gw_q2eta.f90

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!> \file gw_q2eta.f90  Compute the symmetric mass ratio eta from the asymmetric mass ratio q

!   
!   GWtool:       Simple tools for working with gravitational waves
!                 http://gwtool.sourceforge.net/
!   
!   
!   Copyright 2007-2013 AstroFloyd - astrofloyd.org
!   
!   
!   This file is part of GWtool.
!   
!   GWtool is free software: you can redistribute it and/or modify
!   it under the terms of the GNU General Public License as published by
!   the Free Software Foundation, either version 3 of the License, or
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!***********************************************************************************************************************************
!> \brief  Compute the symmetric mass ratio eta from the asymmetric mass ratio q

program gw_q2eta
  use sufr_kinds, only: double
  use sufr_system, only: syntax_quit
  
  implicit none
  real(double) :: q, eta
  character :: tmpstr*(99)
  
  if(command_argument_count().eq.1) then
     call get_command_argument(1,tmpstr)
     read(tmpstr,*) q
  else
     call syntax_quit('<q>', 0, 'This program converts the asymmetric mass ratio q to the asymmetric mass ratio eta')
  end if
  
  eta = q/(1.d0+q)**2
  
  write(6,'(/,2x,A,F11.8,/)') 'Eta:', eta
  
end program gw_q2eta
!***********************************************************************************************************************************