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By Singh R., Sharma V., Varshney M.

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Programs must balance speed, size, and simplicity on systems ranging from microcontrollers to supercomputers. Programs may be written once and not change for generations, or they may undergo nearly constant modification. Finally, programmers may simply differ in their tastes: they may be accustomed to discussing problems and expressing them in a particular language. One common trend in the development of programming languages has been to add more ability to solve problems using a higher level of abstraction.

Object oriented programming language: The object oriented programming programs is as a collection of interacting objects that communicate via message passing. Each object can be thought of separate machine consisting of both data and operations on the data. In this language the data type is bound together with the initializations and other operations on the type. The type is referred to a class, local variable are called instance variable their initialization are accomplished by special methods called constructors and other operations are implemented by methods.

The passes themselves are only part of the compilation process, however. The process of creating an executable image from source code file can involve several stages other than compilation. , a linker), but it may be a human readable text file. A compiler is likely to perform many or all of the following operations: lexing, preprocessing, parsing, semantic analysis, code optimizations, and code generation. 1 What is the Challenge? Many variations: • • • • many programming languages (eg, FORTRAN, C++, Java) many programming paradigms (eg, object-oriented, functional, logic) many computer architectures (eg, MIPS, SPARC, Intel, alpha) many operating systems (eg, Linux, Solaris, Windows) Qualities of a compiler (in order of importance): 1.

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