Rob Thorpe wrote:
> The compiler
> relys entirely on the types of the variables to know how to correctly
> operate on the values. The values themselves have no type information
> associated with them.
int x = (int) (20.5 / 3);
What machine code operations does the "/" there invoke? Integer
division, or floating point division? How did the variables involved in
the expression affect that?
>>Casting in C takes values of one type to values of another type.
> No it doesn't. Casting reinterprets a value of one type as a value of
> another type.
No it doesn't.
int x = (int) 20.5;
There's no point at which bits from the floating point representation
appear in the variable x.
int * x = (int *) 0;
There's nothing that indicates all the bits of "x" are zero, and indeed
in some hardware configurations they aren't.
--
Darren New / San Diego, CA, USA (PST)
My Bath Fu is strong, as I have
studied under the Showerin' Monks.
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