Mark: 24 revision(s)

2008-11-03T05:20:29Z

24 revision(s)

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= Lab 8 =

The Error() function needs to be put above the Exclude() function to get rid of an error. not sure why.

== Task 2 ==
Output required:
gcc parsetree.c -o parsetree && parsetree.exe
-(-(a b))

To get this output I looked at the code from our brief:
ParseTree* t = mkNode( ’+’, mkNode( ’1’, 0 ), mkNode( ’2’, 0 ), 0 );

+(1 2)

I then changed it to the following to get our required output:
ParseTree* t = mkNode( '-', mkNode( '-',mkNode( 'a',0 ),mkNode('b',0), 0),0 )

Now to using tree_to_graph(), here's the final code:
int main(){

ParseTree* t = mkNode( '-', mkNode( '-',mkNode( 'a',0 ),mkNode('b',0), 0),0 );
prefix_tree(t);
tree_to_graph(t, "1.jpg");
return 0;
}

Output is:
gcc parsetree.c -o parsetree && parsetree.exe
-(-(a b))
Compilation finished at Tue May 20 11:32:34

And this is the image produced:

<html> <img src ="http://geocities.com/racbhat13/Lab8-task2.jpg"></html>

==Task 3 & 4 ==
Holy ****, damn this is long. Neway getting to work now.

Ok after 30 minutes of working and re-working with trial and error, i finally got the code:
int Task3(){
ParseTree* t2 = mkNode('?',mkNode('>',mkNode('+',mkNode('a',0),mkNode('b',0),0),mkNode('c',0),0),mkNode('*',mkNode('z',0),
mkNode( '+',mkNode('y',0),mkNode('b',0),0),0),mkNode('?',mkNode('=',mkNode('a',0),mkNode('2',0),0),mkNode('-',mkNode ('x',0),
mkNode('y',0),0),mkNode('-',mkNode('y',0),mkNode('x',0),0),0),0);
prefix_tree(t2);

return 0;
}

Here's the Output:
gcc parsetree.c -o parsetree && parsetree.exe
?(>(+(a b) c) *(z +(y b)) ?(=(a 2) -(x y) -(y x)))
Compilation finished at Tue May 20 12:33:25

This was mind-boggling enough, couldn't figure out the diagram, but here's the image:
<html><img src = "http://www.geocities.com/racbhat13/lab8-task4.jpg"></html>

==Task 5==

Huh?!!!

==Task 6==

SE250:lab-8:rbha033 - Revision history

Mark: 24 revision(s)