programming in objective c 4th edition developer library pdf

... programming in Objective-Crests on the extensive frameworks that are available Chapter 2,“Programming in Objective-C,” begins by teaching you how to write yourfirst program in Objective-C Because ... approach First, learning the entire C language be-fore learning Objective-C is wrong C is a procedural language containing many features that are not necessary for programming in Objective-C, especially ... resulting from the use of the informa-tion contained herein. 1 Objective-C (Computer program language) 2 Object-oriented programming (Computer science) 3 Macintosh (Computer) Programming. I

Ngày tải lên: 12/08/2014, 23:22

... thebackslash character is a special character in the Objective-C system and does not actuallycount as a character In other words, the Objective-C compiler treats the character ’\n’as a single character, ... semicolon, and the third is the character zero—which is not the same as thenumber zero Do not confuse a character constant, which is a single character enclosed insingle quotes, with a C-style character ... @character is an NSStringcharacter string ject ob-NoteAppendix B discusses methods for storing characters from extended character sets, through special escape sequences, universal characters,

Ngày tải lên: 12/08/2014, 23:22

... [[NSAutoreleasePool alloc] init]; Fraction *f1 = [[Fraction alloc] init]; Fraction *f2 = [[Fraction alloc] init]; Fraction *fracResult; Complex *c1 = [[Complex alloc] init]; Complex *c2 = [[Complex alloc] init]; ... alloc] init]; Rectangle *myRect = [[Rectangle alloc] init]; XYPoint *myPoint = [[XYPoint alloc] init]; Trang 5172 Chapter 8 Inheritance100 200 x y myPoint Figure 8.5 The XYPoint myPoint in memor ... declare aRectanglevariable called myRectin your program, the compiler checks that any methods you invoke onmyRectaredefined in theRectangleclass or are inherited from its superclass NoteCertain

Ngày tải lên: 12/08/2014, 23:22

... defined( GNUC ) #define NS_INLINE static inline_attribute_((always_inline)) #elif defined( MWERKS ) || defined( cplusplus) #define NS_INLINE static inline Trang 27Another common use of #ifis in ... @protocol Drawing3D <Drawing> Finally, a category also can adopt a protocol, like this: @interface Fraction (Stuff) <NSCopying, NSCoding> theNSCopyingandNSCodingprotocols As with class names, ... new category and some methods muddies the definition of the class and is notgood programming practice category can exist in a given Objective-C namespace.This can be tricky because the jective-C

Ngày tải lên: 12/08/2014, 23:22

... alloc] init]; void copyString (char *to, char *from); char string1[] = “A string to be copied.” 2 ; char string2[50]; copyString (string2, string1); charac-copyString.This reflects how the function ... previous character in text(assuming, of course, that textPtrwas not pointing to the beginning of textbefore this statement executed) Comparing two pointer variables in Objective-C is perfectly valid.This ... given by*intPtras an integer Unions One of the more unusual constructs in the Objective-C programming language is the union.This construct is used mainly in more advanced programming applications

Ngày tải lên: 12/08/2014, 23:22

... @”jbaker@kochan-wood.com”; AddressCard *card1 = [[AddressCard alloc] init]; AddressCard *card2 = [[AddressCard alloc] init]; AddressCard *card3 = [[AddressCard alloc] init]; AddressCard *card4 = ... *bName = @”Tony Iannino”; NSString *bEmail = @”tony.iannino@techfitness.com”; AddressCard *card1 = [[AddressCard alloc] init]; AddressCard *card2 = [[AddressCard alloc] init]; [card1 setName: aName ... AddressCard *card2 = [[AddressCard alloc] init]; AddressCard *card3 = [[AddressCard alloc] init]; AddressCard *card4 = [[AddressCard alloc] init]; AddressBook *myBook = [AddressBook alloc]; AddressCard

Ngày tải lên: 12/08/2014, 23:22

... stringWithString:was sent to the NSMutableStringclass, indicating that the string’scontents might have changed during the course of the program’s execution And becauseconstant character strings can’t ... reference count for myIntis matically decremented to 1 In general, removing an object from any collection has theside effect of decrementing its reference count.This implies that the following code ... garbage collection is on, methodcalls such as retain,autorelease, andreleaseare ignored Trang 20Copying Objects This chapter discusses some of the subtleties involved in copying objects.We introducethe

Ngày tải lên: 12/08/2014, 23:22

... not currently se- lected, click the label you just created to select it. Notice that the Inspector window auto- matically changes to give you information about the currently selected object in ... Writing iPhone Applications @property (nonatomic, retain) UIWindow *window; @property (nonatomic, retain) Fraction_CalculatorViewController *viewController; @end The UIWindow instance variable window ... the discipline of objectoriented programming In the latter case, I provide the meaning of the term as it specifically applies to the Objective-C language abstract class A class defined to

Ngày tải lên: 12/08/2014, 23:22

... class, but not cate-by any subclasses This restricts access to the class self. it-@public By instance methods in the class, in-stance methods in subclasses, and instance methods in category exten- ... an initial value Trang 20scope of an instance variable After these directives appear, they remain in effect until theclosing curly brace ending the declaration of the instance variables is encountered ... summarized in Table B.6 Table B.6 Scope of Instance Variables If variable is clared after this directive de- then it can be referenced Comments @protected By instance methods in the class, instance

Ngày tải lên: 12/08/2014, 23:22

... computer 8 C Processing 9 C both what is to be calculated and how to calculate it 10 C entering the input items, then processing the input items, and then displaying, printing, or storing the output ... https://findtestbanks.com/download/an-introduction-to-programming-with-c-4th-edition-by-zak-solution-manual/ Link full download test bank: https://findtestbanks.com/download/an-introduction-to-programming-with-c-4th-edition-by-zak-test-bank/ ... discount rate 2 calculate the discount by multiplying the original price by the discount rate 3 calculate the sale price by subtracting the discount from the original price 4 display the discount

