Question: I have : 1 . lex.cpp 2 . lex.h 3 . parser.h 4 . prog 2 . cpp Just you need to add required method

I have :
1. lex.cpp
2.lex.h
3.parser.h
4.prog2.cpp
Just you need to add required method and contins according to testprog1-testprog19
I have attached testcase and its output :

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