Question

2 + 3 月
2 c3i_92
(Q3 + 1) (231)
5
5
n
m+6=2m+2
9
9
7
(25)​

Answer 1

Answer:

P60. Exercises for Section 2.3 Exercise 2.3.1: Construct a syntax-directed translation scheme that translates arithmetic expressions from infix notation into prefix notation in which an operator appears before its operands; e.g. , -xy is the prefix notation for x - y. Give annotated parse trees for the inputs 9- 5+2 and 9-5*2. P68. Exercises for Section 2.4 Exercise 2.4.1 : Construct recursive-descent parsers, starting with the following grammars: a) S+SS-SS a