Extracting operators and operands from the source code

Hi there,
I am looking for a way to extract operators and operands from a source code to do a complexity analysis of the code. The final outcome I am expecting is to get the number of operators and operands in the code, to perform a Halstead Complexity Analysis.
Please let me know how this parsing can be done apart from just doing a sequential search of the content in the file.
Any samples and references are highly appreciated.
Thanks in advance!
Regards,
Aravinda777

Common way to analyze code is to defining the things you are interested in using some approproate language and then using a parser generator (or compiler compiler = cc). I used antlr some time ago for this reason. Perhaps you want to take a look at it:
http://www.antlr.org/

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Extracting operators and operands from the source code

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