Practical Programming in Tcl and Tk.pdf

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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.....................