Permitted C++ Features for Lab 2

For this lab, you must:
      Define functions that take parameter(s),
      Use the functions that you define,
      Produce a clearly structured program that deserves to work.
You may:
      Use any of the built-in C++ or library functions,
      Introduce named constants,
      Accept interactive user input with read_int() etc.,
      Define functions that produce a value (not just void),
      USe the return statement.
Other features of C++ are absolutely out of bounds, especially no variables, no assignment, no loops.