... Herbert Schildt
Module 11
The C+ + I/O System
Table of Contents
CRITICAL SKILL 11. 1: Understand I/O streams 2
CRITICAL SKILL 11. 2: Know the I/O class hierarchy 3
CRITICAL SKILL 11. 3: Overload ... file functions 29
CRITICAL SKILL 11. 11: Use randon access files I/O 35
CRITICAL SKILL 11. 12: Check I/O system status 37
Since the beginning of this book you have been using the C+ + I/O system, ... ways. The first uses member functions of the ios class. The second uses a
special type of function called a manipulator. We will begin by looking at formatting using the ios
member functions.
CRITICAL...
... Especially emphasize
the “Designer’s Questions” and “Characteristics of a Good Interface
Design” slides because they provide excellent guidance beyond the scope of
the class.
!
Activity 11. 1: ... During the discussion that
follows the activity, create a class consensus design.
!
Selecting the Client Environment
This section provides an overview of the various types of client technologies ... Selection
In this activity, you will facilitate a discussion that focuses on the various issues
associated with selecting client-side technologies and how the user interface
might be influenced...
... Purchasing system
services.
14 Module 11: System Services
Storage Location
The second issue is the location where the log will be stored. The main concern
in the location of a log is the ... Element Description
Pattern name Authentication
Problem Thesystem must authenticate clients and check access on each
method call from a client.
Solution Create an Authenticator class that ... with crossing
layer boundaries.
8 Module 11: System Services
The Authentication Design Pattern
+Login()
+CheckAccess()
Authenticator
+Handle()
Resource
-Token
Client
The Authentication...
... one another.
Exchange 2000 Conferencing Server tracks scheduled conferences and controls
attendee access to conferences. For users, the benefits are single-click access to
conferences and ... access to directory information.
Lightweight Directory Access Protocol (LDAP) is the preferred access
protocol for directory information.
!
Active Directory Connector.
The Active Directory ... the application logic from the client accessing the data means
that you do not have to rewrite the code for every client that may access the
data. It also ensures that the application logic...
... the ADO object model are the Connection
object, the Command object, and the Recordset object.
Connection Object
The Connection object is the highest-level object in the ADO object model. It ...
occurs through the Connection object after a provider error occurs. When data
exists in the Recordset object, you can access the Fields collection and Field
object through the Recordset object. ... Collection (Optional)
Execute Method
Execute Method
Active Connection Property
Source Property
Errors Collection (Optional)
Fields Collection
Parameters Collection
Command
(Optional)
ADO objects provide...
...
rào c n. Một rào c n bu c tất ccc quy trình để chờ đợi cho đến khi tất ccc quá trình đạt đến ngưỡng và
sau đó phát hành tất ccc quá trình. Một th c hiện điển hình c a một rào c n c ... Nó cthể sau đó, ho c cập nhật cc biến khóa trong bộ nhớ cache c a bộ xử lý đư c lựa chọn
ho c vô hiệu sao chép, gây ra cc bộ vi xử lý bỏ lỡ và lấy một bản sao c a khóa.
Khóa xếp hàng c ... nguyên tử, chúng ta cthể sử dụng cc cơ chế đa gắn kết để
th c hiện cc ổ khóa quay: ổ khóa mà một bộ xử lý liên t c cố gắng để c đư c, quay xung quanh một
vòng lặp cho đến khi nó thành c ng
Nếu...
... selected, the navigation routines process that
user action.
A user action to one control might also affect other controls. For example, if a
user selects a check box, other options might become ... Specialized Clients
In this section
In this section
The final part of designing the user interface is selecting the client for the
application. At one time, long ago, the only choice for ... interface, of the elements
of the interface, and of thesystem action. These cues could be implemented in
three ways. Visual cues include progress bars and the Windows hourglass;
audio cues include...
... The Authenticator class also has a CheckAccess
method. Each time the client calls a method on a system object
(here called a resource), the client passes its token to the object.
The object ... to:
!
Describe the logical design of a system services layer.
!
Describe the functionality of authentication.
!
Describe the functionality of a search.
!
Describe the functionality of ... service or system
infrastructure functionality. Typically, any layer in the architecture can use the
system services layer. Examples of system services include page caching,
auditing, and searching....
... the same. But there are situations where one or the other is specifically
called for. For instance, consider the function squeeze(s ,c) , which removes all occurrences
of the character c from the ... no
copying of array elements. By subscripting this value, the function can access and alter any
argument of the array. This is the topic of the next section.
1.9 Character Arrays
The most common ...
A character constant is an integer, written as one character within single quotes, such as
'x'. The value of a character constant is the numeric value of the character in the machine's
character...
... satisfied with the efficacy of the study medi-
cation on their child's attention. The majority of caregiv-
ers (93.1%) indicated a high level of satisfaction with the
duration of effect of the study ... objectives of this study, caregiver-reported
HRQL and medication satisfaction were assessed using
the ADHD Impact Module- Child (AIM -C) and a Medica-
tion Satisfaction Survey (MSS).
The AIM -C is ... evaluation of the
child with attention-deficit/hyperactivity disorder. Pediatrics
2000, 105 :115 8 -117 0.
4. Barkley RA, Fischer M, Edelbrock CS, Smallish L: The adolescent
outcome of hyperactive children...
... extern.
In certain circumstances, the extern declaration can be omitted. If the definition of the external variable occurs
in the source file before its use in a particular function, then there is ... file3 to connect the occurrences of the variable. The usual practice is to collect
extern declarations of variables and functions in a separate file, historically called a header, that is included ... of communicating data between functions is for the calling function to provide a list of values, called
arguments, to the function it calls. The parentheses after the function name surround the...
... System (QMS) is seen as necessary tools to perform
quality management functions. It attaches to the operations of the process and is built
in accordance with the characteristics of the products ... an effective
communication system needs to be set up to ensure effective operation of the quality
management system. Viet A plastic and composite company also created a system
communication, however, ... process
approach, it means that they manage the processes that make up their organization, the
interaction between these processes, and the inputs and outputs that glue these
processes together....
... designing C. to be designed D. to design
5. Teachers have been asked to concentrate on literacy.
A. the ability to write books B. good knowledge of literature
C. basic skills in mathematics D. the ... (F):
1. The speaker’s known James for 15 years
2. They studied at the same school.
3. The speaker went to Scotland in 1970s.
4. These days the speaker usually sees James in the park.
5. The speaker ... his help?
A. being called B. calling C. to be called D. to call
3. I remember ___________ to the zoo when I was a child.
A. being taken B. taking C. to be taken D. to take
4. The tin opener seems...