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i allocated 20 bytes, 19 bytes for some string and the 20th for \0
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But ASCII 0 is still a valid character, it just happens to be a special one. Allocating 20 bytes on the heap means you can store 20 bytes.
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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DavidCrow wrote:
Allocating 20 bytes on the heap means you can store 20 bytes.
yep but you cant store 20 'A's
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Of course not. I was simply saying that your "now pszString can store upto 19 bytes of string" comment was off by one.
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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Thanks for reply, I have a problem now, see this code:
for(int i = 0 ; i < sizeof(mypointer);i++)
buffer1[i] = *(val+i);
sizeof(mypointer) cause the loop only run 3 times and other chars do not copy to array , if I change it to a larger number like 200 it works ok but I don't know how to get size of it dynamiclly.
Mazy
"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope
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Mazdak wrote:
sizeof(mypointer)
Change to:
strlen(mypointer)
When you do sizeof of a pointer it returns the size of the pointer, not the length of the string.
Rickard Andersson
Here is my card, contact me later!
UIN: 50302279
Sonork: 37318
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Thanks again Rickard.
Mazy
"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope
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change it to this way.
for(int i = 0 ; *(val+i)!=NULL;i++)
buffer1[i] = *(val+i);
since pointers are always 4 bytes sizeof(anypointer) will always return 4
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Mazdak wrote:
but I don't know how to get size of it dynamiclly.
strlen will give you the size of the string pointed by the pointer.
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Thanks.
Mazy
"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope
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If I understand you, you want to copy the data from a char* to a unsigned char[]?
char* p = "bla bla";
unsigned char uch[WHATEVER_SIZE];
strcpy(reinterpret_cast<char*>(uch), p);
cout << uch << endl;
Rickard Andersson
Here is my card, contact me later!
UIN: 50302279
Sonork: 37318
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Yah, thats what I want. Thanks.
Mazy
"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope
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Hello,
I have an ".Emf" file on my harddisc,Which I would like to display to screen.
I used the "PlayEnhMetaFile" function for displaying the emf to screen,so far.But It has some problems displaying certain kind of EMF files.
Is there any other way by which I could display the Emf File other than using the "PlayEnhMetaFile" or "PlayMetaFile" functions.
Could any one show it with a piece of sample Code.
Thanks..
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This isn't exactly VC++ but I'm having difficulty with the InstallShield that comes bundled with it so...
At the end of installation, in the "Finished" dialog, I want to give the user the option to display the readme file and launch the program. I know how to add those the text for those options and read the results of the user's selection but how do I actually perform those operations?
In the InstallShield script, how do you display a text file in Notepad and launch the installed software?
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Anybody know how delete operator works over dynamically allocated 2-D array ? How is come to know about the bytes allocated ?
Vikram S
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The memory location is contiguous.
Kuphryn
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Yes, I meant generally arrays are allocated in continous memory locations.The issue is not that. How the delete operator comes to know about "How many bytes to be freed?"
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I would say it deallocates memory until there is a NULL.
Kuphryn
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hey in case of string it's quite okey. But what if i have array of intergers? and NULL =0 ?
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can anyone help me regarding enabling dhcp automatically.
The program should change the network properties to obtain ip address dynamically.
I tried dhcpsvc and iphlpapi but i cant make it to work. anyone???
Thanks in advance.
Conrad
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To enable DHCP:
HKEY hKey;
DWORD dwEnable = 1;
RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SYSTEM\CurrentControlSet\Services\{5AE5DC8F-790F-4DA3-B5EF-492139A60ED7}\Parameters\Tcpip", 0, KEY_WRITE, &hKey);
RegSetValueEx(hKey, "EnableDHCP", 0, REG_DWORD, &dwEnable, sizeof(dwEnable));
const char szTemp[] = "0.0.0.0";
RegSetValueEx(hKey, "IPAddress", 0, REG_MULTI_SZ, (const BYTE *) szTemp, sizeof(szTemp) + 1);
RegSetValueEx(hKey, "SubnetMask", 0, REG_MULTI_SZ, (const BYTE *) szTemp, sizeof(szTemp) + 1); The bold interface will need to be changed accordingly.
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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Thank you very much for the reply, after this how do i restart my network connection in order for the changes in the registry will take effect??
Another big thanks in advance.
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I'm not sure. See if IpReleaseAddress() and IpRenewAddress() do anything useful.
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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i have a program use dialog popup to get user info, but if i press ENTER instead of click on the okay button, it just act like i press the CANCEL button. How can i make it work with either click on OK button or press ENTER work the sameway?
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In Dialog editor set Default button style to the OK button.
Robert-Antonio
"A piece of paper is an ink-lined plane.
An inclined plane is slope up.
A slow pup is a lazy dog.
Q.E.D.: A piece of paper is a lazy dog."
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