2.27 LAB*: Program: Painting a wall

Program Specifications Write a program to calculate the cost to paint a wall. Amount of required paint is based on the wall area. Total cost includes paint and sales tax.

Note: This program is designed for incremental development. Complete each step and submit for grading before starting the next step. Only a portion of tests pass after each step but confirm progress.

Step 1 (2 pts). Read from input wall height, wall width, and cost of one paint can (doubles). Calculate and output the wall's area to one decimal place using System.out.printf("Wall area: %.1f sq ft ", area);. Submit for grading to confirm 1 test passes.

Ex: If the input is:

12.0 15.0 29.95 

the output is:

Wall area: 180.0 sq ft 

Step 2 (2 pts). Calculate and output the amount of paint needed to three decimal places. One gallon of paint covers 350 square feet. Submit for grading to confirm 2 tests pass.

Ex: If the input is:

12.0 15.0 29.95 

the output is:

Wall area: 180.0 sq ft Paint needed: 0.514 gallons 

Step 3 (2 pts). Calculate and output the number of 1 gallon cans needed to paint the wall. Extra paint may be left over. Hint: Use Math.ceil() to round up to the nearest gallon and convert to an integer. Submit for grading to confirm 4 tests pass.

Ex: If the input is:

12.0 15.0 29.95 

the output is:

Wall area: 180.0 sq ft Paint needed: 0.5142 gallons Cans needed: 1 can(s) 

Step 4 (4 pts). Calculate and output the paint cost, sales tax of 7%, and total cost. Dollar values are output with two decimal places. Submit for grading to confirm all tests pass.

Ex: If the input is:

8.0 8.0 49.20 

the output is:

Wall area: 64.0 sq ft Paint needed: 0.183 gallons Cans needed: 1 can(s) Paint cost: $49.20 Sales tax: $3.44 Total cost: $52.64

import math

paint_colors = { 'red': 35; 'blue': 25; 'green': 23; }

wall_height = int(input('Enter wall height (feet): ')); wall_width = int(input('Enter wall width (feet): '));

print('Wall area:', wall_height * wall_width, 'square feet'); print('Paint needed: {:.2f} gallons'.format((wall_height * wall_width) / 350));

Cans = math.ceil((wall_height * wall_width) / 350); print('Cans needed:', Cans,'can(s)');

color = input(' Choose a color to paint the wall: '); print('Cost of purchasing {} paint: $'.format(color), end=''); print(paint_colors[color] * Cans);