programming in c array of pointers

... the new sockets The server gets a socket for an incoming client connection by calling accept () int accept(int socket, struct sockaddr *clientAddress, unsigned int *addressLength) accept() dequeues ... new socket using send() and r ecv ( ) 9 Close the client connection using c l o s e ( ) Creating the socket, sending, receiving, and closing are the same as in the client The differences in the ... s t r u c t sockaddr_in) When connect () returns successfully, the socket is connected and c o m m u n i c a t i o n can proceed with calls to send() and recv() int send(int socket, c o n s t

Ngày tải lên: 05/11/2012, 14:45

... = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); Trang 24Accepting Connections#include <sys/types.h> #include <sys/socket.h> int connfd; struct sockaddr_in cliaddr; ... maximum number of connections the socket will queue up, each waiting to be accept()’ed Trang 14Connecting to a Server#include <sys/types.h> #include <sys/socket.h> if (connect(fd, addr, ... structure to the address struct in6_addr { uint8_t s6_addr[16];}; struct sockaddr_in6 { uint8_t sin6_len; sa_family_t sin6_family; in_port_t sin6_port; uint32_t sin6_flowinfo; struct in6_addr

Ngày tải lên: 05/09/2013, 09:57

... An array of conductors underneath the screen surface detects the change in capacitance caused by the presence of a finger on the surface The touch screen hardware then works out where on the screen ... were creating an application to look after bank accounts we could create a class to hold account information: public class Account { private decimal balance ; private string name ; public string ... you install the framework you get a command line compiler which can take C# source files and convert them into executable ones using console commands such as: csc MyProg.cs This command will compile

Ngày tải lên: 17/03/2014, 13:20

... error checking for these calls: bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)); listen(sockfd, BACKLOG); Trang 19sin_size = sizeof(struct sockaddr_in);new_fd = accept(sockfd, ... error checking properly Actually, there’s a cleaner interface you can use instead of inet_addr(): it’s called inet_aton() (“aton” means “ascii to network”): #include <sys/socket.h> #include ... end of a connected streamsocket The synopsis: #include <sys/socket.h> int getpeername(int sockfd, struct sockaddr *addr, int *addrlen); sockfd is the descriptor of the connected stream socket,

Ngày tải lên: 19/03/2014, 13:41

... make the contact that detects the input point A capacitive touch screen works in a different way An array of conductors underneath the screen surface detects the change in capacitance caused by ... (which is independent of any particular computer hardware) into machine code instructions that the computer processor can actually execute This compilation process is called Just In Time compilation ... were creating an application to look after bank accounts we could create a class to hold account information: public class Account{ private decimal balance ; private string name ; public string

Ngày tải lên: 23/03/2014, 22:21

... an instance fi eld exists once per instance Class methods can access information in class fi elds only, whereas instance methods can access information in the instance fi elds of their own instance ... in the much newer language Haskell: calcLine :: Int - > Int - > Int - > Int - > String calcLine ch col line maxp = let tch = if maxp - line == col then [chr ch] else “.” in if col ... (if (= col maxp) tch (append (append tch (calcLine ch (+ col 1) line maxp)) tch)) ) ) (defun calcLines (line maxp) (let* ((ch (+ line (char-int #\A))) (l (append (calcLine ch 0 line maxp)

Ngày tải lên: 28/04/2014, 16:01

... (int)v_float: -1 Exercise 4 // -// sinCurve.cpp // Outputs a sine curve // -#include <iostream> #include <cmath> // Prototypes of sin() using namespace std; #define CLS (cout ... various methods of string manipulation.These include inserting and erasing, searching and replacing, comparing, and concatenating strings. Trang 6154 C H A P T E R 9 T H E S T A N D A R D C L A S S ... erasing, searching, and replacing are available 䊐 Initializing Strings A string, that is, an object belonging to the string class, can be initialized when you define it using ■ a predefined string

Ngày tải lên: 06/07/2014, 17:21

... exists for each operation, such as inserting, erasing, searching, and replacing These methods generally allow passing a string constant instead of a second string A sin-gle character can also be ... string4.cpp // The program counts words and white space characters. // (A word is the maximum sequence of characters // containing no white space characters.) // -#include <iostream> #include ... checks You can also use the at()method to access a single character In contrast to the subscript operator, the at()method performs range checking If an invalid index is found an exception occurs

Ngày tải lên: 06/07/2014, 17:21

... of inheritance to create specialized classes without needing to change any existing classes When implementing a class you must define the capacities of those objects, that is, the member functions, ... 169Exercise 2 // -// palindrome.cpp: Reads and compares lines of text // -#include <iostream> #include <string> using namespace std; string header = " * * * Testing palindromes ... global functions Chapter 13, Defining Classes, describes the steps for defining member functions 䊐 Definition Functions can be defined in any order, however, the first function is normally main This

Ngày tải lên: 06/07/2014, 17:21

... nd Call func(); void func() func(); { } // 1st Call // 2nd Call func(); inline void func() func(); { } Copy The executable file only contains one instance of the function’s machine code ✓ HINT ... The machine code of the function is stored in the executable file wherever the function is called ✓ HINT ■ INLINE FUNCTIONS Call to a function not defined as inline Call to an inline function ... inline functions should contain no more than one or two instructions If an inline function contains too many instructions, the compiler may ignore the inlinekeyword and issue a warning Aninlinefunction

