pointer operation

[swapnil_paranja]

i have two pointers

wchat_t *str and wchar_t * etr

srt is pointing to wchar_t type data like 11.22.11.22
and etr is also pointing to simlilar data. 12.32.14.32

Now i want to have a pointer which points to the (combined) data of both the pointers like this
wchar_t *stretr it should point to the 11.22.11.22 12.32.14.32

please tell me how to get this pointer?what operations are required on str and etr?

somthing like this is possible?
wchar_t join = str +' '+etr;
then make stretr points to join?

[drkybelk]

Hi,

wchar_t join = str +' '+etr;
what you are trying to do here is adding memory addresses.
str points to the memory address where the data 11.22.11.22 lies.
Similarly etr points to a memory address. What you try to do in the statement
wchar_t* join = str +' '+etr;
is to assign a memory address to 'join' which is the sum of the addresses of str and etr plus the ASCII value of the character space ' '. That's not what you want.
Try functions like wstrcat or wsprintf to do what you want or better yet: try to use
the STL. There is a class "string", that probably does what you want.
But I believe the string - class is based char rather than wchar_t, if this is a concern...

#include <string>
using namespace std;
int main()
{
string str1 = "11.22.33.44";
string str2 = "55.66.77.88";
string str3 = str1 + string(" ") + str2; // str3 == "11.22.33.44 55.66.77.88"

return 0;
}


Regards,

Dieter

[Danny]

somthing like this is possible?
wchar_t join = str +' '+etr;
then make stretr points to join?

It's possible but not with bare pointers. Use std::wstring objects for this purpose:

#include <string> //mind the header's name: not string.h!

using std::wstring;

wstring joined= wstring(str)+wstring(etr);

If you need to extract the address of the joined string, use

const wchar_t *ptr = joined.data();