【正文】 In order to plete a particular job, we need to access and use the technology effectively. This kind of thinking can be applied to many types of work, such as : cooking, pyrotechnic, software development and other work. If the work Township respective fields is not of sound, then the practitioners in the field will be to find some mon, effective solutions, using these programs, not in the circumstances to resolve the relevant issues, plete the work so as to achieve the purpose. Certain areas of regular employees in the field will have a habit of terminology These habits contribute to the terms of the work related personnel exchanges. Some models customary terms. The socalled model is able to plete some specific task and reach the goal of the mission offtheshelf technology. With a habit of technology and related terms, some of this technology and modes documented, These records document from the customary terms to be standardized and made some effective technology has been widely disseminated. Christopher Alexander is that some of the best skills facts old road program modeled on the one of the pioneers. His research area is the architecture, not the software. In his new book, A Pattern Language : Towns, Buildings, Construction book, Alexander the construction of housing and urban building the successful model. Alexander39。s needs. To discuss some language C unable to plete the work, we should understand how the C language is the work performed, Therefore, we first discuss the C language interface. If you do not use interface, then you can use the abstract class (C + + language abstract). However, the n layer (ntier) software development and definition of structure and other objects, the interface has a critical role to play. Similarly, if you do not use missioned, then you can use the interface. If a public mandate required to be registered for a callback method, then the mission could improve these mandates, and therefore C Entrusted language is a very useful content. 1． Interface and abstract category Please indicate the C language and abstract category of the three interfaces between different. In use, failed to provide a method of nonabstract category with an abstract interface is similar. However, we need to pay attention to the following points : A class can achieve any number of interfaces, but only up to an abstract category of subcategories. An abstract class can include abstract, and an interface all methods in effect are abstract. An abstract class can declare and use variables, and not an interface. An abstract category of the visit Xiuchifu can be public, internal, protected, protected internal or private, and members of the interface visit Xiuchifu in default under are public, but, 華北科技學(xué)院畢業(yè)設(shè)計 (論文 ) 3 in a statement Interface members, allowed to use the visit Xiuchifu (even allowed to use public visit Xiuchifu). An abstract class can be defined Constructors, and not an interface. 2． Interface with the missioning Interface with the missioning of parison : Interface with the missioning of the similarities is that they can have the desired definition of the function. We learn in the process of missioning often create some confusion and the reason was partly due to trust the word It can express meaning is nuanced different concepts. The right to mission and pare interface, we have to take a look at the C language mission is how to work. C language keyword delegate introduction of a new type of mission, This new type missioned determine what type of method can be used only example of this type of mission. Commissioned no standard type of name, but it standardized the method parameter types and return types. We consider the following statement : Public delegate object BorrowReader ( IDataReader reader)。 } The above code interface is Oozinoz system Showproperties part of the library. In simple terms, this meant to standardize the interface of two C attributes, but strictly speaking, they are not C attributes. The use of C syntax for C attributes the advantage of its syntax more elegant. However, the most important point is not to have the capacity to foresee the reflection customers can detect the presence of C attributes. For example, as long as the relevant attribute is the real target of C attributes, a Datagrid object can be in one ArrayList pools showing relevant object attributes. In an interface, C attributes expressed in the syntax is dependent, and therefore in achieving interface will have some differences. We should use indepth understanding of C interface characteristics of the relevant concepts and the use of details. 4． Inter