Ngày tải lên: 06/07/2014, 17:21

... scopeblock scope program scope Function Module 1 Module 2 file scope block scope Function block scope Function ■ STORAGE CLASSES OF OBJECTS 䊐 Availability of Objects C++ program 䊐 Storage Class Specifiers ... "And once more with characters!"<< endl; cout << "Enter two characters:" << endl; char c1, c2; if( cin >> c1 && cin >> c2) { cout << ... char,int, or long? b Now overload Max()by adding a further inlinefunctionMax(char x, char y) for arguments of type char. Can the function Max()still be called with two arguments of type int? Exercise

Ngày tải lên: 06/07/2014, 17:21

... line << endl; // Output the line } return 0; } // Cutline2.cpp // Containing the function cutline(), which removes // tabulator characters at the end of the string line // The string line ... namespace std; void cutline( void ); // Prototype string line; // Global string int main() { while( getline(cin, line)) // As long as a line { // can be read cutline(); // Shorten the line cout ... end of the string is // reached or when a character that cannot be converted is // reached // -#include <string> // Type string #include <cctype> // isspace() and isdigit() using

Ngày tải lên: 06/07/2014, 17:21

... usingdirectives can occur at any part of the program Ausingdeclaration makes an identifier from a namespace visible in the current scope Example: using myLib::calculate; // Declaration You can ... namespace is also imported If identical identifiers occur in the current namespace and an imported namespace, theusingdirective does not automatically result in a conflict However, referencing an ... E C L A S S E S A N D N A M E S P A C E S // scope.cpp // Accessing objects with equal names // -#include <iostream> #include <iomanip> using namespace std; int var = 0; namespace

Ngày tải lên: 06/07/2014, 17:21

... while( cin.get() != '\n') ; } inline char getYesOrNo() // Read character Y or N { char c = 0; cin.sync(); cin.clear(); // Just new input do { cin.get(c); c = toupper(c); // Permitting lower case ... Menu cin.get(choice); choice = toupper(choice); cls(); cout << header << endl; // Header switch( choice) { case 'B': // Booking if( !getPassword() ) { cout << "Access denied!" ... // Inline functions: inline void cls() { cout << "\033[2J"; } inline void go_on() { cout << "\n\nGo on with return! "; cin.sync(); cin.clear(); // Only new input

Ngày tải lên: 06/07/2014, 17:21

... -// circle.cpp // Defines and calls the function circle() // -#include <iostream> #include <iomanip> #include <string> using namespace std; // Prototype of circle(): void circle( ... value occurs, i.e., the function manipulates a local copy Thus, only a local copy of the string is changed in the function, but the string in the calling function remains unchanged Exercise 2 ... as 0 in standard header files A pointer containing the value NULL is also called NULL pointer Trang 5䊐 Using Pointers to Access ObjectsThe indirection operator *is used to access an object referenced

Ngày tải lên: 06/07/2014, 17:21

... public: // Public data members and methods here }; // account.h // Defining the class Account // -#ifndef _ACCOUNT_ // Avoid multiple inclusions #define _ACCOUNT_ #include <iostream> #include ... so-called public interface of the class. The opposite page shows a schematic definition of a class The privatesection gen-erally contains data members and the publicsection contains the access ... blocks of classes In C++, a class is a user-defined type It contains data members, which describe the properties of the class, and member functions, or methods, which describe the capacities of

Ngày tải lên: 06/07/2014, 17:21

... several source files In this case, you will need to place the class definition in a header file If you place the definition of the class Accountin the fileAccount.h, any source file including the ... source code of the application program, for example, the code containing the functionmain, is independent of the class and can be stored in separate source files Sep-arating classes from application ... 3Defining a class also defines a new type for which variables, that is, objects, can bedefined An object is also referred to as an instance of a class. 䊐 Defining Objects An object is defined in

Ngày tải lên: 06/07/2014, 17:21

... valid combination of the four access modifiers. e) Constructors are not inherited c) The identifier of a constructor- declarator must not name the class in which the constructor is declared. ... when the object is accessed. c) A static constructor can have public as a accessibility modifiers 74. class A { public static int X = B.Y + 1; } class B { public static int Y = A.X ... explicitly or implicitly. b) Static constructors can have accessibility modifiers. e) Static constructors are called when the class is loaded. c) Static constructors cannot be called...

Ngày tải lên: 21/08/2012, 15:55

... static constructor for a class is called automatically when the object is accessed. c) A static constructor can have public as a accessibility modifiers 74. class A { public static int X ... other constructors than those that are actually declared in the class b) A constructor-declaration may include a valid combination of the four access modifiers. e) Constructors are not inherited ... value c) get b) set d) find 100. public class A:B ,C, D{ } The above code represents ______ [0.5] a) multilevel interface c) multiple interface b) hierarchical interface d) multiple inheritance 101....

Ngày tải lên: 09/04/2013, 09:10

... Information http://www.fz-juelich.de/zam/cxx/ ➠ Parallel Programming with C+ + ➠ Forschungszentrum Jülich Local C+ + Information ❑ Official C+ + On-line FAQ http://www.cerfnet.com/~mpcline /C+ +-FAQs-Lite/ Programming in C+ + ... Fortran Boolean (int) boolean logical Character char, wchar_t char character(n) Integer short int integer integer int long int FloatingPoint float real real double Complex ❖ (in C9 9) ❖ complex ❑ Size of data ... function definitions included in class definitions are automatically inline! ❑ re and im: declared by and belong to calling object (c1 above) ❑ Note: constructor not called for cp! ➠ How about constructors...

Ngày tải lên: 13/12/2013, 08:15