SW006013 Microchip Technology, SW006013 Datasheet - Page 164

• Manufacturer Part Number: SW006013
• Description: MPLAB C Compiler For DsPIC DSCs
• Manufacturer: Microchip Technology
• Series: DsPIC30F/33Fr
• Type: MPLAB® C Compilerr

Specifications of SW006013

• Supported Families: DsPIC30F, DsPIC33F
• Core Architecture: DsPIC
• Kit Contents: Software And Docs
• Mcu Supported Families: DsPIC30F And DsPIC33F
• Tool Function: Compiler
• Tool Type: Compiler
• Processor Series: dsPIC
• Lead Free Status / RoHS Status: na
• For Use With/related Products: dSPIC DSCs
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

DS51456E-page 160
expf
Description:
Include:
Prototype:
Argument:
Return Value:
Remarks:
Example:
Calculates the exponential function of x (e raised to the power x where
x is a single precision floating-point value).
<math.h>
float expf (float x);
x
Returns the exponential of x. On an overflow, expf returns inf and on
an underflow exp returns 0.
A range error occurs if the magnitude of x is too large.
#include <math.h>
#include <stdio.h> /* for printf, perror */
#include <errno.h> /* for errno
int main(void)
{
}
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
float x, y;
errno = 0;
x = 1.0F;
y = expf (x);
if (errno)
printf("The exponential of %f is %f\n\n", x, y);
errno = 0;
x = 1.0E3F;
y = expf (x);
if (errno)
printf("The exponential of %f is %f\n\n", x, y);
errno = 0;
x = -1.0E3F;
y = expf (x);
if (errno)
printf("The exponential of %f is %f\n\n", x, y);
perror("Error");
perror("Error");
perror("Error");
floating-point value for which to return the exponential
/* for expf
© 2008 Microchip Technology Inc.
*/
*/