Casting between signed/unsigned pointer types.

[Jason Heyes]

Is this the right idea?

char *ptr;
unsigned char *uptr = reinterpret_cast<unsigned char *>(ptr);

What about when I start with a char only?

char ch;
unsigned char *uptr = &static_cast<unsigned char>(ch);

Or should I use the reinterpret_cast again?

char ch;
unsigned char *uptr = reinterpret_cast<unsigned char *>(&ch);

I hope my question is clear. Thanks.

[Ruslan Abdikeev]

"Jason Heyes" <ja********@optusnet.com.au> wrote in message
news:42**********************@news.optusnet.com.au ...

Is this the right idea?
char *ptr;
unsigned char *uptr = reinterpret_cast<unsigned char *>(ptr); It will work.
What about when I start with a char only?
char ch;
unsigned char *uptr = &static_cast<unsigned char>(ch); No way. static_cast returns an r-value here, so you cannot take an address.
Or should I use the reinterpret_cast again?
char ch;
unsigned char *uptr = reinterpret_cast<unsigned char *>(&ch);

This will work.

Hope it helps,
Ruslan Abdikeev.

[Jason Heyes]

"Ruslan Abdikeev" <ru*************@hotmail.com> wrote in message
news:37*************@individual.net...

"Jason Heyes" <ja********@optusnet.com.au> wrote in message
news:42**********************@news.optusnet.com.au ...

Is this the right idea?
char *ptr;
unsigned char *uptr = reinterpret_cast<unsigned char *>(ptr);

It will work.

What about when I start with a char only?
char ch;
unsigned char *uptr = &static_cast<unsigned char>(ch);

No way. static_cast returns an r-value here, so you cannot take an
address.

Or should I use the reinterpret_cast again?
char ch;
unsigned char *uptr = reinterpret_cast<unsigned char *>(&ch);

This will work.

Hope it helps,
Ruslan Abdikeev.

Ok I get it. Thanks.