Class

Baike card

class of Chinese characters, pronunciation is lèi, a type, similar to the other meaning, but also as a surname.

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meaning more literal interpretation of the basic information on changes in dialect speech sinks Kangxi classical mathematical logic in ancient China in the class name class name of the origin of the First, under the East Mongolia's genealogy class > meaning of the basic information class # lèi phonetic: someone now ㄟ radical: m, the Ministry of Foreign stroke: 3, Total stroke: 10 strokes number: 431 234 134 square Number: 90804 UniCode: CJK Unified Ideographs U +7 C7B five-stroke 86 & 98: ODU Cangjie: FDK Zheng code: UFGD Interpretation ① species; many of the same or similar things, comprehensive: Type | Category | Category | categorized. Things with common features of the formation of species. Listen: There are many types of trees, poplar, willow,[url=http://www.moncleruksales.co.uk/][b]title=Moncler Outlet[/b][/url], pine, cypress, etc. Note: The form can also be used to speak. For example: good or bad your class! ! ! ② similar; similar: similar | Similar] [lèisì caused similar. Listen: these kinds of questions similar to the math problem, solution is much the same. | Apes | imitation like a dog. ③ surname. ◎ detailed meaning of words like class lèi (1) shape the sound. From the dog, (lèi) sound. From the Original meaning: Category (2) with the original meaning of the [kind; class; type; category] class, similar species, but the dog is the worst. - - - - - - - - Song Shen Kuo, Persimmon pear chestnut date of class. - Sima Guang Song, two is used to determine good and bad, - - Weaknesses, problems [fault] the people's health is, the provision is stupid, closed the class. - - - - Said: - - Qing Yuan Mei, Chu language class sound. - Ming Wei Xi - Ming Wei study - Partial, uneven [bias] husband who is rich class, proud of; husband of the poor and lowly who are seeking soft; touched the non-jen also. - - San Guowei Pi - Sima Guang Song, : 3 Note carefully the word category page. (Class) Qin said the selfless class facilities. And And Inferior also. And And And resemblance also. Class, still, as also. Executive leather silk, as princes of the ceremony see also. And festival name. And That the line who were under the first category on the left low-built house. And Since the Hin Mu, food are not jealous. And 𦝭 with the same. And country name. And last name. And Side also. And Also appears. Leaves Zhu Rong, Yao Xi-day day. Sound from the dog. (Class) classical class (-shaped sound from the dog,? With the original meaning of class, similar species, but the worst dog. give the class. also. · trap I - Yuan Mei, tiger - a dog. carved swan ~ duck. ⒊ probably, roughly: ~ more predicament of Chinese ancient logic logic in ancient China, the class is about one of the basic concepts of the principles of reasoning. the same logic in mathematics, including all classes and an empty class. mathematics classes in set theory and other mathematical applications, the class is a collection of (sometimes it can be other mathematical objects) to collect, can be shared by all members of the nature of were no differences defined and some classes are set (such as all the even integers of the form class), but some are not (such as the order number of the form class or all collections posed by class) A is not a collection of classes is called the true class in mathematics, there is too many objects for collections, but must be described in class, such as the scope and the super-large class of real body and the like, etc. To prove that a given a true class, the general procedure is to prove that this meet the set theory ZF axioms; thus avoiding a lot of simple set theory out of the paradox. In fact, these paradoxes have become a class that is true of a class of methods, for example, Russell's paradox can prove that all does not contain a collection of their own class is composed of a collection of true class, and Bula Li - Fuer Di paradox can be posed to prove that the order number of the class is a real class. the standard axioms of set theory ZF is not addressed to the class; class exists only in the meta-language and logic formulas into equivalence classes of von Neumann - Bonei Si - Gödel set theory is to take a different approach; class in this theory is the basis of the object, and set is defined as a class may be some other elements of the class. really like, was not of any other class of elements of classes in set theory, such as a new foundation or other semi-set theory, the still makes sense (not a bunch of things will be any collection), but the confrontation is not based on the identification of combined characteristics of its size, for example, all contain the pan will have a collection of set theory is really a collection of sub-class of class. class which to build their own last name 14 people. Xiling Yellow Emperor married the daughter of the country, is for Yang, Qingyang been called princes, down home river (now Qufu, Shandong Province). yi, another is called, also has been called princes, down home in the Flow <> set: Qingyang married Shi Zhinv in class, after class's, showing that class origins in the Yellow Emperor's son, when a matriarchal society, so far, more than five thousand (532,318.1708) The second is based on the Most are located in Shandong's family Xintai, Mengyin area, but not within the specified spectral class's family moved to where The design language is the concept of class in object-oriented programming language, a concept of a class defines a set of object class has the behavior (be-havoir), which describes an object can do and what methods do (method), they can operate on this object the procedures and processes. programming in a simple class meaning

