Jeffrey Altman <[EMAIL PROTECTED]> writes:
> > Richard Levitte - VMS Whacker <[EMAIL PROTECTED]> ,in message <20000202220
> The Visual C++ compiler does not compile a .c file with C++ semantics
> unless a special command line switch is thrown. stack.c is being
> compiled as a ANSI C program. The compiler is correct.
>
> void (*func)()
>
> means
>
> void (*func)(void)
>
> in ANSI C.
This is incorrect. In C, both ANSI and K&R, declaring a function
as
f();
is equivalent to
f(...);
In order to declare a function that takes no arguments in ANSI
C, you declare it as
f(void);
Without this behavior, it would not be possible to compile any
K&R C code with an ANSI compiler, which is obviously undesirable.
In C++, however, you declare a function that takes no arguments
using
f();
In fact, this is one of the major incompatibilities between
C++ and ANSI C.
>From the C++ FAQ:
--snip--
[6.10] Is C++ backward compatible with ANSI/ISO-C?
Almost.
C++ is as close as possible to compatible with C, but no closer. In
practice, the major difference is that C++ requires prototypes, and
that f() declares a function that takes no parameters (in C, f() is
the same as f(...)).
--snip--
-Ekr
--
[Eric Rescorla [EMAIL PROTECTED]]
PureTLS - free SSLv3/TLS software for Java
http://www.rtfm.com/puretls/
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