Chapter 1: Programming Challenge 1

Step 1: Clearly define what the application is to do.
Purpose: To calculate the area of a rectangular space
Input: Length and width of space
Process: Multiply the length and width
Output: Display the total area

Step 2: Visualize the application and design its user interface.


Step 3: Make a list of the controls needed.

Type	Name	Text
Form	(default)	“Carpet Calculator”
Label	(default)	“Length”
Label	(default)	“Width”
Label	(default)	“Total Area”
Textbox	txtLength	“ “
Textbox	txtWidth	“ “
Textbox	txtTotalArea	“ “
Button	btnCalcArea	“Calculate”
Button	btnClear	“Clear”
Button	btnClose	“Close"

Step 5: Make a list of methods needed for each control.

Method	Description
btnCalcArea_Click	Multiplies txtLength and txtWidth values to find txtTotalArea
btnClear_Click	Clears txtLength, txtWidth, and txtTotalArea
btnClose_Click	Ends application

Step 6: Create a flowchart or pseudo code version of each method.