cs102 lab9

cs102 lab9

http://www.maths.nuigalway.ie/~gettrick/teach/cs102/labs/l9.html

For this lab you must submit all source code (python files), and, if applicable, the result(s) of running the program on (a few) test cases. This should be sent in via BLACKBOARD (not directly by email). The source code must be well presented (indenting, spaces, reasonable variable/function names, etc.) and must include comments (as a rough guideline - aim to have nearly as many comments as lines of code). Any questions asked should be answered by typing the answers into the relevant box on the BLACKBOARD upload form.
This material should be uploaded before the deadline of 5pm Friday March 22nd., 2013. You will lose 20% for each day (or part of day) the lab is late.
Plagiarism (the unattributed copying of work from other sources (internet, fellow students,....)) will not be tolerated. Please see http://www.nuigalway.ie/engineering/documents/plagiarism_guide_students _v4.pdf. You risk getting zero for your lab if it is found to be plagiarized.

We would like to model a mug/cup as a cylindrical vessel with an open top. The mug will have a fixed total capacity (the volume of a cylinder, C=PI*r**2*h), and at any given time a certain amount of liquid will be in it (varying from 0 to C) at a certain temperature. Thus, the state of the cup at any given time can be represented by four parameters, its radius, height, current volume of liquid and the temperature of the liquid. Write a class in python to represent the mug. The class should have

A constructor (__init__) to create a mug of a certain radius and height. By default set the volume of liquid in the mug to be zero at the start, and its temperature to be 20 degrees.

A method that returns the volume of liquid currently in the mug. (Note: All lengths should be in centimetres, and volumes in milliliters: 1 cubic centimetre equals 1 milliliter.)

A method that returns the capacity of the mug.

A method that tells the user "how full" (in percentage terms) the cup is.

A method that adds a certain volume (say V₁) of liquid at a certain temperature (say T₁). If there is currently some (other) liquid volume V₂ in the mug at temperature T₂, you should set the final liquid temperature to be (V₁*T₁ + V₂*T₂)/(V₁ + V₂). If the volume of liquid being added does not fit in the cup, you should of course warn the user (and... let them chose between cancelling the operation or just filling it to capacity).

A method that removes ("pours out") a certain volume of liquid from the mug (again... if the volume requested for removal is greater than the current volume, the user should have the option of cancelling the operation or emptying all the mug).

A "fill to brim" method that fills the mug to its capacity (with the same liquid/temperature as is currently in the mug). This method must call the method you have written in (5.).

All your methods, the constructor, and the class itself, should have appropriate docstrings. You should test your methods well (by calling them from the main program), to make sure they work as planned.