IT 210 Week 2: Application-Level Requirements

Associate Program Material

Appendix B

Input and Output Process Example

The following example explains how to write a program that calculates the cost of painting a room. If the user provides the price of a gallon of paint; the number of square feet one gallon of paint covers; and the length, height, and width of the room, you can calculate the total cost of painting the room.

To calculate the total cost, determine the room area and divide the area to be painted by the number of square feet one gallon of paint covers. Then, multiply the number of gallons needed by the price per gallon to find the total cost. Provide the total cost to the user.

The following chart illustrates the data input and output process:

Input	Process	Output
Price Square feet per gallon Width Length Height	Get user input.	Price Square feet per gallon Width Length Height
Length Height Width	Find room area.	Total area
Square feet per gallon Total area	Divide the area.	Gallons needed
Gallons needed Price	Multiply gallons.	Total cost
Price Square feet per gallon Width Length Height Total cost	Display the total.	Total cost