diff options
| -rw-r--r-- | agent.prolog | 61 |
1 files changed, 59 insertions, 2 deletions
diff --git a/agent.prolog b/agent.prolog index ba59a43..a0c4289 100644 --- a/agent.prolog +++ b/agent.prolog @@ -1,5 +1,5 @@ -:- module(agent, [init, look/0, move/1, take/1]). +:- module(agent, [init, look/0, move/1, take/1, shoot/1]). :- consult('parser.prolog'). @@ -59,7 +59,8 @@ move(Direction) :- retract(here(Location)), asserta(here(New)), join(['You move to the ',Direction,' .\n\n'],W), - write(W), !. + write(W), + checkHazards, !. take(Item) :- @@ -71,6 +72,23 @@ take(Item) :- write('Taken.\n\n'), !. +shoot(Direction) :- + here(Location), + connects(Location, Target, Direction), + wumpusAt(Target), + write('You hear an unearthly scream.\n\n'), + retract(wumpusAt(Target)), + win. + + +shoot(Direction) :- + here(Location), + connects(Location, Target, Direction), + not(wumpusAt(Target)), + write('Thunk. Missed.\n\n'), + moveWumpus. + + % letting the player know what's going on @@ -122,6 +140,45 @@ writeExits(Location) :- +% modifying things and checking the ramifications + +moveWumpus :- + wumpusAt(Old), + findall(X, connects(Old,X,_), PossibleNews), + random_member(New, PossibleNews), + retract(wumpusAt(Old)), + asserta(wumpusAt(New)), + checkWumpus. + + +checkHazards :- + checkWumpus. + + +checkWumpus :- + here(Location), + wumpusAt(Location), + lose(eaten). +checkWumpus :- true. + + + + +% winning, losing, and otherwise + +win :- + write('*** YOU WIN ***\n'), + halt(0). + + +lose(eaten) :- + write('You have been eaten by the wumpus.\n'), + write('*** GAME OVER ***\n'), + halt(0). + + + + % miscellaneous clauses somethingAt(X) :- current_predicate(here/1), here(X). |