... language source file
.cc, .cpp C+ + language source file
.h Header file
.m Objective -C source file
.mm Objective -C+ + source file
.pl Perl source file
.o Object (compiled) file
Objective -C source files ... ptg999
30
Chapter 3 Classes, Objects, and Methods
[myWindow erase]; Clear the window
theArea = [myRect area];
Calculate the area of the rectangle
[userText spellCheck];
Spell-check some text
[deskCalculator ... name implies: go to a new line.Any characters to be printed after
the newline character then appear on the next line of the display. In fact, the newline
character is very similar in concept...
... and Methods
[myWindow erase]; Clear the window
theArea = [myRect area];
Calculate the area of the rectangle
[userText spellCheck];
Spell-check some text
[deskCalculator clearEntry];
Clear the last ... the newline character.A newline character tells the system to
do precisely what its name implies: go to a new line.Any characters to be printed after
the newline character then appear on the next ... the
beginning of the comment.These types of comments have to be terminated.To end the
comment, you use the characters * and /, again without any embedded spaces.All charac-
ters included between...
... data
type. Returning characters in integer format allows the end-of-file
(EOF)
Sentinel
previously described in Section 5.2 to be returned. The
EOF
sentinel has an inte-
ger code. If this sentinel is ... be correctly recognized as input, get char ( ) must
return integer values. The get char ( ) routine is used to return the next single
character entered at the terminal. For example, a statement ... second and third elements are compared. Again, if the second
element is larger than the third, these two elements are interchanged. This pro-
cess continues until the last two elements have been...
... structures. Any changes made to the local
temp
structure in
calc_net ( )
are not reflected in the
emp
structure of
main ( ).
In fact, since
both structures are local to their respective functions, ... feature.
491
486
Chapter Twelve Structures
of
date.
Individual members in the
person
structure are accessed by preceding
the desired member with the structure name followed by a period. For example,
person. ... to
initially access "the structure whose address is in
pt."
This is followed by a refer-
ence to access the desired member within the structure. In the absence of the
parentheses, the...
... since there is a one-to-one correspondence between integers and user-
defined data types, the cast operator can either coerce integers into a user-speci-
fied data value or coerce a user-specified ... uppercase names in #define statements. In fact, the equiva-
lence produced by a typedef statement can frequently be produced equally
well by a #define statement. The difference between the two, ... encountered by the preprocessor, the symbolic name
CONVERTis replaced by the equivalent text 2.0
*
3.1416. The compiler always
receives the expanded version after the text has been inserted in...
... typically not done.
The
methodDefinitions
part of the @implementation section contains the code for
each method specified in the
@interface section. Similar to the @interface section,
each method’s ... each section yourself.As you’ll see, each section is typically put in its
own file. For now, however, we keep it all together in a single file.
The @interface Section
When you define a new class, ... Methods
Instances and Methods
A unique occurrence of a class is an instance, and the actions that are performed on the in-
stance are called methods. In some cases, a method can be applied to an instance...
... discusses methods for storing characters from extended character sets, through
special escape sequences, universal characters, and wide characters.
The character constant ’\n’, the newline character, ... cal-
culator can hold only so many digits, thus the inherent inaccuracy of the machine.The
same type of inaccuracy applies here: Certain floating-point values cannot be exactly rep-
resented inside the computer’s ... Develop methods to set the rectangle’s width and height,
retrieve these values, and calculate the rectangle’s area and perimeter.Assume that
these rectangle objects describe rectangles on an integral...
... apoptotic cells detected are shown for three cell lines,
transfected with different scFv fragments using annexin V and Hoe-
chst 33342 combined staining. The results represent the mean from
three different ... measure the proteasome activity in transfected cells, we
developed an experimental protocol based on the degrada-
tion of an ectopically expressed protein specifically degraded
by the UPS.
We ... transfected cells in different cell lines (Fig. 1
and Table 1). Interestingly, most of the apoptotic cells show
clearly defined immunoreactive scFv aggresomes, shrink,
and exhibit condensed chromatin...
... main difference between client/server and web technolo-
gies as they relate to database access?
5. If a field is defined as NULL, does something have to be entered into
that field?
Exercises
1. ... databases to generate the examples. We decided to concentrate on
these three database implementations because they allow freely distributed
versions of their database to be available. This enables you ... for
examples, quiz questions, and exercises in this book. Each table is identi-
fied by the table name as well as each residing field in the table. Follow the
mapping lines to compare the specific...
... even if the call-
ing code is prepared to handle the exception.
■ Beware of throwing pointers to local objects—otherwise, dangling references may be
passed to the exception handler.
■ In general, ... full, modern C+ +.
C+ + has many obscure and complex features. For example, inheritance hierarchies tend
to be overused. Remember, code needs to be understood, maintained, and extended by
others not ... user to enter the number of lines to be read. Echo
the strings read to cout.
3. Redo the preceding exercise to end when the input is a special sentinel string. For
example, you may use an empty...
...
not in the reference
type.
c) variables of the reference types
directly contain their data, whereas
variables of the value types store
references to objects.
b) data in the value type ...
variable is easily
accessible.
d) Variables of the value types
directly contain their data,
whereas variables of the
reference types store references
to objects.
54. What would be the output ... methods can act as a constructor for the class
“Employee” that is used to create an object?
[1.0]
a) void employee(int enmpno){} c) employee(int empno){}
b)
Employee (){}
d)
Employee(int...
... Which of the following statements correctly differentiates between delegate
and an interface?
[2.0]
a) Delegates can be used without the
object reference but interface cannot be.
c) Unlike ... emps[1]=Employee.getEmpId(2);
14. foreach(Employee ein emps)
15. System.Console.WriteLine (e. EmployeeId);
16. }
}
a) The code will generate a null exception,
as the employees are not initialized. ... a correct event that is based on the delegate
named “ MyDelegate”
[1.0]
a) public event MyDelegate MyEvent(); c) private event
MyDelegate
MyEvent();
b)
public event MyDelegate MyEvent;...