The class diagram

Class (Class) is actually a type of object variables and methods defined in the prototype and it said that in real life with a common characteristic of a class of abstract things, is the basis for object-oriented programming . class is the definition of an object it contains information about the way the object moves, including its name, methods, properties and events. in fact it is not the object itself, because it does not exist in memory when the reference class code is run, a new instance of the class, that object is created in the memory, although only one class, but class in memory from the same type of object to create multiple can be the class as a However, each object as a separate entity, like the action, for example, an object's properties can be set with the same type of other objects of different values ​​of the general form of class definition class Name {public: class's public interface

MFC class diagram

private: private member functions private data members}; class is defined by the class header and the class body of two parts. by the keyword Class begins the first class, then the class name, the naming rules and general rules for naming identifiers consistent class body, including all the details, and put a pair of curly brackets. class definition is a statement, so there must be a semicolon at the end, or will cause a compilation error. members of the class definition of class body It supports two types of members: (1) data members, which specify the internal representation of such objects (2) member function, they specify the type of operation. class members have access to three different: ( 1) public (public) members can access outside the class (2) private (private) members of the class member functions can only be accessed (3) protection (protected) member function can only be a member of the class or derived class The member function access data members are usually private, member functions are usually part of the public, part private. public function can be accessed outside the class, also called the class interface for all data members and member function to specify the appropriate access privileges. Microsoft Visual Basic for Applications (VBA) projects can contain two different types of class module: there is no any kind of user interface associated with the basic class module; form or other components associated with The class module, for example, is associated with the form's class module, they are basically the same class module, but they only exist in that form in the memory only when present in memory. have associated object class module example is the A {... ...} defined in C # class (class) and struct in C + +, C # language, class and struct can define a class, their differences are as follows. class is a reference type, inherited from the System.Object class; struct is value types, inherit from System.ValueType class, so do not polymorphic, but note that, System.ValueType is a reference type from the function point of view, class performance behavior; A struct used to store data. class supports inheritance, can be inherited Since the classes and interfaces; and no inheritance struct, struct can not inherit from a class, can not serve as the base class type, but the struct support interface inheritance (remember, discussed) class can be declared no-arg constructor, destructor can be declared; A struct can declare constructors with parameters, and can not declare a destructor,[url=http://www.uggbootsclearanceuks.co.uk/][b]title=UGG Clearance[/b][/url], so, struct no custom default no-arg constructor, the default no-argument constructor simply initializes all the values ​​0 and so their value is instantiated, class to use the new keyword; A struct can not use the new keyword, if they are not new to instantiate the struct, then all of its field will be in unallocated until all fields initialized, or reference to a field assignment will not cause a compilation error. class can implement an abstract class (abstract), a function can be declared abstract; A struct for the abstract, it can not declares an abstract function. class members can be declared protected, virtual members, sealed member and override members; A struct can not, but it is worth noting that, struct can override the virtual methods of System.Object 3, Equals (), ToString () and GetHashTable (). class of the object copied into shallow copy and deep copy (the topic later in this series will highlight the theme of this paper, no details), must be special methods to complete the copy; the struct created object replication is simple, can be connected directly to the equal sign. class instance by the garbage collection mechanism to ensure the memory of recycling; A struct variable using the automatic discharge immediately after the memory allocation is passed as a parameter, class variables are Anzhi way transfer; A struct variable is passed by value means we can simply understand, class is a machine that can move, there are acts, more states have inheritance; A struct is a tote, a combination of different parts of the structure In fact, class and struct the most essential difference is that class is a reference type, memory allocation on the managed heap; A struct is a value type,[url=http://www.moncler-online.us][b]title=moncler jackets[/b][/url], memory allocation in the thread's stack. this difference has led to all these different points, so Only a deep understanding of content related to memory allocation in order to better manage this series after a further context, the reference types and value types to do with in-depth comparison and discussion, stay tuned, of course, as described in this article as the title , using the basic class struct can replace any occasion, class come from behind, although in some respects struct a performance advantage, but in the object-oriented programming, the basic is a class-ridden world. So, it was inevitably raised, since the class struct almost completely replace all the functions to achieve, then the struct there is still a need? The answer is, at least in the following circumstances, in view of performance considerations, we should consider using struct instead of class: 1. to achieve a major use in the structure of stored data, can be considered struct. 2. struct variable holds the stack space, so only a relatively small amount of data for the occasion. 3. struct array with higher efficiency. CSS style class in the css styles a defined period at the beginning of the English style as css class selectors in the page element to reference by class, such as:. test {color: # 00000; font-size: 12px;} referenced in the html element as: