Re: convertion problem? from char* to unsigned char*?
On Sep 6, 5:07 pm, Barry <dhb2...@gmail.com> wrote:
HackerisNewKnight wrote:
1) First problem.
In my project i need to convert from char* to BYTE*( BYTE is unsigned
char),
is there any way to make the convertion?
BYTE* bite;
char* ch="help me, please";
bite = (BYTE*)ch; ? is this not right? what shoul i do here?
right, but not good.
static_cast<BYTE*>(ch);
That shouldn't compile; you need a reinterpret_cast here. Or
static_cast to void*, and then to BYTE*. And as Victor has
pointed out, ch should really be a char const*, so you'd also
need a const_cast.
But don't cast it to unsigned char*, if it's only a string
literal, it's useless. Or that's only your demo.
That would be my real question as well: why the conversion to
begin with? If you're dealing with text, char is the type, not
unsigned char, and while some legacy interfaces in the C library
do require converting an individual char to an unsigned char
(those in <ctype.h>), the need to convert char* to unsigned
char* should be exceedingly rare.
2) Second Problem
I defined array of WORD in c++;
WORD ar[7];
when how i can give it default value?
It depends, of course, on the type. He doesn't say what WORD
is.
no default value actually,
you may say, how to give initial value.
WORD ar[7] = {1,2,3,4,5,6,7};
or
WORD ar[] = {1,2,3,4,5,6,7};
default values must be NULL(or zero).
the value is random.
He can always write something like:
WORD ar[7] = {} ;
to get zero initialization for all of the elements.
i mean the arrays addres must be clean, must be NULL,
no such way of expression.
I'm not even sure what he means. The address of ar can't be
null, ever.
--
James Kanze (GABI Software) email:james.kanze@gmail.com
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