cabs(3M)

NAME | SYNOPSIS | API RESTRICTIONS | DESCRIPTION | ERRORS (due to Round-off) | ATTRIBUTES | SEE ALSO

NAME

hypot, cabs- euclidean distance and complex absolute value functions

SYNOPSIS

$(NUCLEUS_DIR)/lib/libm.a
#include <math.h>

double hypot(double x, double y);
double cabs(struct {double x ; double y ;} z ;);

API RESTRICTIONS

The function or functions documented here may not be used safely in all application contexts with all APIs provided in the ChorusOS 5.0 product.

See API(5FEA) for details.

DESCRIPTION

The hypot() and cabs() functions compute the square root of (x*x+y*y) in such a way that underflow will not occur, and overflow occurs only if the final result justifies it.

For all values of v , including NaN :

hypot [infin ] v() = hypot v [infin ]() = +Infinity

ERRORS (due to Round-off)

Less than 0.97 ulp s ( U nit in the L ast P lace). Consequently, hypot 5.0 12.0() = 13.0 exactly. In general, hypot() and cabs() return an integer whenever an integer is expected.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Evolving

SEE ALSO

Intro(3M) , sqrt(3M)

ChorusOS 5.0  Last Revised December 2001

NAME | SYNOPSIS | API RESTRICTIONS | DESCRIPTION | ERRORS (due to Round-off) | ATTRIBUTES | SEE ALSO