Implement the funciton in src/gries.py with the following specification:
Inspired by the 56 years of programming experience that
Professor Gries has:
Your objective is, given the year that someone has began
to study computer science, return the years of programming
experience they have so far.
Assume everyone began on January 1st of that year.
Implement the funciton in
src/gries.py
with the following specification: