Hi everybody, 

I want to know if any one of you knows the solution for the exercise
5.17 page 200 & execises 7.39 page 288 in the book "essentials of
programming languages second edition. "

thanks

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Request for Question Clarification by answerguru-ga on 03 Aug 2003 12:39 PDT

Hello,

It would be helpful if you could post the question text :)

answerguru-ga

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Clarification of Question by eagle2000-ga on 03 Aug 2003 13:01 PDT

5.17- Extend The syntax of our language so that each methoddeclaration
requires one of the modifiers public,protected, or private. A public
method may be called from anywhere. A protected method may be called
only from the class in which it is declared or one of its subclasses.
A private method may be called only from its host class.

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7.39- Modify the thread package to include thread identifiers. to do
this, change the grammar of spawn expressions to be

<expression> ::= spawn (<identifier>) <expression>

each new threadgets a fresh number (its thread identifier). when the
child thread is spawned, it receives its number as the binding of the
identifier. The child's number is returned to the parent as the value
of the spawn expression. Instrument the interpreter to trace the
creation of thread identifiers. Check to see that the ready queue
contains at most one thread for each thread identifier. what should be
done about the thread identifier of the original program?


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all the code could be found in this adress:
http://www.cs.indiana.edu/eopl/

thx

psss: very urgent