09-paint-calculator

Paint Calculator

• Ruby
• Go

Problem Statement

Calculate gallons of paint needed to paint the ceiling of a room. Prompt for the length and width, and assume one gallon covers 350 square feet. Display the number of gallons needed to poaint the ceiling as a whole number.

Example Output

You will need to purchase 2 gallons of
paint to cover 360 square feet.

Constraints

• Use a constant to hold the conversion rate.
• Ensure that you round up to the next whole number.

Analysis

Inputs:

• length
• width

Processes:

• calculate area
• calculate gallons needed

Outputs:

• area in feet
• paint in gallons

Test Plan

Input:

• length
• width

Expected result:

• area in feet
• gallons of paint

Pseudocode

PaintCalculator
  Initialize gallon with 350

  Prompt for length with "What is the length of the room?"
  Prompt for width with "What is the width of the room?"

  area = length * width
  gallons = area / gallon, rounded up to the next whole number

  Display "You will need to purchase {gallons} gallons of"
  Display "paint to cover {area} square feet."
End