CSCI618 Prolog Project

Semester project for CSCI658 using prolog with nlp.

Instructions

Place both top_down.pl and bottom_up.pl into the same directory. Using a terminal navigate to the directory with both Prolog files.

To switch between .pl databases type in halt. then Enter. Then follow the provided instructions.

top_down.pl

1. Type swipl then select Enter to enter the SWI-Prolog interpreter.
2. Once in the SWI-Prolog interpreter type in [top_down]. then press Enter to load the top_down database.
3. Type in re(X,[]). then press Enter to view all valid strings. Select the ; key to go to the next string if one exists.
4. To check a string input type in re([A,B,C,...,n],[]). where A,B,C,n are all characters then press Enter.
5. A return of true will occur if the string is valid.

bottom_up.pl

1. Type swipl then select Enter to enter the SWI-Prolog interpreter.
2. Once in the SWI-Prolog interpreter type in op(255,xfx,--->). then press Enter to define the new operator.
3. Next type in [bottom_up]. then press Enter to load the top_down database.
4. To test a string type in post_order_traverse([A,B,C,...,n]). where A,B,C,n are all characters then press Enter.
5. A return of true will occur if the string is valid.
6. To view the trace of the program as it executes type trace then press Enter.
7. To test a string type in post_order_traverse([A,B,C,...,n]). where A,B,C,n are all characters then press Enter.
8. A return of true will occur if the string is valid.