Parser for Tiny C (a subset of C language)

• Developed a tiny C parser using parsing technique and avoiding anomalies.
• The tools used for development were Flex and Bison.

cucu.l

- cucu.l tokenizes each matching string.
- please take care when writing writing pointer to char i.e. "char *" is correct, 
  while "char*" is not allowed. This is strictly in complaince as written in problem statement.
- since there are only 3 datatypes allowed (int, char *. char **), using datatypes like char or void isn't allowed. using datatypes other than allowed datatypes will give an error.
- error will be reported in lexer.txt as well as in terminal.

cucu.y

- function defination is in format similar to that of in C.
- function declaration is in format similar to that of in C.
- if statements and while statements is allowed.
- output is printed in "parser.txt".
- during parsing of an expression, format of printing is "similar to" postfix.
- parsing of bracket is a little tricky , but can be done by parsing from left to right. 
- similarly parsing of if-else , while etc. is also a little tricky.
- content within function is above function name.

how to run?

• run following commands in order.

  flex cucu.l
  bison -dy cucu.y
  gcc y.tab.c lex.yy.c -o cucu.exe
  ./cucu.exe Sample1.cu 
  ./cucu.exe Sample2.cu 

• Sample1.cu should give proper output in lexer.txt and parser.txt
• Sample2.cu should give an error.