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# Untitled

a guest Feb 17th, 2017 56 Never
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1. route(a,d,1).
2. route(a,h,1).
3. route(a,b,1).
4. route(b,e,1).
5. route(b,c,1).
6. route(c,f,1).
7. route(c,e,1).
8. route(f,i,1).
9. route(f,h,1).
10. route(e,d,1).
11. route(d,g,1).
12. route(g,j,1).
13. route(g,l,1).
14. route(h,k,1).
15. route(i,k,1).
16. route(i,l,1).
17. route(j,m,1).
18. route(j,o,1).
19. route(k,n,1).
20. route(l,m,1).
21. route(l,o,1).
22. route(m,n,1).
23. route(n,o,1).
24.
25. ha_path(A, B) :-route(A, B, _), !.
26. ha_path(A, B) :-route(A, X, _), ha_path(X, B).
27.
28. %--------------------------------------------------------
29.
30. crossing(A, B,Visited,[B|Visited]) :-route(A, B,_).
31. crossing(A, B, Visited, Cam) :-route(A, C, _),
32.                              C == B,
33.                              + member(C, Visited),
34.                              crossing(C, B, [C|Visited], Cam).
35.
36. %------------------------------------------------
37.
38. %Find the ways and the cost between two nodes.
39.
40. path(A, B, Cam) :- crossing(A, B, [A], Cam).
41. paths(A, B, Lc) :-setof(Cam, path(A, B, Cam), Lc), !.
42. paths(_,_,[]).
43.
44. costPath(A, B, Cam, Cost) :-crossingCost(A, B, [A], Cam, Cost).
45. crossingCost(A, B, Visited,[B|Visited],Cost1) :-route(A, B, Cost1).
46. crossingCost(A, B, Visited, Cam, Cost) :-route(A, C, Cost2)
47.                                        ,C == B,+ member(C, Visited)
48.                      ,crossingCost(C, B, [C|Visited], Cam, CostResto)
49.                      ,Cost is Cost2 + CostResto.
50.
51. %----------------------------------------------------
52. %Find the paths and cost between two points.
53.
54. costPaths(A, B, Lc) :-
55. setof(Cam/Cost,costPath(A,B,Cam,Cost), Lc), !.
56. costPaths(_,_,[]).
57.
58. %---------------------------------------------------
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