SW006013 Microchip Technology, SW006013 Datasheet - Page 177

• 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.
log10
Description:
Include:
Prototype:
Argument:
Return Value:
Remarks:
Example:
Calculates the base-10 logarithm of a double precision floating-point
value.
<math.h>
double log10(double x);
x
Returns the base-10 logarithm of x. -inf is returned if x is 0 and NaN
is returned if x is a negative number.
A domain error occurs if x ≤ 0.
#include <math.h>
#include <stdio.h> /* for printf, perror */
#include <errno.h> /* for errno
int main(void)
{
}
Output:
The base-10 logarithm of 2.000000 is 0.301030
The base-10 logarithm of 0.000000 is -inf
Error: domain error
The base-10 logarithm of -2.000000 is nan
double x, y;
errno = 0;
x = 2.0;
y = log10 (x);
if (errno)
printf("The base-10 logarithm of %f is %f\n\n",
errno = 0;
x = 0.0;
y = log10 (x);
if (errno)
printf("The base-10 logarithm of %f is %f\n\n",
errno = 0;
x = -2.0;
y = log10 (x);
if (errno)
printf("The base-10 logarithm of %f is %f\n\n",
perror("Error");
perror("Error");
perror("Error");
any double precision floating-point positive number
x, y);
x, y);
x, y);
/* for log10
DS51456E-page 173
*/
*/