【正文】 PROLOG language is a language for writing artificial intelligence the 20th century, 7039。s class can also be further bined into layers, and in the layer object of a class inherit another languages provided in this structure, so that objectoriented programming language for plex tasks very useful. Logic languages will be used as its mathematical basis for logic program consists of a series of facts and if ... then ... rules of position, to specify how the set of facts can be inferred from other facts, such as: Statement is true if X, then Y statement is false. In such a program execution process, an input statement can follow the logic of the other statements from the program AI programs using this language. Language Structure And Composition Programming language to use specific types of statements or instructions, to provide functionality to the program statement is an expression of the basic meaning of a simple sentence, its purpose is to give the puter a basic on the allowed data types, data, how to deal with, as well as work procedures and functions to use programming language statements to manipulate the mon elements, such as variables, and macros (small programs in the process). The data declaration statement given to the procedure known as a variable element to the name and in the program can be assigned a different can be called with the attribute types, which include: a variable may be stored in what kind of value, the value of the use of the extent of numerical precision, as well as how a variable can be structured way as in the table or arrayin the form of on behalf of a group of relatively simple values, etc..In many programming languages, a key data type is instruction to the variable itself has no value。s individual characters, then also used in assembly language. The Classification Of Highlevel Language Highlevel language is usually divided into processoriented, functional, objectoriented or logic of 39。 (3) the results of this simple operation of what is stored in main memory location。 in other words, they used the same operating system as the IBM PC. There are different operating systems available for PCs, but the most mon is Windows, which was developed by a pany named Microsoft. Windows is similar to the Macintosh operating system, because it also uses a mouse and a GUI (Graphical User Interface) that uses graphics or pictures to help the user navigate within the puter system. The Computer Revolution The introduction of the Macintosh OS and the later introduction of Windows played a large part in making puters accessible to so many people. The userfriendly interfaces of both operating systems made it easier for people with no puter training to learn to use these amazing machines. Other machines, such as typewriters and payroll calculators quickly became a thing of the past, as puters became so easy to use and so affordable. Programming Language In puter science, programming language that can be used to write the puter is running a series of instructions (puter program) the artificial English is similar to other natural language, programming language with vocabulary, grammar and , natural language not suitable for puter programming, because they can cause ambiguity, that is their vocabulary and grammar structure can be interpreted in several to calculate the programming language must have a simple logical structure, and their grammar, spelling and punctuation rules must be precise. Programming language and general degree of plexity quite of the programming language in order to address certain types of putational problems or to use a specific type of puter systems example, FORTRAN, and COBOL and other programming language to solve mon programming problems of some type of written FORTRAN for scientific field of applications, and COBOL for business these language aimed at addressing the specific types of puter problems, but they are highly portable, meaning that they can be used for many types of puter languages, such as machine language, is a particular type of puter system, or even a specific puter, in certain fields of study, prepared for most monly used programming languages are highly portable, can be used to effectively address the different types of putational as C, PASCAL, and BASIC language such as belong to this category. Language Type Programming language can be divided into lowlevel language and highlevel programming language or machine language, is the most basic programming language type, which can be a direct understanding of the difference between machine language depending on the manufacturer and model of your language is before the puter can understand and deal must first be translated into machine language programming , C + +, PASCAL, and FORTRAN are examples of highlevel language is a midlevel language, very close to machine language, there is no other highlevel language shown by the language of plexity, but still have to be translated into machine language. 1. Machine Language In the machine language, the directive was written in a puter can directly understand is called bitsequence of 1 and a machine language instruction is usually to tell the puter four things: (1) to the puter main memory (random access memory) in which location to find one or two numbers, or simple data segment。t understand programming languages. In other words, operating systems make puters user friendly. Types of Operating Systems Different puter manufacturers use different operating systems. Apple has specific operating systems for its line of Macintosh puters. When IBM released their Personal Computer or PC back in the early 198039。 in a variety of storage media presentation documents, such as a floppy disk, hard disk,