Microchip Technology XC8 Standard Compiler (Workstation) SW006021-1 SW006021-1 ユーザーズマニュアル
製品コード
SW006021-1
Library Functions
2012 Microchip Technology Inc.
DS52053B-page 333
FMOD
Synopsis
#include <math.h>
double fmod (double x, double y)
Description
The function
fmod
returns the remainder of
x
/
y
as a floating-point quantity.
Example
#include <math.h>
void
main (void)
{
double rem, x;
x = 12.34;
rem = fmod(x, 2.1);
}
Return Value
The floating-point remainder of x/y.
FREXP
Synopsis
#include <math.h>
double frexp (double f, int * p)
Description
The
frexp()
function breaks a floating-point number into a normalized fraction and an
integral power of 2. The integer is stored into the
int
object pointed to by
p
. Its return
value x is in the interval (0.5, 1.0) or zero, and
f
equals x times 2 raised to the power
stored in
*p
. If
f
is zero, both parts of the result are zero.
Example
#include <math.h>
#include <stdio.h>
void
main (void)
{
double f;
int i;
f = frexp(23456.34, &i);
printf("23456.34 = %f * 2^%d\n", f, i);
}
See Also
ldexp()