On Mar 8, 2010, at 3:54 PM, Clark Cox wrote:
> For types smaller than int, there is no need to explicitly cast; the
> standard guarantees that such values are converted to int (or unsigned
> int) implicitly. In fact, the 'h' and 'hh' modifiers are completely
> redundant and are ignored when passed to printf-like functions
... unless you're printing signed variables using %x, for one.
% cat test.c
#include <stdio.h>
int main() {
short x = -1;
printf("hx 0x%hx\n", x);
printf("x 0x%x\n", x);
return 0;
}
% cc test.c
% ./a.out
hx 0xffff
x 0xffffffff
(Hint: Implicit promotion to int, and sign extension.)
--
Greg Parker [email protected] Runtime Wrangler
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