Ngày tải lên: 01/03/2019, 09:07

... function call or function invocation #include directive Trang 394 Function BasicsUsually, all you need do to use a library is to place an include directive and a using directive for that library ... function must contain the following two directives: #include <cstdlib> using namespace std; Display 3.3 A Function Call for a Predefined void Function 1 #include <iostream> 2 #include ... a function call or function invocation An argument in a function call can be a constant, such as 9.0, a variable, or a more compli-cated expression A function call is an expression that can be

Ngày tải lên: 04/07/2014, 05:21

... subsection tells you how to define void functions Display 3.5 contains a sample function definition in a complete program that demon-strates a call to the function The function is called totalCost ... is called the function declaration or function prototype The following is the function declara-tion (funcdeclara-tion prototype) for the funcdeclara-tion defined in Display 3.5: double totalCost( ... items purchased: 2 Enter the price per item: $10.10 2 items at $10.10 each. Final bill, including tax, is $21.21 Function declaration; also called the function prototype Function call Function body

Ngày tải lên: 04/07/2014, 05:21

... body. You can call this technique the black box principle or the principle of procedural abstraction or information hiding. The three terms mean the same thing. Whatever you call this principle, ... Writing and using functions as if they were black boxes is also called procedural abstraction. When programming in C++ it might make more sense to call it func- tional abstraction. However, procedure ... should not include a call to main in your code. Only the system should call main, which it does when you run your program. 116 Function Basics Self-Test Exercises ■ RECURSIVE FUNCTIONS C++ does

Ngày tải lên: 04/07/2014, 05:21

... within the inner block and cannot be accessed outside that inner block The other variable exists only in the outer block and cannot be accessed in the inner block The two variables are distinct, ... within the inner block and cannot be accessed outside of the inner block The other variable exists only in the outer block and cannot be accessed in the inner block The two variables are distinct, ... run (assuming everything else is correct) The program will give the correct output (assuming everything else is correct) 22 The comment explains what action the function takes, including any value

Ngày tải lên: 04/07/2014, 05:21

... 14, because 1 foot and 2 inches is the same as 14 inches Will the following function perform correctly? If not, why not? double totalInches(int feet, int inches) { inches = 12*feet + inches; ... finished 7 In cold weather, meteorologists report an index called the wind chill factor, which takes into account the wind speed and the temperature The index provides a measure of the chilling ... getNumbers(int& input1, int& input2); The call-by-reference formal parameters input1 and input2 are placeholders for the actual arguments used in a function call Now consider a function call

Ngày tải lên: 04/07/2014, 05:21

... following program? #include <iostream> using namespace std; void figureMeOut(int& x, int y, int& z); int main( ) { int a, b, c; a = 10; b = 20; c = 30; figureMeOut(a, b, c); cout ... ExercisesTip THINK OF ACTIONS, NOT CODE Although we can explain how a function call works in terms of substituting code for the function call, that is not the way you should normally think about a function ... (in inches): 13 Enter the price of a large pizza: $14.75 Small pizza: Diameter = 10 inches Price = $7.50 Per square inch = $0.10 Large pizza: Diameter = 13 inches Price = $14.75 Per square inch

Ngày tải lên: 04/07/2014, 05:21

... 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 ... 429 Using NSData to Create Custom Archives 436 Using the Archiver to Copy Objects 439 Exercises 441 20 Introduction to Cocoa and Cocoa Touch 443 Framework Layers 443 Cocoa Touch 444 21 Writing ... entire C language before learning Objective- C is wrong. C is a procedural language containing many features that are not necessary for programming in Objective- C, especially at the novice level. In fact,...

Ngày tải lên: 18/02/2014, 12:20

... Vectors are defined in the library vector, which places them in the std namespace. Thus, a file that uses vectors would include the following lines: #include <vector> using namespace ... this approach of reallocating capacity in large chunks is more efficient than allocating numerous small chunks. You can completely ignore the capacity of a vector and that will have no effect on what ... "Enter account balance (include cents even if .00) $"; cin >> dollars; cin >> point >> digit1 >> digit2; accountDollars = dollars; accountCents = digitToInt(digit1)*10...

Ngày tải lên: 04/07/2014, 05:21

... dollars*100; int allCents2 = secondOperand.cents + secondOperand.dollars*100; int diffAllCents = allCents1 - allCents2; int absAllCents = abs(diffAllCents); int finalDollars = absAllCents/100; int ... simple overloading). Be sure to notice that the second declarations of f has two occurrences of const. You must include both occurrences of const. The ampersand signs & are of course also ... Overloading, Friends, and References Display 8.6 Overloading ++ (part 1 of 2) 1 #include <iostream> 2 #include <cstdlib> 3 using namespace std; 4 class IntPair 5 { 6 public: 7 IntPair(int...

Ngày tải lên: 04/07/2014, 05:21

... whitespace character. Whitespace characters are all the characters that are displayed as blank space on the screen, including the blank character, the tab character, and the newline character, ’\n’. ... "Enter a line of input:\n"; cin.get (c1 ); cin.get (c2 ); cin.get (c3 ); cin.get (c4 ); cout << c1 << c2 << c3 << c4 << "END OF OUTPUT"; If the dialogue begins ... the newline character ’\n’, you can use the ignore member function. For example, the following will skip over all input characters up to and including the newline character, ’\n’: cin.ignore(1000,...

Ngày tải lên: 04/07/2014, 05:21