1. Introduction to Programming

2. Software Development Life Cycle
Gather
Requirements
Design
Program
Code & Test
Program
Implement
Software Development has four main phases
Gathering Requirements
Program Design
Coding & Testing the Program
Implementing the Program
The software development cycle is the process by which a program/application is constructed. While there are many different methodologies (e.g. waterfall), they all have the main phases above.

3. CS132 Development Life Cycle
Gather
Requirements
Design
Program
Code & Test
Program
Implement
Get requirements document from D2L
Make sure you understand the requirements
Design the form layout
Add code to the program to meet the requirements
Test the program under several possible scenarios
Submit program for grading in the D2L dropbox
For INFS639, our life cycle is truncated quite a bit. You will get requirements form the book; Some even have screen designs for you. This is a little unrealistic though; that is why two designs (Sept 29 and Oct 13) to do independently. Some of the programs build on each other, so you want to make sure you keep a copy of what you give me. You will be responsible to code and test your programs before submitting. The implementation phase of the life cycle for the class is abbreviated into you handing the program in.

4. Program Design Basics A software developer must
Design the visual elements (user interface) and logical function of the program to meet the given specifications
The design is language independent; could be described using flowcharts or pseudocode
Implement this design by writing code that is both functional and easily understood by another programmer
Think of the target audience of a program as being other programmers, not just the computer
Describes a programmer’s job. I always think of a programmer as a translator. He or she must be able to translate what the user says they want into something the computer recognizes.

5. Design Tools
Algorithm - finite set of unambiguous instructions, that when given a set of input values, produces the desired outputs, then stops
Like a recipe
Often given pseudocode, a programming language-like set of natural language instructions
Flowchart - a graphical language used to communicate the logic of a program
For our purposes, algorithm and pseudocode will be used interchangeably. You may also see the same process called Structured English. They all mean the same thing; a structured way to think about and design code.
Flowcharts are a bit antiquated, but the concepts inherent with them is still valid. Again, flowcharts are another way to provide structure to a very unstructured process.

6. Describing an Algorithm with Pseudocode
Consider the task of making a peanut butter and jelly sandwich
Given a jar of peanut, a jar of jelly, a loaf of sliced bread, and a knife:
Take two bread slices from the loaf
Open jelly jar; use knife to apply jelly to one slice of bread
Open peanut butter jar; use knife to apply peanut butter to the other slice of bread
Place the bread slices together
What is left out?

7. Flowcharts
An alternative, graphical way to describe a program’s design
System Flowchart
Program
Flowchart
There are two main sets of flowcharting symbols: system and program. We are going to deal with the program level in the later chapters when the logic gets a little more complex. For now, we will practice going between algorithms and flowcharts.

8. Implementing design To complete our software projects we will need to
Understand file management in Windows
Access the CEAS computer labs
Become familiar with the Visual Basic Integrated Development Environment (IDE)
Find information using VB Help

9. The Windows File System
Double clicking on the “My Computer” icon will invoke the process shown.
There are four views of the data, two are shown.
Normally, only one view of the window will appear until you open sub-menus.

10. Copying Files
Open two “My Computer” windows, one for the area with files in it and one for the destination area
Mark file(s) in first window to be copied
Click on Edit-Copy
Move to other window
Click on Edit-Paste

11. Single and Multiple Files
(1) Click left hand button to select one file and to deselect all others.
(2) While holding down Ctrl, click to add a file to selection list.
(3) While holding down Shift, click to add a range of files to selection list.

12. (Hint for Later)
This business of Click, Ctrl-Click, and Shift-Click will come in very handy later when you wish to select Objects in Visual Basic (VB) for various kinds of manipulation.
When you want to resize, change font, or move a group of objects, the Ctrl and Shift-Click really works to your advantage.

13. Engineering Lab Drives
The Engineering Laboratory has several drives available to you. In general they are named A, C, I, Q, R & S.
A: The floppy disk drive, 3.5 inch, 1.4 (or 0.7) megabytes
C: The local hard drive, belongs to the machine you are sitting in front of (the local machine).
I: A part of the disk “farm”. Each of us has his own copy of drive “I” with a 40 megabyte capacity.
Q, S: The software “farm”. You may execute some files, copy other but cannot change any of them.
R: A part of the disk “farm” with special software for each class. R:\cs132 contains class material.

14. Engineering Lab Drives

15. I & M T Lab Drives
Drive P on this system is not the same space as Drive I in the Engineering lab system.

16. Visual Basic (VB)
We will be using the Engineering Laboratory to study programming in the Visual Basic Language.
In the pictures that follow we will examine how that tool is installed in the Engineering Laboratory, other machines will most certainly differ.

17. Accessing Visual Basic (VB)

18. Visual Basic Files
When you save a program in VB several files are created.
The two that are most significant are the .frm and the .vbp files, the form and program files.
Both of them are text files.

19. The File Blink.frm Begin VB.Form Form1 Private Sub blink_Click()
If blink.Caption = "blink on" Then
Timer1.Interval = 500
blink.Caption = "blink OFF"
Else
Timer1.Interval = 0
blink.Caption = "blink on"
End If
End Sub
. . .

20. The File Blink.vbp Type = Exe Form = A:\BLINK.FRM Name="Project1"
RevisionVer = 0
AutoIncrementVer = 0
ServerSupportFiles = 0
VersionCompanyName="UWM EECS Dept."
. . .

21. Moving VB Projects
VB allows a program file on drive A to use a form file on drive I.
Saving (or copying) a project file to another directory or drive will not move its form file
If you wish to transport your program on a floppy disk, BE SURE to copy both the .FRM and the .VPB files.

22. The Visual Basic IDE

23. The Workspace & Toolbox

24. Selecting Tools
Using the toolbox and the Workspace Window you can build a form that has nearly any desired appearance
Double click on an icon in the toolbox to create a new instance of that type of object in your workspace
These objects are called controls
Using the mouse, a control can be resized or moved

25. The Project Window
This window allows you to select and open one or more forms that are used in a given project.

26. The Form Layout Window
You may use this window to adjust the position of the form on the CRT screen.
Clicking on the “X” will close this window and leave room for other things.

27. The Properties Window
This window allows you to examine and modify the various properties of control objects in a program
Properties govern the appearance and behavior of a control object
They may be modified using the properties window, or by VB code

28. To Learn More
More material on the VB window can be found in the textbook
Using VB Help you can look under “properties window” or “project window”

29. Click on Contents under Help
Finding Help in VB
Click on Contents under Help

30. Finding Visual Basic Help
Clicking on the pull down window marked “Active Subject” or “(entire Collection)” will cause a limit to be placed on the searches
Move down to the “Visual Basic Documentation” line

31. Contents Page of Help Screen
When the contents tab is clicked the various “volumes” of help are shown
Clicking on the “+” sign opens a volume
Clicking on the “-” sign closes it again

32. Click on Index under Help
Indexed Data in VB Help
Click on Index under Help

33. Indexed Data

34. Index Items Items shown in gray do not apply to the “Active Subset”
Items shown in black do apply.
Often the help is more sophisticated than the question

35. Click on Search under Help
Searching VB Help
Click on Search under Help

36. Searching

37. To Learn More
An excellent search beginning is to look for a match to “hello visual basic” and just read the hits