COSC 1437 Programming Fundamentals IIBy FirstName LastName
14
More about Classes
Exercise 1:
Write a full class definition for a class named Counter, and containing the following members:
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A data member counter of type int.
A data member named limit of type int.
A static int data member named nCounters which is initialized to 0.
A constructor that takes two int arguments and assigns the first one
to counter and the second one to limit. It also adds one to
the static variable nCounters
A member function called increment that accepts no parameters and
returns no value. If the data member counter is less
than limit, increment just adds one to the instance variable counter.
A member function called decrement that accepts no parameters and
returns no value. If counter is greater than zero, decrement subtracts one from
the counter.
A member function called getValue that accepts no parameters. It returns the value
of the instance variable counter.
A static function named getNCounters that accepts no parameters and return
an int. getNCounters returns the value of the static variable nCounters.
Exercise 2:
Define a class named Window with the following members:
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An int member variable named width
An int member variable named height
A constructor that accepts two int arguments. The first argument should be assigned to
width and the second argument should be assigned to height.
• The Window class should declare the areSameSize function, described below, as a
friend.
Outside of the Window class, write a function named areSameSize that accepts two Window
objects as arguments, and returns a bool indicating whether the two Window objects are the
same size. Two Window objects are the same size if their widths and heights match.
Exercise 3:
Assume that a class named Window has been defined, and it has two int member variables
named width and height.
Write a function that overloads the