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2008-11-03T05:20:27Z

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Lab 8
I used the parsetree.c source file.

===Task 2===
Code
<pre>
int main() {
//ParseTree* t = mkNode( '-', mkNode( '+',0), mkNode( 'a',0 ), mkNode( 'b',0 ), mkNode('b', mkNode('n', 0),0), 0);
ParseTree* t = mkNode( '-', mkNode( '-', mkNode( 'a',0 ), mkNode( 'b',0 ),0),0);
prefix_tree(t);
printf("\n");
postfix_tree(t);
printf("\n");
tree_to_graph(t, "graph.jpg");
return 0;
}
</pre>
<pre>
pre -(-(a b))
post a b - -
</pre>

===Task 3===
Code (I am asking for trouble ...)
<pre>
int main() {
ParseTree* t = 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('x',0),mkNode('y',0),0),0),0);
prefix_tree(t);
printf("\n");
postfix_tree(t);
printf("\n");
tree_to_graph(t, "graph2.jpg");
return 0;
}
</pre>
<pre>
pre ?(>(+(a b) c) *(z +(y b)) ?(=(a 2) -(x y) -(x y)))
post a b + c > z y b + * a 2 = x y - x y - ? ?
</pre>

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Mark: 7 revision(s)