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Exercise 9a

Download the C# project TinyFacebook from the class website.

This exercise is about using and modifying an existing class. The

solution contains a new class called Status, in the file Status.cs.

1. Have a look inside the file Status.cs, and see what the Status

class definition contains. See if you can identify the instance

fields, the constructor, the methods that return information

(accessors), and the methods that change the value of an

instance field (mutators)

2. Now try to use the Status class yourself. Insert some code

into the solution (in InsertCodeHere.cs), that does the

following:

a. Creates a new Status object.

b. Prints out some information about the Status object:

The status text, the number of likes, and the number of

dislikes. In order to do this, you need to call some

method on the Status object.

c. Makes some calls of the methods which change the

number of likes and dislikes.

d. Prints out the information again – now you should see

that the information has changed

3. After this, we decide that we want to keep track of the

number of times the status has been read. To do this, we

need to add code to the Status class. More specifically, you

need to:

a. Add a new instance field numberOf Reads to store the

number of times a status has been read

b. Update the constructor to give this instance field an

initial value (what seems like an obvious initial value?)

c. Add a new method ReadStatus, that will increase the

number of times the status has been read by one (Hint:

The method will be very similar to the AddOneLike

method)

d. Add a method GetNumberOfReads, that will return the

value of the new instance field

e. Update your test code, so the new methods are tested

as well.

4. [Extra – only if you have time] Add a method ReadStatus- Multiple, that will increase the number of times the status

has been read with a number given by the user (Hint: The

method will then need to take this number as a parameter).