s1 grammar exercise 在 S1 & S2 : |Present Simple & Continuous| Exercise 05 تـمـاريـن ... 的評價 ... <看更多>
s1 grammar exercise 在 dragon-book-exercise-answers/2.2.md at master - GitHub 的評價 Show how the string aa+a* can be generated by this grammar. ... S -> 0 S 1 | 0 1; S -> + S S | - S S | a; S -> S ( S ) S | ε; S -> a S b S | b S a S | ε ... ... <看更多>
