Mark: 12 revision(s)

2008-11-03T05:20:27Z

12 revision(s)

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===Task 1===
After much struggle, I moved the error function above the expect function and then changed "strcimp" to "strcmp", then added a main function. Now it compiles and i have no idea whats going on.

ParseTree* t = mkNode( '-', mkNode( '-', mkNode( 'a', 0 ), mkNode( 'b', 0 ), 0 ), 0);
prefix_tree(t);

After I referred to jhor's report and changed the line of code, I managed to print the tree by doing:

tree_to_graph( t, "tree.png");

Thanks jhor :):):)

===Task 2===
This took me quite a while, sometimes having to experiment with a bit of guess and check. But eventually I ended with the right result using this input:

ParseTree* t = mkNode( '?', mkNode( '>', mkNode( '+', mkNode( 'a', 0 ), mkNode( 'b', 0 ), 0 ), mkNode ( 'c', 0)),
mkNode('*', mkNode('z', 0), mkNode('+', mkNode( 'a', 0 ), mkNode( 'b', 0 ), 0), 0), mkNode( '?', mkNode( '=',
mkNode( 'a', 0 ), mkNode( '2', 0 ), 0), 0), mkNode( '-', mkNode( 'x', 0 ), mkNode( 'y', 0 ), 0), mkNode( '-', mkNode( 'y', 0 ),
mkNode( 'x', 0 ), 0), 0);
prefix_tree(t);

Output:
?(>(+(a b) c) *(z +(a b)) ?(=(a 2)) -(x y) -(y x))

===Task 3===
Printed the tree using the above method. I have to admit I did not go and draw my own tree because i could not be bothered. But I had an idea of what it would look like and it was pretty much what I thought it was, which is all good :)

<HTML>
<IMG SRC="http://www.geocities.com/braydondunnit/SOFTENG250/tree2.jpg">
</HTML>

===Task 4===

SE250:lab-8:gfun006 - Revision history

Mark: 12 revision(s)