【導(dǎo)讀】有一定的難度，但譯文能夠較好的表達(dá)出原文的思想。準(zhǔn)確，語句通順，文字?jǐn)?shù)量符合要求。不足之處在于個別語句的翻譯缺乏。潤色，有些牽強(qiáng)。總之，譯文符合要求，反映出學(xué)生具有較好的專業(yè)外文。閱讀和翻譯能力。當(dāng)ASP第一次發(fā)布時，Web編程還比較困難，因為需要IIS來處理ASP頁。和VisualStudio®2020通過引入網(wǎng)站開發(fā)模型使一切工作都變得容易了。此外，您還可以使用內(nèi)置的DevelopmentServer快速測。必須安裝IIS才能進(jìn)行開發(fā)這一先決條件。即使用VisualBasic寫的條件語句的語法和用C++的不一樣,程序的功能也是相同的。于多種語言來說維持這一功能需要很大的工作量。舉例來說，.NET類庫不僅包含處理數(shù)據(jù)庫訪問的類。幸運(yùn)地是，類不是簡。.NETframework的類被組織成有層次結(jié)構(gòu)的命名空間。這個命名空間包含基本的數(shù)據(jù)類型的所有的類,例如：字符串、數(shù)。組，還包含提供隨機(jī)數(shù)字和日期的類。，而文件指定特定的類。個錯誤在頁面中將是很難的。

　　

【正文】 learn. The curlybrace syntax of C will be instantly recognizable to anyone familiar with C, C++ or Java. Developers who know any of these languages are typically able to begin working productively in C within a very short time. C syntax simplifies many of the plexities of C++ while providing powerful features such as nullable value types, enumerations, delegates, anonymous methods and direct memory access, which are not found in Java. C also supports generic methods and types, which provide increased type safety and performance, and iterators, which enable implementers of collection classes to define custom iteration behaviors that are simple to use by client code. As an objectoriented language, C supports the concepts of encapsulation, inheritance and polymorphism. All variables and methods, including the Main method, the application39。s entry point, are encapsulated within class definitions. A class may inherit directly from one parent class, but it may implement any number of interfaces. Methods that override virtual methods in a parent class require the override keyword as a way to avoid accidental redefinition. In C, a struct is like a lightweight class。 it is a stackallocated type that can implement interfaces but does not support inheritance. In addition to these basic objectoriented principles, C facilitates the development of software ponents through several innovative language constructs, including: ? Encapsulated method signatures called delegates, which enable typesafe event notifications. ? Properties, which serve as accessors for private member variables. ? Attributes, which provide declarative metadata about types at run time. ? Inline XML documentation ments. If you need to interact with other Windows software such as COM objects or native Win32 DLLs, you can do this in C through a process called Interop. Interop enables C programs to do just about anything that a native C++ application can do. C even supports pointers and the concept of unsafe code for those cases in which direct memory access is absolutely critical. The C build process is simple pared to C and C++ and more flexible than in Java. There are no separate header files, and no requirement that methods and types be declared in a particular order. A C source file may define any number of classes, structs, interfaces, and events. C programs run on the .NET Framework, an integral ponent of Windows that includes a virtual execution system called the mon language runtime (CLR) and a unified set of class libraries. The CLR is Microsoft39。s mercial implementation of the mon language infrastructure (CLI), an international standard that is the basis for creating execution and development environments in which languages and libraries work together seamlessly. Source code written in C is piled into an intermediate language (IL) that conforms to the CLI specification. The IL code, along with resources such as bitmaps and strings, is stored on disk in an executable file called an assembly, typically with an extension of .exe or .dll. An assembly contains a manifest that provides information on the assembly39。s types, version, culture, and security requirements. When the C program is executed, the assembly is loaded into the CLR, which might take various actions based on the information in the manifest. Then, if the security requirements are met, the CLR performs just in time (JIT) pilation to convert the IL code into native machine instructions. The CLR also provides other services related to automatic garbage collection, exception handling, and resource management. Code that is executed by the CLR is sometimes referred to as managed code, in contrast to unmanaged code which is piled into native machine language that targets a specific system. The following diagram illustrates the piletime and run time relationships of C source code files, the base class libraries, assemblies, and the CLR. Language interoperability is a key feature of the .NET Framework. Because the IL code produced by the C piler conforms to the Common Type Specification (CTS), IL code generated from C can interact with code that was generated from the .NET versions of Visual Basic, Visual C++, Visual J, or any of more than 20 other CTSpliant languages. A single assembly may contain multiple modules written in different .NET languages, and the types can reference each other just as if they were written in the same language. In addition to the run time services, the .NET Framework also includes an extensive library of over 4000 classes organized into namespaces that provide a wide variety of useful functionality for everything from file input and output to string manipulation to XML parsing, to Windows Forms controls. The typical C application uses the .NET Framework class library extensively to handle mon plumbing chores.