T
temporary variable
A variable whose
storage is allocated from the stack. The variable is initialized each time
the block in which it
is defined is entered. It exists only during the execution of that block.
test a bit
The operation of
determining whether a particular bit is set. This is not a defined operation
in C++.
test plan
A specification of
the tests that a program must undergo.
text editor
Software used to
create or alter text files.
translation
Creation of a new
program in an alternate language logically equivalent to an existing
program in a source
language.
tree
A hierarchical data
structure.
truncation
An operation on a
real number whereby any fractional part is discarded.
Turbo-C++
A version of the C++
language for personal computers developed by Borland.
typecast
typedef
A operator used to
create new types from existing types.
typing statement
A statement that
establishes the characteristics of a variable.
U
unbuffered I/O
I/O in which each
read or write results in a system call.
union
A data type that
allows different data names and data types to be assigned to the same
storage location.
UNIX
A popular multiuser
operating system first developed by Ken Thompson and Dennis
Ritchie of the Bell
Telephone Laboratories.
unsigned
A qualifier for
specifying int and char variables that do not contain negative numbers.
upgrading (of a
program)
Modification of a
program to provide improved performance or new features.
V
value
A quantity assigned
to a constant.
variable
A name that refers to
a value. The data represented by the variable name can, at different
times during the
execution of a program, assume different values.
variable name
The symbolic name
given to a section of memory used to store a variable.
version
A term used to
identify a particular edition of software. A customary practice is to include
a version number.
Whole numbers indicate major rewrites. Fractions indicate minor
rewrites or
corrections of problems.
virtual
A C++ keyword
indicating that a member function can be overridden by a function in a
derived class.
void
A data type in C++.
When used as a parameter in a function call, it indicates there is no
return value. void * indicates
that a generic pointer value is returned. When used in
casts, it indicates
that a given value is to be discarded.
volatile
A C++ keyword that
indicates that the value of a variable or constant can be changed at any
time. This attribute
is used for memory-mapped I/O, shared memory applications, and other
advanced programming.
W
while
An iterative
statement that repeats a statement as long as a given condition is true.
X
X Window System
A graphics and
windowing system, available from the X Consortium, that is currently
running on many
computing systems.
Z
zero-based counting
A system of counting
where the first object is given the count zero rather than one.
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