1. PROGRAMMING
Program Development

2. Learning Outcomes Apply program development phases to solve problems
Develop a program

3. 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

4. Programming Development Phase
Problem Analysis
Program Design
Coding
Testing and Debugging
Documentation

5. 1 1. Problem Analysis What the problem?
What the input, process, and output?
What the formula on how to calculate the mathematic operations?

6. 2 2. Program Design Write the pseudo code Write flow chart
Design user interface

7. 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

8. Flow Chart
START
READ number 1 & 2
CALCULATE
PRINT the answer
STOP/END

9. User Interface

10. 3. Coding 3
SCRIPTING

11. 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

12. 4. Testing and Debugging 4
RUN & COMPILING

13. 5. Documentation 5
Internal Documentation
External Documentation

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