Programming Assignment 1
Due January 28, 2015 at 11:59 PM
Objectives
• To practice with writing, compiling, and running a small C++ program.
• To practice with basic C++ input/output features, along with some simple decimal formatting.
• To practice with basic arithmetic operators in C++.
Task
Create a program (with the filename paint.cpp) that will calculate the amount of paint needed to
cover one side of a house with a sloped roof.
• Assume that this side wall of the house is generally shaped as in the diagram below (with
rectangular lower section, and triangular section where the roof slopes to a point) and that
it contains one rectangular window, which does not get painted (obviously).
• As you can see in the sample execution, you should ask the user for the dimensions of the
wall (width, height to the bottom of the slanted roof, height up to the tip of the slanted roof)
and the dimensions of the window (width and height) – in this order. All of these dimensions
should be of type double.
• Assume that a can of paint will cover 400 square feet of wall (make this a constant integer
variable, so that it’s simple to change this value in the program – for example, to represent
larger cans of paint in future versions).
• After collecting all of the dimensions, your program should produce the output demonstrated
in the sample execution.
Also note that:
• The user-entered dimensions should be displayed in default format (only using a decimal point
and digits to the right when needed).
• The paintable area should be displayed to 1 decimal place.
• The required number of cans should be displayed to 2 decimal places.
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• Write your program so that the output looks EXACTLY like the sample execution shown
below (this means same wording, spacing, and formatting of numbers).
• Note: The underlining in the sample execution below is used to illustrate what the user is
typing in – obviously the underlining will not appear on the console.
• You may assume that user input will be correct (i.e. numeric entries and valid dimensions).
General Requirements
• No global variables.
• All input and output must be done with streams, using the library iostream.
• You may only use the iostream library (you do not need any others for these tasks).
• When you write source code, it should be readable and well-documented (follow the style
guidelines for programs).
Sample run 1: (user input underlined)
Welcome to Paint Calculator 2015!!
How
and
and
How
and
wide is the
how high is
how high is
wide is the
what is the
wall (in feet)? 40
the wall to the bottom of the roof?15.7
the wall to the top of the roof? 21.5
window (in feet)? 3
window’s height? 2.75
A side wall that is
40’ wide and
15.7’ tall to the roof bottom and
21.5’ tall to the roof top,
containing a window that is
3’ wide and
2.75’ tall,
has 735.8 square feet of paintable wall
and would require 1.84 cans of paint
(assuming that each can will cover 400 square feet of wall).
Thanks for using Paint Calculator 2015. Goodbye!!
Sample run 2: (user input underlined)
Welcome to Paint Calculator 2015!!
How
and
and
How
and
wide is the
how high is
how high is
wide is the
what is the
wall (in feet)? 38.5
the wall to the bottom of the roof? 14.85
the wall to the top of the roof? 18.123
window (in feet)? 2.75
window’s height? 1.4
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A side wall that is
38.5’ wide and
14.85’ tall to the roof bottom and
18.123’ tall to the roof top,
containing a window that is
2.75’ wide and
1.4’ tall,
has 630.9 square feet of paintable wall
and would require 1.58 cans of paint
(assuming that each can will cover 400 square feet of wall).
Thanks for using Paint Calculator 2015. Goodbye!!
Compiling and Running:
This code only uses a standard library (iostream), so it will compile with any C++ compiler. Make
sure you practice with MS Visual C++ 2012 (and make sure it reports no compile errors!) before
you submit the program.
Submitting:
Program submissions should be done through Blackboard under the Assignments tab. Program
submissions are due January 28 at 11:59 PM.
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