Lab CS180 4
Lab Goals
For this lab you will learn how to use ratio's to change the result of print statements. Use parsing/casting to determine letter grade from number grade.
Using Ratio's
For this lab you will have to use an ascii table, found here http://www.asciitable.com/.
if you recall an int truncates all numbers, so 3.24 becomes just 3. This can be very valuable since it becomes very easy to round off numbers and determine if they are within a set range.
Say you are filling a cylinder with water and you want to know if the water is in the top half or bottom, by dividing the current level of the water by the half way marker and type casting it as an int you are able to get a 0 if it is in the lower half and a 1 if it is in the lower half. This is also very valuable for something such as a well which has a cylinder with spherical ends, each of which needs a different calculation for area, you can determine which calculation of area to use by using ratios.
To print out a number as a char you simply type cast it with System.out.println((char) 70), which will print out A;
Setup
Before you begin, you need to create a folder called "lab04" in the CS180 folder to hold your .java file for this lab. Use the terminal to create this folder.
% pwd /home/yourlogin/CS180 % mkdir lab04 % cd lab04
Formatter
There are ways in java to format text so that it follows certain standards. In this lab your text must be formatted correctly. Instead of using System.out.println(); you will use System.out.format();. It is used slightly different then println, for example
System.out.prinln("Name: " + yourName + "\nScore: " + yourScore); and System.out.format("Name: %d", %s%nScore: yourName, yourScore); are the same
for more information follow this link http://download-llnw.oracle.com/javase/tutorial/java/data/numberformat.html
The Lab
YOU MUST USE FLOATS FOR ALL SCORES!!!
For this lab you will need to take in scores for projects, lab, midterm 1, midterm 2, and final.
Sample input.
Enter Projects total: 50.4 Enter lab total: 65.7 Enter midterm #1 score: 83.5 Enter midterm #2 score: 87.2 Enter final exam score: 76.8
After obtaining the input. you will print out each score, the course total, and your letter grade.
When determining the letter grade, you are not allowed to use If statements, switches, or any other conditionals. You should be able to obtain print out the letter grade using math and type casting.
For the purpose of this Lab, exams are 15% of your grade, projects 25%, labs 15%, final 30% and that you have 5 projects and 13 labs. When determining the letter grade, use the following grading scale.
A: 100-90 B: 89-80 C: 79-70 D: 69-60 F: 59 or below
sample output.
-=-=-=-=-=-=-=-=-=-= Projects: 50.4 Lab: 65.7 Midterm #1: 83.5 Midterm #2: 87.2 Final: 76.8 -=-=-=-=-=-=-=-=-=-= Course total: 476.2 -=-=-=-=-=-=-=-=-=-= Letter Grade: B
All outputs must have 1 decimal place and be left justified like above.
Turn In
***If you are working from home, remember after you think your code is right, compile and then run on lore***
To turn in first remove all the .class files from your Lab04 folder. % pwd /u/u91/yourlogin/CS180/lab04
% rm *.class Next change your current folder to your CS180 folder and run the turnin command. % cd ../
% turnin -v -c cs180=XXX -p lab4 lab04
*Where XXX is your section number (ask your lab TA).*