// output of ./demo/bits/radix-2i-demo.cc:
// Description:
//% Representation of purely real and imaginary numbers in radix(2*i).
//% The radix(2*i) representation for complex integers needs
//% one digit (i.e., two bits) after the point.

arg 1: 5 == ldn  [Number of bits]  default=5
 -32:  111.....    .1..1...........  = (-32,0)      ..11............  = (0,-32)
 -31:  111....1    .1..1........1..  = (-31,0)      ..11.......1..1.  = (0,-31)
 -30:  111...1.    .1..1.......1...  = (-30,0)      ..11.......1....  = (0,-30)
 -29:  111...11    .1..1.......11..  = (-29,0)      ..11......1...1.  = (0,-29)
 -28:  111..1..    .1..11..11......  = (-28,0)      ..11......1.....  = (0,-28)
 -27:  111..1.1    .1..11..11...1..  = (-27,0)      ..11......11..1.  = (0,-27)
 -26:  111..11.    .1..11..11..1...  = (-26,0)      ..11......11....  = (0,-26)
 -25:  111..111    .1..11..11..11..  = (-25,0)      ......11......1.  = (0,-25)
 -24:  111.1...    .1..11..1.......  = (-24,0)      ......11........  = (0,-24)
 -23:  111.1..1    .1..11..1....1..  = (-23,0)      ......11...1..1.  = (0,-23)
 -22:  111.1.1.    .1..11..1...1...  = (-22,0)      ......11...1....  = (0,-22)
 -21:  111.1.11    .1..11..1...11..  = (-21,0)      ......11..1...1.  = (0,-21)
 -20:  111.11..    .1..11...1......  = (-20,0)      ......11..1.....  = (0,-20)
 -19:  111.11.1    .1..11...1...1..  = (-19,0)      ......11..11..1.  = (0,-19)
 -18:  111.111.    .1..11...1..1...  = (-18,0)      ......11..11....  = (0,-18)
 -17:  111.1111    .1..11...1..11..  = (-17,0)      ......1.......1.  = (0,-17)
 -16:  1111....    .1..11..........  = (-16,0)      ......1.........  = (0,-16)
 -15:  1111...1    .1..11.......1..  = (-15,0)      ......1....1..1.  = (0,-15)
 -14:  1111..1.    .1..11......1...  = (-14,0)      ......1....1....  = (0,-14)
 -13:  1111..11    .1..11......11..  = (-13,0)      ......1...1...1.  = (0,-13)
 -12:  1111.1..    ........11......  = (-12,0)      ......1...1.....  = (0,-12)
 -11:  1111.1.1    ........11...1..  = (-11,0)      ......1...11..1.  = (0,-11)
 -10:  1111.11.    ........11..1...  = (-10,0)      ......1...11....  = (0,-10)
  -9:  1111.111    ........11..11..  =  (-9,0)      .......1......1.  =  (0,-9)
  -8:  11111...    ........1.......  =  (-8,0)      .......1........  =  (0,-8)
  -7:  11111..1    ........1....1..  =  (-7,0)      .......1...1..1.  =  (0,-7)
  -6:  11111.1.    ........1...1...  =  (-6,0)      .......1...1....  =  (0,-6)
  -5:  11111.11    ........1...11..  =  (-5,0)      .......1..1...1.  =  (0,-5)
  -4:  111111..    .........1......  =  (-4,0)      .......1..1.....  =  (0,-4)
  -3:  111111.1    .........1...1..  =  (-3,0)      .......1..11..1.  =  (0,-3)
  -2:  1111111.    .........1..1...  =  (-2,0)      .......1..11....  =  (0,-2)
  -1:  11111111    .........1..11..  =  (-1,0)      ..............1.  =  (0,-1)
   0:  ........    ................  =   (0,0)      ................  =   (0,0)
   1:  .......1    .............1..  =   (1,0)      ...........1..1.  =   (0,1)
   2:  ......1.    ............1...  =   (2,0)      ...........1....  =   (0,2)
   3:  ......11    ............11..  =   (3,0)      ..........1...1.  =   (0,3)
   4:  .....1..    .....1..11......  =   (4,0)      ..........1.....  =   (0,4)
   5:  .....1.1    .....1..11...1..  =   (5,0)      ..........11..1.  =   (0,5)
   6:  .....11.    .....1..11..1...  =   (6,0)      ..........11....  =   (0,6)
   7:  .....111    .....1..11..11..  =   (7,0)      ...1..11......1.  =   (0,7)
   8:  ....1...    .....1..1.......  =   (8,0)      ...1..11........  =   (0,8)
   9:  ....1..1    .....1..1....1..  =   (9,0)      ...1..11...1..1.  =   (0,9)
  10:  ....1.1.    .....1..1...1...  =  (10,0)      ...1..11...1....  =  (0,10)
  11:  ....1.11    .....1..1...11..  =  (11,0)      ...1..11..1...1.  =  (0,11)
  12:  ....11..    .....1...1......  =  (12,0)      ...1..11..1.....  =  (0,12)
  13:  ....11.1    .....1...1...1..  =  (13,0)      ...1..11..11..1.  =  (0,13)
  14:  ....111.    .....1...1..1...  =  (14,0)      ...1..11..11....  =  (0,14)
  15:  ....1111    .....1...1..11..  =  (15,0)      ...1..1.......1.  =  (0,15)
  16:  ...1....    .....1..........  =  (16,0)      ...1..1.........  =  (0,16)
  17:  ...1...1    .....1.......1..  =  (17,0)      ...1..1....1..1.  =  (0,17)
  18:  ...1..1.    .....1......1...  =  (18,0)      ...1..1....1....  =  (0,18)
  19:  ...1..11    .....1......11..  =  (19,0)      ...1..1...1...1.  =  (0,19)
  20:  ...1.1..    ....1...11......  =  (20,0)      ...1..1...1.....  =  (0,20)
  21:  ...1.1.1    ....1...11...1..  =  (21,0)      ...1..1...11..1.  =  (0,21)
  22:  ...1.11.    ....1...11..1...  =  (22,0)      ...1..1...11....  =  (0,22)
  23:  ...1.111    ....1...11..11..  =  (23,0)      ...1...1......1.  =  (0,23)
  24:  ...11...    ....1...1.......  =  (24,0)      ...1...1........  =  (0,24)
  25:  ...11..1    ....1...1....1..  =  (25,0)      ...1...1...1..1.  =  (0,25)
  26:  ...11.1.    ....1...1...1...  =  (26,0)      ...1...1...1....  =  (0,26)
  27:  ...11.11    ....1...1...11..  =  (27,0)      ...1...1..1...1.  =  (0,27)
  28:  ...111..    ....1....1......  =  (28,0)      ...1...1..1.....  =  (0,28)
  29:  ...111.1    ....1....1...1..  =  (29,0)      ...1...1..11..1.  =  (0,29)
  30:  ...1111.    ....1....1..1...  =  (30,0)      ...1...1..11....  =  (0,30)
  31:  ...11111    ....1....1..11..  =  (31,0)      ...1..........1.  =  (0,31)