hypot.3m

unix v7是最后一个广泛发布的研究型UNIX版本

.TH HYPOT 3M 
.SH NAME
hypot, cabs \- euclidean distance
.SH SYNOPSIS
.B #include <math.h>
.PP
.B double hypot(x, y)
.br
.B double x, y;
.PP
.B double cabs(z)
.br
.B struct { double x, y;} z;
.SH DESCRIPTION
.I Hypot
and
.I cabs
return
.PP
.IP "" 15n
sqrt(x*x + y*y),
.LP
taking precautions against unwarranted overflows.
.SH SEE ALSO
exp(3) for
.I sqrt