def get_cvals(ncon)
      pos = Const::KSIZE * Const::RECL
      recl = 8

      begin
        return (0..ncon - 1).map do |i|
          File.binread(@bin_path, recl, pos + recl * i).unpack("d*")[0]
        end
      rescue => e
        raise
      end
    end
def get_cvals(ncon)
      pos = Const::KSIZE * Const::RECL
      recl = 8

      begin
        return (0..ncon - 1).map do |i|
          File.binread(@bin_path, recl, pos + recl * i).unpack("d*")[0]
        end
      rescue => e
        raise
      end
    end
=========================================================================
 CVAL

 @param:  NCON
 @return: Array of CVAL
=========================================================================