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$ cd lab1
$ flex lexical_analysis/scanner.l
$ gcc lexical_analysis/lex.yy.c  -o lexical_analysis/scanner
$ ./lexical_analysis/scanner < lexical_analysis/test.c

$ cd lab2
$ flex scanner.l
$ bison parser.y
$ gcc y.tab.h lex.yy.c parser.tab.c -o parser
$ ./parser < test/test

$ cd lab3
$ flex scanner.l
$ bison parser.y
$ g++ symbols.cc ast_symbols.cc ast.cc ast_print.cc lex.yy.c parser.tab.c -o parser -std=c++11
$ ./parser < test/test

$ cd lab4
$ make
$ ./main < test/array1.decaf