SPECIFIC DIRECTIONS

Question

The cabin specifics: it’s still a simple rectangular structure, but now you’re only concerned with the walls—we’ll just forget about the ceiling for the rest of our planning exercises. You’ll still need to request the users name, length of the room, its width, and its ceiling height (all in feet), the color of paint, (note the paint name can contain spaces) and the number of coats of paint to be applied in this order.

We need to know what the total wall surface area is so we can now determine how many windows are allowed; and finally we want to know how much paint will be needed. (We'll forget about the brushes also.)

Once you determine the total wall surface area, calculate the number of windows this way. We can install a maximum number of windows that are allowed by the county code for this area. That code states that the builder can install a maximum of one window for every 145 square feet of total wall surface area. (Don’t worry about corners, etc: just use the total wall area you came up with. So, for example, if the total wall surface area is 160,
then only one window is allowed. If the total area is 290, then two windows are allowed. You must quote a whole number of windows, not a fraction: we cannot install a fraction of a window! (See the appendix to these instructions for help.)

Plan on installing as many windows as possible. The windows will be a “standard” size, each one taking up 18 square feet of wall surface area. Once you determine the actual wall area that’s left to be painted—we certainly don’t want to paint the windows—calculate the final paint requirements as in Program #2: 1 gallon covers 350 square feet. (Hint #1: be careful about computing the wall area left after “carving” out the windows: there’s a trap that you need to avoid. Again, you must plan to install a whole number of windows.) (Hint #2: don’t forget to plan for how many coats of paint the user wants to apply!)

I attempted this and it didn't give me the results I was looking for.