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HEAD
checked in for jerry
[unix-history]
/
usr
/
src
/
usr.bin
/
f77
/
libF77
/
cabs.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)cabs.c 5.1 %G%
*/
double
cabs
(
real
,
imag
)
double
real
,
imag
;
{
double
temp
,
sqrt
();
if
(
real
<
0
)
real
= -
real
;
if
(
imag
<
0
)
imag
= -
imag
;
if
(
imag
>
real
){
temp
=
real
;
real
=
imag
;
imag
=
temp
;
}
if
((
real
+
imag
) ==
real
)
return
(
real
);
temp
=
imag
/
real
;
temp
=
real
*
sqrt
(
1.0
+
temp
*
temp
);
/*overflow!!*/
return
(
temp
);
}