[eclipse-clp-users] Dynamic List/ Array

Dear CLP users,





I have the following array. I need to know if we are able to insert new variables in the array or have constraints on the existing variables.

M = []([](2, 3, 5, _), [](1, 4, 7, _)),





After inserting new variables, the output should be as follows for example.

M = []([](2, 3, 5, _, 34), [](1, 4, 7, _, 87)),

34 and 87 have no relation with existing data in array. They are just hard coded numbers.





The following is the way I need to add the constraint for the array.

M[1, 4] + M[2, 4] #= 10,



%Search API to solve the above constraint..



and provide solution as

M = []([](2, 3, 5, 2, 34), [](1, 4, 7, 8, 87)),



Please let me know if this is possible.



I have tried and understood about list/array.

Following are some of my samples. They have nothing to do with my question in particular.

:-lib(ic).

:- local struct( others(dvds, ratings) ).
:- local struct( see(others, stars) ).
:- local struct( book(author, title, year, publisher, cost, details, see) ).

top(M):-


  M = []([](2, 3, 5, _), [](1, 4, 7, _)),
  A is M[1, 2] + M[2, 3],
  % Reading from array
  writeln("Reading from array"),
  writeln(A),


  B #= 2,

  D is M[B, 2] + M[2, 3],
  % Reading from array with index as variable
  writeln("Reading from array with index as variable"),
  writeln(D),

  E is M[B, 2] * M[2, 3],
  % Reading from array with arithmetic operation
  writeln("Reading from array with arithmetic operation"),
  writeln(E),

  % Reading from array with arithmetic operation
  writeln("Reading from array with arithmetic operation"),
  writeln(M[B, 2]),

  M[1,4] #= 5,
  writeln("Writing to array"),
  writeln(M[1,4]),

  %writeln("Modifying existing array"),
  %writeln(M[1,1]),

  writeln("Reading from list  and inserting in a new list with arithmetic operation"),
 ( foreach(X,[1,2,3]), foreach(Y,List) do Y is X + 3 ),
  writeln(List),

   ( foreach(List,[1]), foreach(Y,List) do Y is X + 3 ),
  writeln(List).



Thanks and Regards,

Shrirang Edgaonkar









________________________________
From: Edgaonkar, Shrirang
Sent: 21 November 2014 10:05:36
To: eclipse-clp-users_at_...105...
Subject:


Dear Eclipse users group,



  I am working on solving constraints based on real numbers. Following is the sample code with all the constraints and locate API to find the solution.





:- module(test).
:- export hello/0.
:-lib(ic).

hello :-

  A :: -9223372036854775808.0__9223372036854775807.0,
  B :: -9223372036854775808.0__9223372036854775807.0,
  C :: -9223372036854775808.0__9223372036854775807.0,
  D :: -9223372036854775808.0__9223372036854775807.0,

  A $> B,
  B $< C,
  B + C $= 78,
  ((D - B) * 45) / A $= 123.35,

  locate([A, B, C, D], 1e-1, lin),

  writeln(a=[A]),
  writeln(b=[B]),
  writeln(c=[C]),
  writeln(d=[D]),
  writeln("%%%%%%%%%%%%%%%%%%%%%%%%%").







Following is the output but the output is always in ranges and I need solution that is a single set of real numbers. Please help me on how can I achieve this.





Output



a = [_436{16.8253096002924 .. 17.8537558438417}]
b = [_575{16.8253096002924 .. 17.8537558438417}]
c = [_714{60.1462441561583 .. 61.1746903997076}]
d = [_853{62.9453526935382 .. 66.7928843624611}]
%%%%%%%%%%%%%%%%%%%%%%%%%





Thanks and Regards,

Shrirang Edgaonkar

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