Exam 10: Classes and Data Abstraction

In C++,class is a reserved word and it defines only a data type.

In C++ terminology,a class object is the same as a class instance.

Non-static member variables of a class are called the ____________________ variables of the class.

A C++ implementation file has the extension ____________________.

A(n)____________________ statement is required by any program that uses a header class file,as well as by the implementation file that defines the operations for that class.

If an object is declared in the definition of a member function of the class,then the object can access both the public and private members of the class.

Figure 2: class rectangleType { public: $\quad$ void setLengthWidth(double x, double y); $\quad$$\quad$ //Postcondition: length = x; width = y; $\quad$ void print() const; $\quad$$\quad$ //Output length and width; $\quad$ double area(); $\quad$$\quad$ //Calculate and return the area of the rectangle; $\quad$ double perimeter(); $\quad$$\quad$ //Calculate and return the parameter; $\quad$$\quad$ rectangleType(); $\quad$$\quad$ //Postcondition: length = 0; width = 0; $\quad$ rectangleType(double x, double y); $\quad$$\quad$ //Postcondition: length = x; width = y; private: $\quad$ double length; $\quad$ double width; }; -Consider the accompanying class definition in Figure 2.Which of the following variable declarations is correct?

Given the declaration class myClass { public: void print(); //Output the value of x; MyClass(); private: int x; }; myClass myObject; The following statement is legal. myObject.x = 10;

The header file is also known as the ____________________.

If an object is created in a user program,then the object can access both the public and private members of the class.

In C++,the scope resolution operator is ____.

Classes were specifically designed in C++ to handle ____________________.

The public members of a class must be declared before the private members.

Object code is produced from a(n)____________________.

A destructor has the character ____,followed by the name of the class.

-How many destructors can a class have?

A ____ sign in front of a member name on a UML diagram indicates that this member is a protected member.

Figure 1: -Consider the UML class diagram shown in the accompanying figure.According to the UML class diagram,how many private members are in the class?

If a function of a class is static,it is declared in the class definition using the keyword static in its ____.

What does ADT stand for?