o_195h4n6al16jb186b1b2qs7fgssa.pdf

errno = 0;
x = -1E3;
y = exp (x);
if (errno)
perror("Error");
printf("The exponential of %f is %f\n\n", x, y);
}
Output:
The exponential of 1.000000 is 2.718282
Error: range error
The exponential of 1000.000000 is inf
Error: range error
The exponential of -1000.000000 is 0.000000
dsPIC
®
Language Tools Libraries
DS51456B-page 338
expf
2004 Microchip Technology Inc.
Description: Calculates the exponential function of x (e raised to the power x
where
x is a single precision floating point value).
Include:
Prototype: float expf (float x);
Argument: x floating point value for which to return the exponential
Return Value: Returns the exponential of x. On an overflow, expfreturns infand
on
an underflow exp returns 0.
Remarks: A range error occurs if the magnitude of xis too large.
Example: #include /* for expf */
#include /* for printf, perror */
#include /* for errno */
int main(void)
{
float x, y;
errno = 0;
x = 1.0F;
y = expf (x);
if (errno)
perror("Error");
printf("The exponential of %f is %f\n\n", x, y);
nổi x [8] = {2.0F, 1.75F, 1.5F, 1.25F,
-2.0F, -1.75F, -1.5F, -1.25F};
nổi y;
int i;
for (i = 0; i