How to use:
1. make clean
2. make
3. you got a executable file: run. Execute it by type: ./run, in the command line
4. In the tag frequency test, I choose Normal linear counter as input. The func
of each type of input can be referred in src codes

Dir hierarchy 
1. src: c code files
2. include: head files
3. obj. executable files
4. python_src: tag frequency static python files 
5. long: store long-length components
6. short: store short-length components such as tag

Tips:
choose the components you want to observe and output to files. This
functionality can be achieved by slight modify the src codes