Homework 11-30-2007

1. Do Temperature Project, which is Project 7 (3rd, 2nd ed.) or Project 3 (1st ed.).
2. Do Lab Counter.

1. Write a Temperature class that has two instance variables: a temperature value(a floating-point number) and a character for the scale, either C for Celsius or F for Fahrenheit. The class should have four constructor methods: one for each instance variable(assume zero degrees if no value is specified and Celsius if no scale is specified), one with two parameter for the two instance variable, and a no-argument constructor (set to zero degrees Celsius). Include the following:

(1) two accessor methods to return the temperature, one to return the degrees Celsius, the other to return the degrees Fahrenheit, use the following formulas to write the two methods, and round to the nearest tenth of a degree:

degreesC = 5(degreesF - 32) / 9.
degreesF = (9(degreesC) /5 ) + 32.

(2)three mutator methods: one to set the value, one to set the scale(F or C), and one to set both;

(3) three comparison methods: an equals method to test whether two temperatures are equal, one method to test whether one temperature is greater than another, and one method to test whether one temperature is less than another(note that a Celsius temperature can be equal to a Fahrenheit temperature as indicated by the above formulas); and

(4) a suitable toString method.

Then write a driver program(or programs) that tests all the methods. Be sure to use each of the constructors, to include at least one true and one false case for each of the comparison methods, and to test at least the following temperature equalities:

*1. 0.0 degrees C = 32.0 degrees F.
*2. -40.0 degrees C = -40.0 degrees F.
*3. 100.0 degrees C = 212.0 degrees F.



2. My Lab Counter