Specifications of Grammer can be seen in Compilers 2016 Assignment 2.pdf
Assignment2.l contails tokenizer and Assignment2.y contails grammer for C-lite/Decaf Programming Language.
To compile => Enter make -B in terminal
To run => Enter ./a.out <inputFileName>
After running you will see "Success" or "Syntax Error" as output.
If you see "Success" bison_output.txt will contain the order in which non-terminals were found.