ack/lang/fortran/lib/libF77/d_sign.c

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1991-10-07 16:59:33 +00:00
#include "f2c.h"
double d_sign(a,b)
doublereal *a, *b;
{
double x;
x = (*a >= 0 ? *a : - *a);
return( *b >= 0 ? x : -x);
}