Description
Lab 4 – Risk Estimator (and fun!)
Overview
Often doctors use tools that estimate how likely a patient will develop an illness. It compiles a number of contributing factors, uses statistical data for each, and then computes the likelihood it will happen.
Naturally, this is not a guarantee. But it is a very helpful guide.
For this lab, you are going to create a Risk Estimator program that will ask a series of yes/no questions and, then, print a percentage to the screen.
Each question is worth a predetermined number of points. If the user specifies the correct answer, it is added to their total score.
From this, you can compute a Risk Estimate from the answers.
RiskEstimate =
Sample Run
Points Earned Total Points
The following is a sample run of the program. This is not a real medical test. The user’s input is printed in blue. The data outputted from your calculations is printed in red.
20 Year Heart Risk Estimator Are you over 40 years old?
y
Are you a smoker?
n
Do you have diabetes?
n
Do you have hypertension?
n
Do you drink?
n
Your risk estimate is 5%.
1 point
Rest are 4 points
1 / 17
Have Fun!
Don’t use medical questions above. Create your own risk estimator with your own questions and point values. The following are some example categories.
- Risk of failing an exam
- Risk of barfing at a party
- Risk of getting into an auto accident
- Risk of getting “pwn’d” in a video game
- Risk of having explosive diarrhea
- etc…
Requirements
You must think of a solution on your own. The requirements are as follows:
- Prompt the user for each question
- Use a different theme (and questions) than the example. Labs using the medical questions above will not receive credit.
- Read a ‘y’ or ‘n’ answer for each question.
No credit will be given on the lab if y/n is not used. - Print out the correct percentage.
How do you get a value greater than zero? That’s your challenge to solve. - At least 5 questions.
Reading Text
To read text from the keyboard, please read about the ScanChar subroutine in the CSC35 Library.
Hints
2
•
• •
Like all labs, build it in pieces. First get a single If-Statement to work. Then, you can work on the more detailed ones.
All labels must be unique. Choose your names well. Remember to use 8-bit registers to compare ‘y’ and ‘n’.
Submitting Your Lab
Run Alpine by typing the following and, then, enter your username and password.
To submit your lab, send the source file (not a.out or the object file) to:
UNIX Commands
Editing
3
alpine
|
Action |
Command |
Notes |
|
Edit File |
nano filename |
“Nano” is an easy to use text editor. |
|
|
alpine |
“Alpine” is text-based e-mail application. You will e-mail your assignments it. |
|
Assemble File |
as -o objectfile asmfile |
Don’t mix up the objectfile and asmfile fields. It will destroy your program! |
|
Link File |
ld -o exefile objectfiles |
Link and create an executable file from one (or more) object files |
Folder Navigation
|
Action |
Command |
Description |
|
Change current folder |
cd foldername |
“Changes Directory” |
|
Go to parent folder |
cd .. |
Think of it as the “back button”. |
|
Show current folder |
pwd |
Gives a file path |
|
List files |
ls |
Lists the files in current directory. |
File Organization
|
Action |
Command |
Description |
|
Create folder |
mkdir foldername |
Folders are called directories in UNIX. |
|
Copy file |
cp oldfile newfile |
Make a copy of an existing file |
|
Move file |
mv filename foldername |
Moves a file to a destination folder |
|
Rename file |
mv oldname newname |
Note: same command as “move”. |
|
Delete file |
rm filename |
Remove (delete) a file. There is no undo. |
