Lab1.
Lab2.
test the reposity
Lab1 Finish Exercise 9
 add the labs information
my solution to lab1
lab2 init and resolve the conflict
Lab2 finish the Exercise 2
Lab2 Exercise 3
Lab2 finish Exercise 4
Lab2 Exercise 4 Fix some bug about prettyPrinter
Lab2 Finish Exercies5: modfity the parser.java to add generate AST. And, fix some bugs of lexer.java and PreettyPrintVistor.java
Lab2 Finish Exercise 7: Finish the code in ElaboratorVisitor.java
Lab2: Finish Exercise 8. Modify the error method, make error() method  could  detected all the errors
Lab2: Exercise 9: emit warning messages, but it only coult to the unused variable in one method
my solution to lab2
Lab2: init. Finally resolve all the conflicts
Lab3: leaning something about code generate