objectoriented programming in c net part

... an int data type of a property Which of the following is the correct syntax for declaring an indexer a) protected int this[int var1] c) public int this(int var1) b) public int classname[int index] ... nothing How can we create the object dynamically in C# ? [2.5] a) C# does not allow instantiation c) By using the of objects at run time System.Activator CreateInstance() method to create an instance ... (myObjectType) d) In C# , Object cannot be instantiated at run time but a method of a class can be invoked [2.5] 193 using System.Reflection; using System; class Reflect { public int i=20; public char ch='a';...

Ngày tải lên: 21/07/2014, 21:20

... d) interact with the operating system Which of the following is a correct statement to declare the class “MyClass”? a) Class myclass c) class MyClass b) class Myclass d) Class MyClass Which of ... class Object{ static void main(){} public static Main(){} } } e) class Object{ b) class Object{ static void Main(){}; static void Main(){} } } c) Class Object{ static void Main(){} } Which of the ... program cannot compile because the for statement’s syntax is incorrect using System; class Test { static void Main() { int @Main; int[] Static= new int[3]; @Main =100*Static[1]; Console.WriteLine(@Main);...

Ngày tải lên: 21/08/2012, 15:55

... an int data type of a property Which of the following is the correct syntax for declaring an indexer a) protected int this[int var1] c) public int this(int var1) b) public int classname[int index] ... nothing How can we create the object dynamically in C# ? [2.5] a) C# does not allow instantiation c) By using the of objects at run time System.Activator CreateInstance() method to create an instance ... (myObjectType) d) In C# , Object cannot be instantiated at run time but a method of a class can be invoked [2.5] 193 using System.Reflection; using System; class Reflect { public int i=20; public char ch='a';...

Ngày tải lên: 29/08/2012, 16:37

... void main(){} } d) class Object{ public static Main(){} } b) class Object{ static void Main(){} } [1.5] e) class Object{ static void Main(){}; } c) Class Object{ static void Main(){} } 43 Which of ... Which of the following are correct statements for implementing an abstract class a) public abstract void class ClassA [1.0] c) abstract public ClassA b) public abstract class ClassA 105 Which ... a class b) Static constructors may or may e) A static constructor for a not take parameters class is called automatically when the object is accessed c) A static constructor can have public as...

Ngày tải lên: 09/04/2013, 09:10

... m_socListener.Bind( ipLocal ); //start listening m_socListener.Listen (4); // create the call back for any client connections m_socListener.BeginAccept(new AsyncCallback ( OnClientConnect ),null); cmdListen.Enabled ... EndAccept The EndAccept returns a socket object which represents the incoming connection Here is the code for the callback delegate: public void OnClientConnect(IAsyncResult asyn) { try { m_socWorker ... callback BeginAccept is a non-blocking method that returns immediately and when a client has made requested a connection, the callback routine is called and you can accept the connection by calling...

Ngày tải lên: 18/01/2014, 08:20

... Listing 2-7 demonstrates creating a cancellable task and polling to check for cancellation 17 CHAPTER ■ TASK PROGRAMMING Listing 2-7 Cancelling a Task using System; using System.Threading; using ... Console.ReadLine(); // cancel the task Console.WriteLine("Cancelling task"); tokenSource.Cancel(); 18 CHAPTER ■ TASK PROGRAMMING // wait for input before exiting Console.WriteLine("Main method complete ... a line from the console Console.ReadLine(); // cancel the task Console.WriteLine("Cancelling task"); tokenSource.Cancel(); // wait for input before exiting Console.WriteLine("Main method complete...

Ngày tải lên: 05/03/2014, 21:20

... Creating a Task that you can cancel is a four-step process: Create a new instance of System.Threading.CancellationTokenSource: CancellationTokenSource tokenSource = new CancellationTokenSource ... cancelling tasks, each of which I describe in the following sections Table 2-3 Canceling Tasks Problem Solution Listing Create a cancellable task Get a System.Threading.CancellationToken by creating ... tokens Create a composite cancellation source by calling the CancellationTokenSource.CreateLinkedTokenSource() method 2-11 Poll for task cancellation Check the isCancellationRequested property of CancellationToken...

Ngày tải lên: 06/03/2014, 20:21

... representation of, 24 Strings characters accessed in, 164 comparing, 158 concatenating, 156, 157 escape sequences used in, 29 initializing, 154, 155 inserting and erasing in, 160, 161 numbers converted to, ... Static arrays, 325 Static binding, 551 Static data members, 304, 305 accessing, 306 declaring, 305 definition and initialization, 305 and encapsulation, 307 Static data structures, 463 Static functions, ... 514, 515 SavAcc class defining, 648, 649 scientific manipulator, 65 Scope, 199 Scope resolution operator, 209, 211, 249 Screen control macros, 123, 125 Scrolling string output, 334 search() method,...

Ngày tải lên: 06/07/2014, 17:21

... polymorphic classes In addition to defining virtual functions, dynamic downcasting in polymorphic class hierarchies is introduced Chapter 26 describes how defining pure virtual methods can create ... redefined, how objects are constructed and destroyed, and how access control to base classes can be realized Chapter 24 discusses implicit type conversion within class hierarchies, which occurs in ... of string manipulation These include inserting and erasing, searching and replacing, comparing, and concatenating strings Chapter 10 describes how to write functions of your own The basic rules...

