f2c libF77 from netlib.att.com Jan 4 1994

[unix-history] / lib / libF77 / d_sign.c

#include "f2c.h"

#ifdef KR_headers
double d_sign(a,b) doublereal *a, *b;
#else
double d_sign(doublereal *a, doublereal *b)
#endif
{
double x;
x = (*a >= 0 ? *a : - *a);
return( *b >= 0 ? x : -x);
}