Compiler Essay -- Computer Science Technology Essays

CompilerCompiler, in computer science, computer plan that translates source engrave, operating instructions in a program written by a software engineer, into object decree, those same instructions written in a language the computers primal processing unit (CPU) can read and interpret. Software engineers write source code using high level programming languages that people can understand. Computers cannot instanter execute source code, but need a compiler to translate these instructions into a low level language called machine code. Compiler How It plantCompilers collect and reorganize (compile) all the instructions in a given set of source code to produce object code. Object code is frequently the same as or similar to a computers machine code. If the object code is the same as the machine language, the computer can run the program immediately after the compiler produces its translation. If the object code is not in machine language, other programs much(prenominal) as assembler s, binders, linkers, and loadersfinish the translation. Most programming languagessuch as C, C++, and Fortranuse compilers, but somesuch as BASIC and LISPuse interpreters. An interpreter analyzes and executes each line of source code one-by-one. Interpreters produce initial results faster than compilers, but the source code must be re-interpreted with every use and interpreted languages are usually not as sophisticated as compiled languages. Most computer languages use diverse versions of compilers for different types of computers or operating systems so one language may have different compilers for personal computers (PC) and Apple Macintosh computers. Many different manufacturers often produce versions of the same programming language, so compilers for a language may vary in the midst of manufacturers. Consumer software programs are compiled and translated into machine language before they are sold. Some manufacturers provide source code, but usually only programmers find the so urce code useful. Thus programs bought off the shelf can be executed, but usually their source code cannot be read or modified.When executing (running), the compiler outset parses (or analyzes) all of the language statements syntactically one after the other and then, in one or more successive stages or passes, builds the output code, making for certain that statements that refer to other statements are referred ... ... sequence comparison methods. GAMS -- a high-level modeling system for mathematical programming problems. DISGCL -- an interpreter language based on plotting library DISLIN. Glish (within AIPS++ system) -- a language/environment for data acquisition/analysis. Isaac -- scientific calculator and programming language. MAX -- Xbase compiler with integrated database engine. MetaCard -- a multimedia authoring appliance and GUI development environment. MSDL -- a scene description language for graphics research. Nickle -- a desk calculator language with powerful programmi ng and scripting capabilities. PerlDL -- turn perl into an array-oriented, numerical language. ProvideX -- an object-oriented, air basic development environment. RLaB -- matrix oriented, interactive programming environment. S-Lang -- an interpreted language could be embedded into an extensible application. Soar -- a cognitive architectural example and mode ls, and an AI programming language. ZPL -- a portable, high performance parallel programming language for computations. Referenceswww.programmersheaven.comwww.compiler.netwww.msn.encarta.comwww.webopedia.com