func (q *Rat) Abs(x *Rat) *Rat {
x.doinit()
q.doinit()
C.mpq_abs(&q.i[0], &x.i[0])
return q
}
// Abs sets z to |x| (the absolute value of x) and returns z.
func (z *Rat) Abs(x *Rat) *Rat {
z.doinit()
C.mpq_abs(&z.i[0], &x.i[0])
return z
}
