3. Job syntax tree, phrases, phrases directly Handles

1. Known grammar:

S->a|^|(T)

T->T,S|S

Analysis sentence (T, (^, a)), find all phrases, phrases and handle directly.

 

 

 

2. The context-free grammar structure description language:

｛anbn|n>=0｝

｛ambn|m>=n>=0｝

The if statement