451207 Information Systems and Programming

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451-207 Information Systems and Programming

• Allison Kealy
• akealy_at_unimelb.edu.au
• Department of Geomatics
• The University of Melbourne Victoria
• 3010

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Why do this course?
PLEASE TURN OFF ALL MOBILE PHONES
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What we will cover today!

• Course Outline
• Assignment for Visual Basic
• Software Development Method
• Introduction to Visual Basic
• Simple Implementation
• How to debug your Visual Basic Program

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At the end of todays lecture .

• You should be able to write a simple Visual basic
  program
• Create an interface using Visual Basic Objects
  and Controls
• Construct a software development plan for the
  assignment

5
VB Course Plan
Week 1 Introduction to Visual Basic
Week 2 Decisions and Repetitions
Week 3 Functions and Subroutines
Week 4 Arrays and other applications
6
Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Problem
• Your summer surveying job requires you to study
  some maps that give distances in km and some that
  use miles. You and your co-workers prefer to
  deal in metric measurements.
• Write a program that performs the necessary
  conversion.

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Software Development Method

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Specify the problem requirements
• Analyse the problem
• Design the algorithm to solve the problem
• Choose the interface
• Implement the algorithm
• Test and verify the completed program
• Maintain and document

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Software Development Method

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Specifying the problem requirements forces you to
  state the problem clearly and unambiguously and
  to gain a clear understanding of what is required
  for its solution. Your objective is to eliminate
  unimportant aspects and zero in on the root
  problem.

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
9
Software Development Method

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Analysing the problem involves identifying the
  problem inputs, outputs and any additional
  requirements or constraints on the solution.

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
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Example

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Compute and display the total cost of apples
  given the number of kgs of apples purchased and
  the cost per kg of apples.
• Problem Inputs
• quantity of apples purchased (in kgs)
• cost per kg of apples (in dollars per kg)
• Problem Outputs
• total cost of apples (in dollars)
• Formula
• total cost of apples cost per kg x kgs of
  apples

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
11
Software Development Method

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Designing the algorithm to solve the problem
  requires you to develop a list of steps called an
  algorithm to solve the problem and then verify
  that the algorithm solves the problem as
  intended.
• Discipline yourself to use top-down design. List
  the major steps or sub problems, then solve the
  original problem by solving each of the sub
  problems.

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
12
Example

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document

• Get the data
• Perform the computations
• Display the results

13
Software Development Method

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and documentation

• Identify the objects and controls you want to
  have on the screen.
• This determines how the user interacts with the
  program.

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Software Development Method

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Implementing the algorithm involves writing it as
  a program.
• You must convert each algorithm step into one or
  more statements in a programming language.

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
15
Software Development Method

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Testing and verifying the program requires
  testing the completed program to verify that it
  works as desired.
• Dont rely on just one case

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
16
Software Development Method

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Maintaining and updating the program involves
  modifying a program to remove previously
  undetected errors.
• Organise all material that describes the program

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
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Introduction to Visual Basic

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

Link to Microsoft Visual Basic
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Working with VB Objects

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Objects
• Forms
• Controls
• Text boxes
• Labels
• Command Buttons
• Events
• Clicking a control
• Pressing the tab key

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Summary of steps

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Create the interface
• Set the relevant properties
• Write the code that executes when events occur

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Example

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Problem
• Your summer surveying job requires you to study
  some maps that give distances in km and some that
  use miles. You and your co-workers prefer to
  deal in metric measurements.
• Write a program that performs the necessary
  conversion.

21
Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• What is the problem asking us to do?

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
22
Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Problem Inputs
• Problem Outputs
• Formula

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
23
Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Get the data
• Perform the computations
• Display the results

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
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Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Get the distance in miles
• Convert the distance to km
• 3. Display the distance in km

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and document
25
Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and documentation

• Create the VB interface for this program. Be sure
  to set the properties for all objects correctly.

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Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

Write the code that will execute. Use the
algorithm to help make this step simpler.
Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and documentation
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Implementaion

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

• Private Sub cmdcompute_Click()
• txtkm.Text txtmiles.Text 1.65
• picOut.Print txtkm.Text
• End Sub

Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and documentation
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Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

Test the program for all cases.
Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and documentation
29
Class Activity

• Course Outline
• Assignment
• Software Development Method
• Introduction to VB
• VB Objects and Controls
• Implementation of the Software Development Method
• Debugging your VB Program

Include some documentation in the code you have
just written
Specify the problem requirements Analyse the
problem Design the algorithm to solve the
problem Choose the interface Implement the
algorithm Test and verify the completed
program Maintain and documentation
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Debugging

• Course Outline
• Assignment for Visual Basic
• Software Development Method
• Introduction to Visual Basic
• Visual Basic Objects and their Properties
• How to debug your Visual Basic Program

• Step into
• Step over
• Run to cursor
• Breakpoint
• Watch value

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VB Course Plan
Week 1 Introduction to Visual Basic
Week 2 Decisions and Repetitions
Week 3 Functions and Subroutines
Week 4 Arrays and other applications