# Classwork 3

## Logistics

• Due: Wednesday, May 12th no later than 1:35pm.
• Submission instructions: push a commit with the tag classwork3 to your git repository.
• Deadline reminder: after the deadline passes, you cannot earn any points for this assignment. If the deadline is approaching, submit what you have in order to earn partial credit.

## Learning outcomes

• Use a function to organize your program.

## Assignment

This comes from problem 13, chapter 3 on page 171.

After studying the population growth of Gotham City in the last decade of the 20th century, we have modeled Gotham’s population as

P(t) = 52.966 + 2.184t


where t is years after 1990, and P is population in thousands. Thus, P(0) represents the population in 1990, which was 52.966 thousand people. Write a program that defines a function named get_population that takes in a an int for the years after 1990 and returns a double for the population (in thousands). Your program should call the function and interact with the user as follows:

Enter a year after 1990> 2015
Predicted Gotham City population for 2015 (in thousands):
107.566


### Requirements

• Write your program in the classwork directory, inside another directory called classwork3, in a file called population.c.
• Compile your program into an executable called population and run it using ./population.

### Hints

• Develop your program in steps, checking that it compiles and runs after every significant change.
• 1 point - there is a file called population.c in your classwork/classwork3 directory.
Note: you will not earn any points if your work is not committed and pushed to Github with the tag classwork3.