Determine an appropriate activity for a given temperature (swimming if it is hot, tennis if cooler,...) .

Steps:
  1. Get the temperature
  2. Print the activity.
Functions:
  1. get_temp
  2. print_activity
What are the parameters?
Which are value and which are reference?

main   get_temp
  <-- temp
main   print_activity
  --> temp


Structure Chart:
               main

          temp    temp

get_temp     print_activity