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1、PracticalProgramminginTclandTkBrentWelchDRAFT,January13,1995UpdatedforTcl7.4andTk4.0THISISNOTTHEPUBLISHEDTEXTTHEINDEXISINCOMPLETESOMESECTIONSAREMISSINGTHEMANUSCIRPTHASNOTBEENEDITEDGETTHEREALBOOK:ISBN0-13-182007-9AnenhancedversionofthistexthasbeenpublishedbyPrenticeHall:ISBN0-13-182007-9Sendc
2、ommentsviaemailtowelch@acm.orgwiththeword“book”inthesubject.http://www.sunlabs.com/~bwelch/book/index.htmlThebookisundercopyright.Printforpersonaluseonly.Thison-lineDRAFTisavailablecurtestythekindfolksatPH.TableofContents1.TclFundamentals.............................................1GettingS
3、tarted............................................................1TclCommands.............................................................2HelloWorld..................................................................3Variables..................................................................
4、....3CommandSubstitution................................................4MathExpressions........................................................4BackslashSubstitution................................................6DoubleQuotes.............................................................7Pro
5、cedures...................................................................7AWhileLoopExample..................................................8GroupingAndCommandSubstitution.......................10MoreAboutVariableSubstitution..............................11SubstitutionAndGroupingSummary...
6、.....................11FinePoints.................................................................12Comments.................................................................13CommandLineArguments.........................................13Reference.............................................
7、......................14BackslashSequences...........................................14ArithmeticOperators...........................................14Built-inMathFunctions......................................15CoreTclCommands.....................
