arduino platform and c programming

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Sethostname:server]; [_xmppstream sethostport:5222]; Nserror *error = nil; if (![ _xmppstream connectwithtimeout:3.0 Error:error]) { NSLog (@ "%@", Error.userinfo); } return YES;} -(void) setupstream{ _xmppstream = [[Xmppstream alloc] init]; [_xmppstream adddelegate:self Delegatequeue:dispatch_get_main_queue ()]; }The following is a successful callback for the connection. The password is verified in the following steps:-(void) Xmppstreamdidconnect: (Xmppst

introduce the System.IO namespace in C #.2.File (files) directory (folder, directory)Both the file class and the directory class are static classes that can directly point out the corresponding method.FileInfo DirectoryInfo non-static class, you need to create the object before you use the03. Serialization and deserializationSerialization is the process of converting an object's state into a format that can be persisted or transmitted. Relative to serialization is deserialization, which transfo

often called a hash tableDepending on the key (key), you can find the corresponding value1.HashTable precautionsCollections of type 01.HashTable can only be traversed with a foreach loop because there is no indexElements in the 02.HashTable collection are unordered (the element content is not presented in the Order of add)The key in 03.HashTable cannot be duplicated04HashTabel no RemoveAt ()2. Traverse three scenarios for Hashtable:☆: The first way to traverse all keys is to get value by the va

, Zhandou, shenming); - } $ } $}View Code1=========== Test Class ===========2 usingSystem;3 usingSystem.Collections.Generic;4 usingSystem.Linq;5 usingSystem.Text;6 usingSystem.Threading.Tasks;7 usingj5.entity;8 9 namespaceJ5Ten { One class Program A { - Static voidMain (string[] args) - { theWS WS =NewWS (); -Ws. Jibie ="Intermediate";//level -Ws. Zhandou = -;//Combat Effectiveness - ws. Info (); + Console.WriteLine (); -WS ws1 =NewWS ("Intermediate", the,9999

}, fighting capacity {2}, level {3}", PW. Name, PW. Blood, PW. Power, PW. level);Powwow pw1=new powwow ("East Poison West Xu", 1000,2);Console.WriteLine ("The sorcerer's name {0}, health is {1}, fighting capacity {2}, level {3}", Pw1. Name,pw1. Blood,pw1. Power,pw1. level);Powwow pw2 = new Powwow ("Master Poison", 6000, 98, 1);Console.WriteLine ("The sorcerer's name {0}, health is {1}, fighting capacity {2}, level {3}", Pw2. Name, Pw2. Blood, Pw2. Power, Pw2. level);Console.ReadLine ();}}S2T40 i

= (apple) Fru;D:fruits fru=new Apple ();Fru. Convert (Apple);Analytical:A is used to determine that D does not have the syntax of convert12: The following C # code will appear error when running (BC) A:arraylist a1=new ArrayList ();A1. ADD (100);A1. ADD (100);B:hashtable ht=new Hashtable ();Ht. Add ("Zhang San", new Object ());Ht. Add ("Zhang San", new Object ());C:listString name=list[0];D:dictionaryforeach (Onject p in Dict. Values) {}Analytical:B, the Hashtable key cannot appear duplicates.C,

XmlNode objectInnerText: The value of the current nodeName: Names of the current nodesChildNodes: All child nodes of the current node3.treeView binding NodeTreeNode tn = new TreeNode (item);Tn. Tag = Schedule.items[item]. Movie;Treeview.Nodes.Add (TN);Viii. operation of files1. Read and Write filesWrite:FileStream fs=new FileStream (path,filemode.create);StreamWriter sw=new StreamWriter (FS);Sw. Writer (requires some text);Sw. Close (); Rear-open first-off flowFs. Close ();Read:FileStream fs=

own cleanup tcpthread*th=newtcpthread (); th->client=client;//get socket//start thread The first parameter is the address of the entry function (function pointer)//the object called by the second argument std::thread STH (tcpthread::main,th);//When the above call is finished object will be destroyed/destroyed not affected but this thread still has some resources not released// we can directly let him release the call , the main thread does not control the processing of sub-threads, such as

