Identifying variables that are not used

Write a program reading C++, or Java code and identifying all variables (simple, tables,....), which are not used. Not so much details has been given to us unfortunately. The idea is to imitate compilers and make a system that will read a piece of code written either in Java or c++ (its your choice). And find all varibales that have been declared but not used, and give an error message "Variable var has not been used". Variables should be a mix of simple variables like integers, and more complex ones like lists or structures. Attention must be payed when variables share the same name but have different scope, as some of them might be used but not all! Example: int a = 1+2; Public fun(){ int a; int b = 3+$; } In this case variable 'a' inside function 'fun' has not been used. A document that explains the algorithm, describes input/output, describes test cases, constraints and limitations (if exists) is required. Comments on the code is appreciated. Deadline is one week. Notes: (Re 1- Please be sure that you can submit the task before the deadline. Any delay may result in terminating the agreemnet and canceling the project without payment. 2- Please don't rush to take the project before others only to to attempt to do it. And when unable to, you come up with execuses like "sick relatives" and "Emergency". This will result in canceling the project, bad review and report. 3- Please don't take the project if you have problems with English language. This will make everything complicated. 4- If you take the project. It will be awarded to you. With milestones created. 5- Feel free to stay in touch and ask questions and keep comunication going. Good freelancers will be given a good review, recomendation to my freinds and colleagues, and a promise to hire for future projects!