Assignment 4

This assignment is worth 20 points.

When you finish this assignment you should
- Be able to copy a program from my directory.
- Be able to modify an existing program to extend it's behavior.
- Add documentation (comments) to a program.

Copy the file message.C from my directory. To do this type

cp ~dbennett/130/TR/message.C .
or
cp ~dbennett/130/MW/message.C .

This will place a copy of a the program in your current directory.

Edit the program

Add a header comment as discussed in class.
Add some comments to describe what is happening in different places in the code.
Add code to extend the program so that it will show all case permutations of three letters. Note the order of the letters should stay the same, but case should change. If the input is aBc, the output should be :
```
abc abC aBc aBC Abc AbC ABc ABC
    
```
Make sure that you add comments to your new code as well.

When you have completed this assignment, send a copy of the code as an attachment to danbennett360@gmail.com.