CS3376 Structures
struct Employee { string name; int idNum; }; In this declaration, idNum is
a member
Which of the following assigns a value to the hourlyWage member of employee[2]?
employee[2].hourlyWage = 100.00;
A declaration for an enumerated type begins with this key word
enum
enum Tree { OAK, MAPLE, PINE }; What is the value of the following relational expression? OAK > PINE
false
You may use a pointer to a structure as a
function parameter, structure member, or function return type
Passing a structure as a constant reference parameter to a function
guarantees not to result in changes to the structure's members
This is required after the closing brace of the structure declaration.
semicolon
enum Tree { OAK, MAPLE, PINE }; In memory, what value will the MAPLE enumerator be stored as?
1
If a is a structure variable and p, a pointer, is a member of the structure, what will the following statement do? cout << *a.p;
Output the dereferenced value pointed to by p
struct Employee { string name; int idNum; }; In this declaration, Employee is
a tag
Data types that are created by the programmer are known as
abstract data types (ADTs)
This describes only the general characteristics of an object.
abstraction
Members of a(n) __ union have names, but the union itself has no name.
anonymous
When a structure is passed __ to a function, its members are not copied.
by reference
A structure __ contain members of the same data type.
can
Which of the following statements outputs the value of the gpa member of element 1 of the student array?
cout << student[1].gpa;
Before a structure can be used, it must be
declared
If an anonymous union is declared globally (outside all functions), it must be
declared static
If Circle is a structure tag, the statement Circle *pcirc;
declares a structure pointer called pcirc
This allows you to access structure members
dot operator
With an enumerated data type, the enumerators are stored in memory as
integers
What does bookList[2].publisher[3] = 't'; do?
it stores the character 't' in the fourth element of the publisher member of booklist[2].
A function __ return a structure.
may
The name of the structure is referred to as its
none of these
If Circle is a structure tag, the statement Circle doSomething(Circle c2) can be the header line for a function that
takes a Circle structure as a parameter, does something, and returns a Circle structure
A structure pointer contains:
the address of a structure variable
To dereference a structure pointer, the appropriate operator is
the structure pointer operator, ->
A good reason to pass a structure as a constant reference is
to prevent changes to the structure members
This is like a structure, except all members occupy the same memory area.
union
These are examples of C++ primitive data types
unsigned short int, long double, unsigned char
