PROGRAMMING

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PROGRAMMING

• Program Development

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Learning Outcomes

• Apply program development phases to solve
  problems
• Develop a program

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Situation

• Your younger brother has a problem with a basic
  mathematic operations like addition, subtraction,
  multiplication, and division. Your parents ask
  you to develop one simple system using Visual
  Basic to help your brother.
• Your system should have function button to
  calculate the additional, subtraction,
  multiplication, and division for at least two
  integer numbers

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Programming Development Phase

1. Problem Analysis
2. Program Design
3. Coding
4. Testing and Debugging
5. Documentation

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1. Problem Analysis
1

• What the problem?
• What the input, process, and output?
• What the formula on how to calculate the
  mathematic operations?

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2. Program Design
2

• Write the pseudo code
• Write flow chart
• Design user interface

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Pseudo code

• PROGRAM Mathematic_Operations
• READ the first number
• READ the second number
• READ commandbutton Add
• CALCULATE the sum of number 1 and number 2
• PRINT the answer for Addition
• END PROGRAM

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Flow Chart
START
READ number 1 2
CALCULATE
PRINT the answer
STOP/END
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User Interface
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3. Coding
3

• SCRIPTING

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Coding

• formula for additional (internal documentation)
• Private Sub cmdAdd_Click()
• Dim Number1, Number2 As Integer
• Number1 txtNumber1.Text
• Number2 txtNumber2.Text
• txtSum Number1 Number2
• End Sub

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4. Testing and Debugging
4

• RUN COMPILING

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5. Documentation
5

• Internal Documentation
• External Documentation

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Exercises

• Modify the additional formula to use for
  subtractions, multiplication and division.