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计算机系统讲座概述机器说明.pdf

发布:2025-03-31约2.75万字共14页下载文档
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Overview

Overview

•MachineinstructionsandHLL

Lecture3•Semanticgap

•Translation

•Linking

•Libraryfiles

•Interpreters

•Interpretersvs.Compilers

•Codesharingandreuse

•Dynamiclibrariesanddynamiclinking

2

MachineinstructionsandHLLSemanticgap

MachineinstructionsandHLLSemanticgap

•Inthepreviouslecturewehaveseen:

–HighLevelProgrammingLanguages(HLLs)

aremoresuitableforprogrammingthanthe

languagesofmachineinstructions.

–Examples:FORTRAN,COBOL,C,C++,Java,

Perl,…

–ProgramsinHLLstillhavetobetranslatedto

themachinecodes.(Youknowwhy,,,)

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