INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Statements and Expressions as structurs in Prolog

Statements and Expressions as structurs in Prolog

(OP)
Anybody out there who can help me?

The following grammatic discribes a small language for Statements and Expressions as structurs in Prolog.


Statement::
    statement(if, Predicat, Statement) |
    statement(while, Predicat, Statement) |
    statement(assign, Describ, Expression)
    statement(print, Expression) |
    statement(sequence, Statement, Statement).
Predicat::
    Expression.
Expression ::
    Describ |
    Zahl |
    expression(add, Expression, Expression)|
    expression(sub, Expression, Expression)|
    expression(mult, Expression, Expression).

mit atom(Describ) und number(Number).

Example for an expression: expression(add,x,1)
Example for an statement: statement(assign,x,2.2222).


I have to implement the following predicats:

exec(Statement, Variablelist, NewVariablelist)
 
eval(Expression, Value, Variablelist)

they should interpret. Statements and Expressions.


there are 5 different ones of Statements and Expressions:

 

 statement(if, 2, statement(print,2))
describes the tree:
 
                        statement
                      /     |      \
                    if      2      statement
                                     |       \
                                   print      2

please help me!


thanx, Andreas


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close