const LPSTR

tinyabs

CBuilder Developer

const LPSTR

2005-07-30 04:14:17 AM
cppbuilder47
Why does the following code compiles?
strcpy((const LPSTR) hwKey, hwKey);
while
strcpy((const char *) hwKey, hwKey);
does not.

Muzaffar Mahkamov

CBuilder Developer

2005-07-30 05:28:59 PM

Re:const LPSTR

tinyabs wrote:

Quote

Why does the following code compiles?

strcpy((const LPSTR) hwKey, hwKey);
while
strcpy((const char *) hwKey, hwKey);
does not.

May be because LPSTR is a typedef and C++ is a strictly typed language?

LPSTR is declared this way (MSDN):
typedef CHAR *LPSTR;

maeder

CBuilder Developer

2005-07-31 01:38:07 AM

Re:const LPSTR

Muzaffar Mahkamov < XXXX@XXXXX.COM >writes:

Quote

tinyabs wrote:
>Why does the following code compiles?
>strcpy((const LPSTR) hwKey, hwKey);
>while
>strcpy((const char *) hwKey, hwKey);
>does not.
>
May be because LPSTR is a typedef and C++ is a strictly typed language?

LPSTR is declared this way (MSDN):

typedef CHAR *LPSTR;
Which means that

const LPSTR
is a synonym to
CHAR * const LPSTR
, i.e. the pointer is const, whereas in const char *, the char objects
are const.

{smallsort}