are not.
Thanx !
Andrew
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I guess Andrew mean to use maalloc(...) then realloc(...) no "new" shoud be used in this case.
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you could use list<> or vector<>.
otherwise, the only way is to create a new array (using new operator, the length you like), then copy the datas you want to preserve during the "resize operation", then delete the old array...
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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If possible, use stack memory instead of allocating. Then you don't have to care about size.
Don't try it, just do it! 
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Why do you want to decrease the size of the buffer? You know that there are no easy ways to manipulate the size of an array! The only way to change the size of an array is to create a complete new one with the size you want and copy all the items you can from the old array..
As other users pointed out, you can use a std::vector or some other collection class.
Behind every great black man...
... is the police. - Conspiracy brother
Blog[^]
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Something like:
LPBYTE lpBuffer2 = new BYTE[1000];
memcpy(lpBuffer2, lpBuffer, 2 * sizeof(BYTE));
delete [] lpBuffer2; The other way is to not make it too big in the first place. Lastly, even if you ended up just using 2 of the 5000 bytes, that's not a big deal in the overall scheme of things.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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Strange.
Declare and array of 1000 bytes, then copy 2 bytes from the old array to the new array.
INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen
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John R. Shaw wrote:
Strange.
Indeed, but since the OP did not specify what size he wanted the array "shrunk" to, I just pulled a smaller number from the sky.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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:-DYeh; I thought about that after the fact.
Normaly I just substitute the numbers with something like new_array_size. Because it is closer to how we would actually write it.
INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen
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John R. Shaw wrote:
Normaly I just substitute the numbers with something like new_array_size. Because it is closer to how we would actually write it.
Yes, I've done that too, only to be asked shortly afterwards, "What is this new_array_size thing and how do I use it?"
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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Ya first of all just like to thank everyone for helping out
cant use Cbytes for the application
and ya the buffer doesnt get filled by only 2... its filled by user specified items. So ill probably use the memcpy function that DavidCrow suggested, the buffer will be reduced by checking the amount the user filled.
Was hoping i didnt need to create another buffer array but seems like best solution is to cpy it so far.
Thanks,
Mepho
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When using a timer SetTimer(Bla,1000,0) the count start inside the timer or it waits until it get out of the ontimer function to start the time
/\|-||\/|/\|)
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hi
i want to know how to attach bmp file as attachment in email in vc. i m not using the MAPI and using the smtp server to send email.
ddd
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Read the SMTP RFC!
Don't try it, just do it!
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See these examples.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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Hello all, I decide to have a list control, where it will print out the error message in red and the information message in green.
I try to take a look on http://www.codeproject.com/listctrl/lvcustomdraw.asp
The item is colered, based on their position. However, I need a way to store, to indicate whether this item represents error or information message.
Hence, I use the following approach:
In my method which inserting the control list item:
LVITEM lvi
lvi.lParam = ERROR_MESSAGE
In my custom draw method:
NMLVCUSTOMDRAW* pLVCD = reinterpret_cast<nmlvcustomdraw*>( pNMHDR );
if ( (pLVCD->nmcd.lItemlParam) == ERROR_MESSAGE)
However, I always get something else in pLVCD->nmcd.lItemlParam
How I can pass the "error message" information to the custom draw message handler? Can anyone please advice on my implementation?
Thank you.
cheok
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