SW006013 Microchip Technology, SW006013 Datasheet - Page 171

• 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.
frexp
Description:
Include:
Prototype:
Arguments:
Return Value:
Remarks:
Example:
Gets the fraction and the exponent of a double precision floating-point
number.
<math.h>
double frexp (double x, int *exp);
x
exp pointer to a stored integer exponent
Returns the fraction, exp points to the exponent. If x is 0, the function
returns 0 for both the fraction and exponent.
The absolute value of the fraction is in the range of 1/2 (inclusive) to 1
(exclusive). No domain or range error will occur.
#include <math.h>
#include <stdio.h> /* for printf */
int main(void)
{
}
Output:
For frexp of 50.000000
For frexp of -2.500000
For frexp of 0.000000
double x,y;
int n;
x = 50.0;
y = frexp (x, &n);
printf("For frexp of %f\n the fraction is %f\n ",
printf("
x = -2.5;
y = frexp (x, &n);
printf("For frexp of %f\n the fraction is %f\n ",
printf("
x = 0.0;
y = frexp (x, &n);
printf("For frexp of %f\n the fraction is %f\n ",
printf("
the fraction is 0.781250
the fraction is -0.625000
the fraction is 0.000000
and the exponent is 6
and the exponent is 2
and the exponent is 0
floating-point value for which to return the fraction and exponent
x, y);
x, y);
x, y);
and the exponent is %d\n\n", n);
and the exponent is %d\n\n", n);
and the exponent is %d\n\n", n);
/* for frexp
*/
DS51456E-page 167