(sock_id,Ten)) the { -Perror ("Listen Socket failed\n"); WuExit0); - } About /**/ $ while(1) { - if(fp = fopen (argv[2],"W")) ==NULL) - { -Perror ("Open file failed\n"); AExit0); + } theLseek (FP,0, seek_end); -Clie_addr_len =sizeof(CLIE_ADDR); $ /**/ thelink_id = Accept (sock_id, (structSOCKADDR *) clie_addr, Clie_addr_len); the if(-1==link_id) { thePerror ("Accept Socket failed\n"); theExit0); - } in bzero (buf

This article supporting source code Disclaimer: This series of courses is designed for beginners to start the exercise, the purpose is to pass a complete questionnaire management system case to enable beginners to understand, deepen or become familiar with the project development process and in. NET platform for use on VS2005 and C # for Windows programming, and in the design of the course, I try to avoid

This article supporting source code Disclaimer: This series of courses is designed for beginners to start the exercise, the purpose is to pass a complete questionnaire management system case to let the novice understand, deepen or familiar with the project development process and in. NET platform to use VS2005 and C # for Windows programming, in the course design, I try to avoid or do not discuss the under

This article supporting source code Disclaimer: This series of courses is designed for beginners to start the exercise, the purpose is to use a complete survey management system of case development to enable beginners to understand, deepen or become familiar with the software project development process and in. NET platform to use VS2005 and C # for Windows programming, in the course design, I try to avoid

Practice of C Programming in Linux (1) -Development Platform Construction . GCC compiler GCC is the most important development tool in Linux. It is the gnu c and C ++ compilers. Its basic usage is as follows: Gcc [options] [filenames] Options is the compilation option. GCC provides more than 100 compilation options, but only a few are frequently used. We will only introduce several common options. Suppose

)Analytical:Method overloading means that the method name is the same, and the parameter type and the number of parameters are different, in the same class, constructors and ordinary methods can be overloaded 19: In C #, the following code runs as a result (a)public class Fruit{public virtual void Show (){Console.WriteLine ("Different flavors of fruit");}}public class Lemon:fruit{public override void Show (){Console.WriteLine ("Lemon is sour!") ");}}Class Program{static void Main (String[]

option, in the C option, the method is marked abstract method, the D option is the keyword to define the interface.A is wrong, base can only be written in front of the method body curly braces C is wrong, base no curly braces D is wrong, like ACThis paper examines how to use virtual and override to implement a method override, which overrides the virtual method of the parent class in the subclass, requiring that the same parameter be identical to the same name.The method overloads require diffe

PublicVehicle (stringXinghao,stringChandi) at { - This. Xinghao =Xinghao; - This. Chandi =Chandi; - } - /// - ///Vehiclrun () method in /// - Public voidVehiclerun () to { +Console.WriteLine ("the car is driving"); - } the } *}View Code1============= Test Class ==============2 usingsj1.entity;3 usingSystem;4 usingSystem.Collections.Generic;5 usingSystem.Linq;6 usingSystem.Text;7 usingSystem

to carry dessert! "); theConsole.WriteLine ("We finish our quest for dessert."); -Console.WriteLine ("Press any key to exit the------");Wuyi } the } -}View Code1============= Sweet category ==============2 usingSystem;3 usingSystem.Collections.Generic;4 usingSystem.Linq;5 usingSystem.Text;6 usingSystem.Threading.Tasks;7 8 namespacekehouzuye.entity9 {Ten Public classTianpin One { A Public stringTpname {Get;Set; } - - PublicTianpin (stringname) the

: Cook according to the menu* Chef: Remind the food to be finished* Waiter: Pass the dish (will be done to the customer)* Customer: DiningMenu classProperties: Which customer (client) the menu belongs toWhich table is the menu (ID)What the customer ordered (meallist)Customer CategoryMethod: Orderpublic void order (waitress Waitress,order order)MealEatWaiter classRecord Guest OrderGetOrder (Order order)Submit a menu to the chefSendorder (Chef chef)Chuan CaiTranscook ()Chef classGet MenuCook cooki

, subclasses of the current class, subclasses of subclasses (grandchildren Class).3. Transitive nature of inheritanceIf a Class B inherits from Class A, and Class C inherits Class B, then Class C can also access the non-private members of Class AInheritance of the single root (C # does not support multi-inheritance Java and multi-inheritance is not supported)In C #, a class can have only one parent class.4. polymorphic1. Different objects respond differently to the same operation, which is known