SW006014 Microchip Technology, SW006014 Datasheet - Page 157
SW006014
Manufacturer Part Number
SW006014
Description
C COMPILER MPLAB FOR PIC24 MCU
Manufacturer
Microchip Technology
Type
MPLAB® C Compilerr
Series
PIC24r
Datasheet
1.SW006014.pdf
(246 pages)
Specifications of SW006014
Supported Families
PIC24
Core Architecture
PIC
Kit Contents
Software And Docs
Mcu Supported Families
PIC24
Tool Function
Compiler
Tool Type
Compiler
Processor Series
PIC24
Lead Free Status / RoHS Status
Not applicable / Not applicable
For Use With/related Products
PIC24
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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© 2008 Microchip Technology Inc.
atan2f
Description:
Include:
Prototype:
Arguments:
Return Value:
Remarks:
Example:
Calculates the trigonometric arc tangent function of y/x.
<math.h>
float atan2f (float y, float x);
y
x
Returns the arc tangent in radians in the range of -pi to pi with the
quadrant determined by the signs of both parameters.
A domain error occurs if both x and y are zero or both x and y are
+/- infinity.
#include <math.h>
#include <stdio.h> /* for printf, perror */
#include <errno.h> /* for errno
int main(void)
{
}
Output:
The arctangent of 2.000000/0.000000 is 1.570796
The arctangent of 0.000000/-1.000000 is 3.141593
Error: domain error
The arctangent of 0.000000/0.000000 is nan
float x, y, z;
errno = 0;
x = 2.0F;
y = 0.0F;
z = atan2f (y, x);
if (errno)
printf("The arctangent of %f/%f is %f\n\n",
errno = 0;
x = 0.0F;
y = -1.0F;
z = atan2f (y, x);
if (errno)
printf("The arctangent of %f/%f is %f\n\n",
errno = 0;
x = 0.0F;
y = 0.0F;
z = atan2f (y, x);
if (errno)
printf("The arctangent of %f/%f is %f\n\n",
perror("Error");
perror("Error");
perror("Error");
y, x, z);
y, x, z);
y, x, z);
y value for which to return the arc tangent
x value for which to return the arc tangent
/* for atan2f
DS51456E-page 153
*/
*/
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