文件名称：Structured Programming with go to Statements
文件大小：2.88MB
文件格式：PDF
更新时间：2011-10-19 09:48:44
go to Structured Programming
By knuth A consideration of several different examples sheds new light on the problem of ereating reliable, well-structured programs that behave efficiently. This study focuses largely on two issues: (a) improved syntax for iterations and error exits, making it possible to write a larger class of programs clearly and efficiently without go to statements; (b) a methodology of program design, beginning with readable and correct, but possibly inefficient programs that are systematically transformed if necessary into efficient and correct, but possibly less readable code. The discussion brings out opposing points of view about whether or not go to statements should be abolished; some merit is found on both sides of this question. Fina!ly, an attempt is made to define the true nature of structured programming, and to recommend fruitful directions for further study. Keywords and phrases: structured programming, go to statements, language design, event indicators, recursion, Boolean variables, iteration, optimization of programs, program transformations, program manipulation systems searching, Quieksort, efficiency