Arrays - Building Java Programs: A Back to Basics Approach - page 435

24 for ( int i = 0; i < temps.length; i++) {
25 if (temps[i] > average) {
26 above++;
27 }
28 }
29
30 // report results
31 System.out.println();
32 System.out.println("Average = " + average);
33 System.out.println(above + " days above average");
34 }
35 }
Here is a sample execution of the program:
How many days' temperatures? 9
Day 1's high temp: 75
Day 2's high temp: 78
Day 3's high temp: 85
Day 4's high temp: 71
Day 5's high temp: 69
Day 6's high temp: 82
Day 7's high temp: 74
Day 8's high temp: 80
Day 9's high temp: 87
Average = 77.88888888888889
5 days above average
Random Access
Most of the algorithms we have seen so far have involved sequential access.
Sequential Access
Manipulating values in a sequential manner from first to last.
A Scanner object is often all you need for a sequential algorithm, because it
allows you to access data by moving forward from the first element to the last. But as
we have seen, there is no way to reset a Scanner back to the beginning. The sample
program we just studied uses an array to allow a second pass through the data, but
even this is fundamentally a sequential approach because it involves two forward
passes through the data.
An array is a powerful data structure that allows a more sophisticated kind of
access known as random access: