Lab 4: Loops and arrays

The goal of this lab is to practice writing programs with loops, switch statements, and arrays.

Make a new directory, as usual. Then make a file from scratch containing an interactive program that operates on arrays. Specifically, which does the following.

• Asks the user for the size of an array.
• Repeatedly presents the user with the following menu:
  1. Set a value in the array
  2. Find the average of the elements in the array
  3. Find the minimum and maximum values in the array
  4. Display the contents of the array
  5. Quit
• The user's menu selection is interpreted using a switch statement.
• If the user selects (1), the program asks for an index and a value to put in that position.
• Operations (2)-(4) are performed using a for loop.
• If the user enters a number other than (1)-(6), an appropriate message is displayed and the menu is displayed again.

Turn-in

1. Start a script. Remember this is done using the script command, giving the name of a script file.
2. Delete any class files. This is done using the rm command. rm *.class will delete all files that end in .class. Be careful--- don't delete your .java files!
3. Print the file
4. Compile the program, as you did before.
5. Run the program, as you did above.
6. Exit the script.
7. Print the script. I recommend using a2ps -P sp (name of script file). a2ps prints the file in "2-up" mode. Remember that sp is the name of the printer.

Make sure you have exited the script file before you print, or else it will print forever!

Then turn in the hard copy to me.