#! /usr/bin/env python
#
def dvec_complementx ( n, dvec1 ):

#*****************************************************************************80
#
## DVEC_COMPLEMENTX computes the ten's complement of a DVEC.
#
#  Discussion:
#
#    A DVEC is an integer vector of decimal digits, intended to
#    represent an integer.  DVEC(1) is the units digit, DVEC(N-1)
#    is the coefficient of 10**(N-2), and DVEC(N) contains sign
#    information.  It is 0 if the number is positive, and 1 if
#    the number is negative.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    28 May 2015
#
#  Author:
#
#    John Burkardt
#
#  Parameters:
#
#    Input, integer N, the length of the vectors.
#
#    Input, integer DVEC1(N), the vector to be complemented.
#
#    Output, integer DVEC2(N), the ten's complemented vector.
#
  import numpy as np
  from dvec_add import dvec_add

  base = 10

  dvec3 = np.zeros ( n, dtype = np.int32 )

  for i in range ( 0, n ):
    dvec3[i] = ( base - 1 ) - dvec1[i]

  dvec4 = np.zeros ( n, dtype = np.int32 )
  dvec4[0] = 1

  dvec2 = dvec_add ( n, dvec3, dvec4 )

  return dvec2

def dvec_complementx_test ( ):

#*****************************************************************************80
#
## DVEC_COMPLEMENTX_TEST tests DVEC_COMPLEMENTX;
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    28 May 2015
#
#  Author:
#
#    John Burkardt
#
  import platform
  from dvec_to_i4 import dvec_to_i4
  from dvec_print import dvec_print
  from i4_to_dvec import i4_to_dvec
  from i4_uniform_ab import i4_uniform_ab

  n = 10
  seed = 123456789
  test_num = 5

  print ( '' )
  print ( 'DVEC_COMPLEMENTX_TEST' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  DVEC_COMPLEMENTX returns the ten\'s complement' )
  print ( '  of a (signed) decimal vector;' )

  for test in range ( 0, test_num ):
    
    i, seed = i4_uniform_ab ( -100, 100, seed )

    dvec1 = i4_to_dvec ( i, n )

    dvec2 = dvec_complementx ( n, dvec1 )

    j = dvec_to_i4 ( n, dvec2 )

    print ( '' )
    print ( '  I = %8d' % ( i ) )
    print ( '  J = %8d' % ( j ) )

    dvec_print ( n, dvec1, '' )
    dvec_print ( n, dvec2, '' )
#
#  Terminate.
#
  print ( '' )
  print ( 'DVEC_COMPLEMENTX_TEST:' )
  print ( '  Normal end of execution.' )
  return

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