ITEC 120 lab 17

ITEC 120 LAB 17

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Fun with arrays

You only need one java file with a main method for this project.

You will write a program which will read integers into an array and do some manipulations to the array.

read in an integer which will tell you how many integers you will be given to read in
read in that many integers, one integer at a time (from the keyboard. Redirect from a file if you wish.)
store the integers in an array
output the integers in the array forward (all on one line, separated by spaces)
output the total number of even integers, the total number of odd integers, the highest integer in the array, the total of all integers (added together) in the array, and average of all integers in the array
output the array of integers backwards (on one line, separated by spaces)

Sample run:

User inputs:

java lab17 < ints.txt

Program outputs:

How many numbers will be entered?
Enter num 1:Enter num 2:Enter num 3:Enter num 4:Enter num 5:Enter num 6:Enter num 7:Enter num 8:Enter num 9:Enter num 10:Enter num 11:Enter num 12:Enter num 13:Enter num 14:Enter num 15:Enter num 16:Enter num 17:

23 34 56 45 88 77 66 55 44 9 8 7 6 5 4 3 2

There were 9 even numbers.
There were 8 odd numbers.
The highest integer is: 88
The total of all numbers was: 532
The average of all numbers was: 31.294117

2 3 4 5 6 7 8 9 44 55 66 77 88 45 56 34 23

Redirection -

Ever get tired of typing input into your programs? You can redirect input from a file instead. You need your input typed into a text file, which needs to be in the same directory as the program you want to run. At the command line, type java programname < inputfile, for example:

java lab17 < ints.txt

and lab17 will run, getting its input from ints.txt instead of the keyboard. The above output was created by the input in ints.txt.

Once you have your program working, show your lab to the Peer Instructor to be checked off. Run the program with ints.txt and ints2.txt as input.