h2 assignment 2017

1 Using the grammar G_integer• develop a leftmost derivation for the integer 4520. How many .steps are required for this derivation? In general, how many steps are required to derive an integer with an arbitrary number, say d, of Digits’?

2 Using the grammar G_imeger, develop a rightmost derivation for the integer 4520.

3 Develop a leftmost derivation for the Identifier value a2i, using the BNF syntax given in Figure 2.7.

4 Develop a rightmost derivation for the Identifier value a2i, using the BNF syntax given in

Figure 2.7.

5 Using the grammar of Figure 2.7, draw parse trees for each of the following:

(a) x = x + a -1;

(b) a = b * c I d;

(c) i = i + j * k – 3;

 

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