- I
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- identifier
- (1) One or more characters used to identify or name a
data element and possibly to indicate certain properties
of that data element. ANSI. (2) In programming
languages, a token that names a data object such as a
variable, an array, a record, a subprogram, or a
function. ANSI. (3) A sequence of letters,
digits, and underscores used to identify a data object or
function. IBM.
- if statement
- A conditional statement that contains the keyword if,
followed by an expression in parentheses (the condition),
a statement (the action), and an optional else clause
(the alternative action). IBM.
- implementation
- The hidden attributes and operations of an object. The
implementation typically includes a description of the
data structure of an object, definitions of the methods
that access that data structure, and information about
the type of the object.
- implementation class
- A class that implements a concrete class. Implementation
classes are never used directly.
- import library
- In the OS/2 and Windows platforms, stub for a dynamic
link library to resolve references at run time. An import
library file has the file extension .lib.
- include directive
- A preprocessor directive that copies the text of an
included file into the file containing the directive.
- include file
- A text file that contains declarations used by a group of
functions, programs, or users. See header file. IBM.
- included source
file
- A source file defined for the project through #include
statements in other source files. Included source files
may be processed more than once during compilation. See primary source file,
source file.
- include statement
- In the C and C++ languages, a preprocessor statement that
causes the preprocessor to replace the statement with the
contents of a specified file. IBM.
- incomplete class declaration
- A class declaration that does not define any members of a
class. Typically, an incomplete class declaration is used
as a forward declaration.
- incomplete type
- A type that has no value or meaning when it is first
declared. There are three incomplete types: void, arrays
of unknown size, and structures and unions of unspecified
content. A void type can never be completed. Arrays of
unknown size and structures and unions of unspecified
content can be completed in further declarations.
- indirection
- (1) A mechanism for connecting objects by storing, in one
object, a reference to another object. (2) In the C and
C++ languages, the application of the unary operator * to
a pointer to access the object the pointer points to.
- inheritance
- (1) An object-oriented programming technique that allows
the use of existing classes as bases for creating other
classes. (2) A mechanism by which a derived class can use
the attributes, relationships, and member functions
defined in more abstract classes related to it (its base
classes). See multiple
inheritance.
- initializer
- An expression used to initialize objects. In the C++
language, there are three types of initializers:
- An expression followed by an assignment operator
is used to initialize fundamental data type
objects or class objects that have copy
constructors.
- An expression enclosed in braces ( { } ) is
used to initialize aggregates.
- A parenthesized expression list is used to
initialize base classes and members that use
constructors.
- inline function
- (1) In C++, a member function defined in the class
declaration. (2) A function call that the compiler
replaces with the actual code for the function. The
keyword inline can be used to hint to
the compiler to perform inline expansion of the body of a
member or nonmember function.
- inline
- To replace a function call with a copy of the function's
code during compilation.
- input stream
- A sequence of control statements and data submitted to a
system from an input unit. IBM.
- instance (of a class)
- An object that is a member of that class. An object
created according to the definition of that class.
- instance number
- A number that the operating system uses to keep track of
all of the instances of the same type of device. For
example, the amplifier-mixer device name is AMPMIX plus a
2-digit instance number. If a program creates two
amplifier-mixer objects, the device names could be
AMPMIX01 and AMPMIX02.
- instantiate
- To create or generate a particular instance or object of
a data type. For example, an instance box1 of
class box could be instantiated with the
declaration:
box box1;
- instruction
- A program statement that specifies an operation to be
performed by a computer and that identifies data involved
in the operation. IBM.
- instruction scheduling
- An optimization technique that reorders instructions in
code to minimize execution time.
- integer
- A positive or negative whole number or zero.
- integer constant
- A decimal, octal, or hexadecimal constant.
- integral object
- In the C language, a character object, an object having
an enumeration type, an object having variations of the
type int, or an object that is a bit field.
- interactive graphics
- Graphics that a user at a display device can move or
manipulate.
- interactive video
- A combination of video and computer technology in which
the user's actions, choices, and decisions affect the way
in which the program unfolds.
- internal data definition
- A description of a variable appearing in a block that
directs the system to allocate storage for that variable
and makes that variable accessible to the current block
after its point of declaration.
- internationalization
- The process of producing a computer program (design and
code) that is totally free of any dependency on language,
culture, script, and coded character sets. Strictly
speaking, an internationalized product is not usable in
any region of the world unless it is localized to that
specific region. Also known as national language
enablement. See localization.
- interrupt
- A temporary suspension of a process caused by an external
event, performed in such a way that the process can be
resumed.
- intersection
- Given collections A and B, the set of elements that is
contained in both A and B.
- intrinsic function
- A function supplied by the run-time library. Intrinsic
functions may be inlined. Contrast with built-in function.
- I/O Stream Library
- A class library that provides the facilities to deal with
many varieties of input and output.
- iteration
- The process of repeatedly applying a function to a series
of elements in a collection until some condition is
satisfied.
- iteration order
- The order in which elements are accessed when iterating
over a collection. In ordered collections, the element at
position 1 will be accessed first, then the element at
position 2, and so on. In sorted collections, the
elements are accessed according to the ordering relation
provided for the element type. In collections that are
not ordered, the elements are accessed in an arbitrary
order. Each element is accessed exactly once.
- iterator class
- A class that provides iteration functions.
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