SW006013 Microchip Technology, SW006013 Datasheet - Page 183

• 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

© 2008 Microchip Technology Inc.
pow (Continued)
powf
Description:
Include:
Prototype:
Arguments:
Return Value:
Remarks:
Example:
Output:
-2.000000 raised to 3.000000 is -8.000000
Calculates x raised to the power y.
<math.h>
float powf(float x, float y);
x
y
Returns x raised to the power y (x^y).
If y is 0, powf returns 1. If x is 0.0 and y is less than 0 powf returns
inf and a domain error occurs. If the result overflows or underflows, a
range error occurs.
#include <math.h>
#include <stdio.h> /* for printf, perror */
#include <errno.h> /* for errno
int main(void)
{
}
3.000000 raised to -0.500000 is 0.577350
4.000000 raised to 0.000000 is 1.000000
Error: domain error
0.000000 raised to -3.000000 is inf
float x,y,z;
errno = 0;
x = -2.0F;
y = 3.0F;
z = powf (x, y);
if (errno)
printf("%f raised to %f is %f\n\n ", x, y, z);
errno = 0;
x = 3.0F;
y = -0.5F;
z = powf (x, y);
if (errno)
printf("%f raised to %f is %f\n\n ", x, y, z);
errno = 0;
x = 0.0F;
y = -3.0F;
z = powf (x, y);
if (errno)
printf("%f raised to %f is %f\n\n ", x, y, z);
perror("Error");
perror("Error");
perror("Error");
base
exponent
/* for powf
DS51456E-page 179
*/
*/