Ngày tải lên: 06/07/2014, 17:21

... 158 Inserting and Erasing in Strings 160 Searching and Replacing in Strings 162 Accessing Characters in Strings 164 Exercises 166 Solutions 168 Chapter 10 Functions 171 Significance of Functions ... Reference Type 228 Defining Pointers 230 The Indirection Operator 232 Pointers as Parameters 234 Exercises 236 Solutions 238 Chapter 13 Defining Classes 243 The Class Concept 244 Defining Classes ... Conversions in Assignments 144 More Type Conversions 146 Exercises 148 Solutions 150 Chapter The Standard Class string 153 Defining and Assigning Strings 154 Concatenating Strings 156 Comparing Strings...

Ngày tải lên: 06/07/2014, 17:21

... data1 function2 data2 function3 Object-oriented concept object1 object2 Properties Properties Capacities Capacities OBJECT-ORIENTED PROGRAMMING ■ ᮀ Traditional Procedural Programming In traditional, ... class defines a certain object type by defining both the properties and the capacities of the objects of that type Objects communicate by sending each other “messages,” which in turn activate ... object representing an account in a program will have properties and capacities that are important for account management OOP objects combine data (properties) and functions (capacities) A class...

Ngày tải lên: 06/07/2014, 17:21

... for correctly interpreting the codes The C+ + language does not stipulate any particular characters set, although in general a character set that contains the ASCII code (American Standard Code ... The character set defines which code represents a certain character When displaying characters on screen, the applicable character codes are transmitted and the “receiver,” that is the screen, ... Standard Code for Information Interchange) is used This 7-bit code contains definitions for 32 control characters (codes – 31) and 96 printable characters (codes 32 – 127) The char (character) type...

Ngày tải lên: 06/07/2014, 17:21

... type ᮀ Character Constants A character constant is a character enclosed in single quotes Character constants take the type char EXAMPLE: 'A' // Type: char The numerical value is the character code ... sequence Escape sequences are described in the following section 26 ■ CHAPTER FUNDAMENTAL TYPES, CONSTANTS, AND VARIABLES ■ ESCAPE SEQUENCES Overview Single character Meaning ASCII code (decimal) ... escape sequences in strings The fact that a string can occupy two lines is another new feature String constants separated only by white spaces will be concatenated to form a single string To continue...

Ngày tải lên: 06/07/2014, 17:21

... // explicit initialization int main() { char ch('A'); // Local variable being initialized // or: char ch = 'A'; cout

Ngày tải lên: 06/07/2014, 17:21

... of cin, cout, // Declaration of self-defined functions and classes long myfunc(int); Source file application.cpp Copy #include #include "myheader.h" int main() { int a; cin >> ... Following these directives, the classes istream and ostream can be used with the cin and cout streams cin is an object of the istream class and cout an object of the ostream class 48 ■ CHAPTER USING ... included in the program’s source code by means of the #include directive, the function can be used immediately Example: #include Following this directive, the mathematical standard functions,...

Ngày tải lên: 06/07/2014, 17:21

... CHAPTER USING FUNCTIONS AND CLASSES ■ USING STANDARD CLASSES Sample program using class string // To use strings #include #include using namespace std; // Declaration of cin, ... identical characters, as the example on the opposite page illustrates ᮀ Calling Methods All the methods defined as public within the corresponding class can be called for an object In contrast to calling ... line of keyboard input in a string Example: getline(cin, s); The keyboard input is terminated by pressing the return key to create a new-line character, '\n', which is not stored in the string...

Ngày tải lên: 06/07/2014, 17:21

... // octal, decimal, and hexadecimal code #include #include // Declaration of cin, cout // For manipulators being called // with arguments #include using namespace ... Output in fixed point notation scientific Output in scientific notation setprecision (int n) Sets the precision to n Methods for precision Manipulator Effects int precision (int n); int precision() ... cin >> ch; number = ch; // Read a character cout

Ngày tải lên: 06/07/2014, 17:21

... from cin and stores them in the string variable text until a new line character occurs However, you can specify a different delimiting character by passing the character to the getline() function ... using namespace std; int main() { char ch; string word; cin >> "Let's go! Press the return key: " >> ch; cout > setprecision(3) ... or: cin.width(16); cin >> label; cin.sync(); cin.clear(); // Clears the buffer and resets // any error flags that may be set cout > price; // Input...

Ngày tải lên: 06/07/2014, 17:21

... representing the character P Exercise The corrected program: // Corrections are commented // #include #include // Manipulator setw() #include // Class string using namespace ... namespace std; int main() { string word; // To read a word // char ch; is not needed // cout // Input newline character cout ... Demonstration of compound assignments #include #include using namespace std; int main() { float x, y; cout

Ngày tải lên: 06/07/2014, 17:21

... page calculates the average of a sequence of integers input via the keyboard Since the loops contains two statements, the statements must be placed in a block The controlling expression cin >> ... is common practice to place the loop body in a new line of the source code and to indent the statement to improve the readability of the program Example: int count = 0; while( count < 10) cout ... program // average.cpp // Computing the average of numbers #include using namespace std; int main() { int x, count = 0; float sum = 0.0; cout

Ngày tải lên: 06/07/2014, 17:21