CS 145 Topics

Next Exam will be Mon, Mar 17
Labs
- Finish Lab 4: Making Waves and Circles. Due Wed.
- Begin Lab 5: Bouncing Balls.
Arrays (See lab 5 for sample code)
- Image Manipulation example
- What is an array? Why do we use arrays?
- Arrays and loops go hand-in-hand.
- How do you declare an array?
- How do you create the elements of an array?
- How do you initialize an array?
- How do you print an array?
- How do you access (or use) an array element?
- Try this: Write a program which (do these one at a time)
  - Declares and creates an array of 20 floats called nums
  - Uses a loop to initializes the elements in nums using the random number generator in the range from 0 to width.
  - Sets the element at index 0 equal the element at index 10
  - Uses a loop to print out all of the elements of nums.
  - Uses a loop to sum all of the elements of nums and print the result.
  - Uses the previous sum, to compute the average of all elements in nums
  - Create a new array of floats called nums2 of the same size and copy the elements of nums into nums2 so that the two arrays have identical values for each index.
  - Uses a loop to divide all elements of nums2 by the average and print out the values.