1. Visual C++ Programming: Concepts and Projects
Chapter 7B: Arrays
(Tutorial)

2. Tutorial: Classroom Seating
Problem Analysis
Create a classroom seating chart
Squares will represent seats
Color code the seats to match student performance levels
Red = below the mean
Yellow = mean up to 90%
Green = 90% or better
Programming with Visual C++

3. Programming with Visual C++
Design
Interface sketch
Multiple rows of seats
Seats are color-coded by student score
Mean score is displayed in a TextBox
Two buttons
To display empty seats
To display colored seats used to locate groupings
Programming with Visual C++

4. Programming with Visual C++
Design (continued)
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5. Programming with Visual C++
Design (continued)
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6. Programming with Visual C++
Design (continued)
Constants
The number of rows and columns of seats
Programming with Visual C++

7. Programming with Visual C++
Design (continued)
Data table
Instance variables
Programming with Visual C++

8. Programming with Visual C++
Design (continued)
Drawing objects
Programming with Visual C++

9. Programming with Visual C++
Design (continued)
Algorithm for btnShow_Click()
Construct a seating chart
Draw a rectangle in every column in each row
Programming with Visual C++

10. Programming with Visual C++
Design (continued)
Programming with Visual C++

11. Programming with Visual C++
Design (continued)
Algorithm for btnGroup_Click()
Programming with Visual C++

12. Programming with Visual C++
Design (continued)
Trace sample data to test the algorithms
The program maps a one-dimensional array of data into a two-dimensional array of seats
Proceed one row at a time
Process each column in that row
Programming with Visual C++

13. Programming with Visual C++
Design (continued)
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14. Programming with Visual C++
Design (continued)
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15. Programming with Visual C++
Design (continued)
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16. Programming with Visual C++
Design (continued)
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17. Programming with Visual C++
Design (continued)
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18. Programming with Visual C++
Development
Create the interface
Code the constants and instance variables
Code Form1_Load()
Code btnShow_Click()
Code btnGroups_Click()
Programming with Visual C++

19. Development (continued)
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20. Development (continued)
Code the constants and instance variables
Programming with Visual C++

21. Development (continued)
Code Form1_Load()
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22. Development (continued)
Drawing the seats on the interface
The horizontal distance between each seat is 75 pixels
The vertical distance between each seat is 40 pixels
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23. Development (continued)
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24. Development (continued)
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25. Development (continued)
Code btnShow_Click()
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26. Development (continued)
Code btnGroups_Click()
Before drawing the seats, the mean must be calculated and displayed
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27. Development (continued)
CalcMean()
Accumulates the sum of the values in the array
Divides by the number of array elements
Programming with Visual C++

28. Development (continued)
Drawing the color-coded seats
Programming with Visual C++

29. Programming with Visual C++
Testing
Verify that interface matches Figure 7-17
Verify that the mean is correct
Make sure that the seats are colored correctly to match the three levels of student performance
Programming with Visual C++

30. Programming with Visual C++
On Your Own
Display the highest score
Display a count of scores above the mean
Programming with Visual C++