#! /usr/bin/env python
#
def i4_and ( i, j ):

#*****************************************************************************80
#
## I4_AND calculates the AND of two I4's.
#
#  Discussion:
#
#    An I4 is an integer value.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    03 January 2016
#
#  Author:
#
#    John Burkardt
#
#  Parameters:
#
#    Input, integer I, J, two values whose AND is needed.
#
#    Output, integer VALUE, the AND of I and J.
#
  i1 = i
  j1 = j
  value = 0
  l = 1

  while ( i1 != 0 or j1 != 0 ):

    i2 = i1 // 2
    j2 = j1 // 2

    if ( ( i1 != 2 * i2 ) and ( j1 != 2 * j2 ) ):
      value = value + l

    i1 = i2
    j1 = j2
    l = 2 * l

  return value

def i4_and_test ( ):

#*****************************************************************************80
#
## I4_AND_TEST tests I4_AND.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    03 January 2016
#
#  Author:
#
#    John Burkardt
#
  import platform
  from i4_uniform_ab import i4_uniform_ab

  i4_lo = 0
  i4_hi = 100
  test_num = 10
  seed = 123456789

  print ( '' )
  print ( 'I4_AND_TEST' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  I4_AND returns the AND of two I4\'s.' )
  print ( '' )
  print ( '         I         J    I4_AND       I&J' )
  print ( '' )

  for test in range ( 0, test_num ):

    i, seed = i4_uniform_ab ( i4_lo, i4_hi, seed )
    j, seed = i4_uniform_ab ( i4_lo, i4_hi, seed )
    k = i4_and ( i, j )
    l = ( i & j )
    print ( '  %8d  %8d  %8d  %8d' % ( i, j, k, l ) )
#
#  Terminate.
#
  print ( '' )
  print ( 'I4_AND_TEST' )
  print ( '  Normal end of execution.' )
  return

if ( __name__ == '__main__' ):
  from timestamp import timestamp
  timestamp ( )
  i4_and_test ( )
  timestamp ( )