Assignment 4

Hi

Is anybody else having trouble with Assignment 4? In particular Quesion 3 & 4? I have typed out the programs using all the procedures defined in the book, but I am not getting the results I need.

Q3 seems to run forever, and Q4 just gives me an answer of "no"

Don't know what to do, i have checked the programs thoroughly and proof read it about 5 times.

Just wondering if anybody else is having this problem... I have a feeling its just me...

um... question 3 is not supposed to be a program.. its supposed to be a paper question like q2.

not going to say much about q4 cause I got lazy and copied last years answer just so I could submit something - but that also causes an error after outputing two answers

What i wanted to do for q3 was type out program and run the query on it, and then the plan it outputs is only what i need. But my program is running forever and ever and ever! Anyways, i will just figure it out without typing out the program, because i think it is stuck in a loop somewhere.

As for q4, i don't have much time to work on this, so i am just going to submit my program the way it is.

And q2 is taking me so long to trace... going to have to cut a few corners there.

but q2 and q3 are similar... its that planning stuff. Something along the line of:

1) Initial state:
[clear(2), clear(4), clear(b), clear(c), on(c, a), on(a,1), on(b,3)]

Goal state:
[on(c,1)]

Find an action that achieves on(c,1):
Move(c, From, 1) for any From. Look at the can function to find a pre-condition for this action:
[clear(c), clear(1), on(c, From)]
clear(1) is not in the initial state so this becomes the new goal.