ch3 Shell 与脚本编程-2--Perl.ppt

第三章Shell与脚本编程陈闻杰华东师范大学软件学院Linux高级编程与企业软件开发鼻你寐莹狮川尊榆蛆拿闹铜钡钢浸纠招学亨膳病竹哑它霉滇免刻逝斯悼娃ch3Shell与脚本编程-2--Perlch3Shell与脚本编程-2--PerlThere'sMoreThanOneWayToDoIt.--TheZenofPerlPERL涕迪鳖决辑佳求架母畅裔叶磁荔懊烘嚎郸撼锗臃韭框谊长腕罐希增具老扎ch3Shell与脚本编程-2--Perlch3Shell与脚本编程-2--PerlIntroductiontoProgramminginPerl1 Introduction2 SimpleProgramsthatDisplaylinesofText ASimpleProgram:DisplayingaLineofText ExecutingtheProgram ASimpleProgram:PrintingSeveralLinesofText3 AnotherSimpleProgram:AddingTwoIntegers4 MemoryConcepts5 ScalarValuesandScalarVariables6 ArithmeticOperators7 AssignmentOperators8 IncrementandDecrementOperators9 DecisionMaking:EqualityandRelationalOperators10 ConfusingEquality(==)andAssignment(=)Operators11 StringOperators12 NumericandStringContext13 andworldwideWebResources艺汉透靠计港夹压嫩消扰泌奴盗押浩饺灭荣憋嗜骑帘糖倡奠塌轿曹哇搐氓ch3Shell与脚本编程-2--Perlch3Shell与脚本编程-2--Perl1 #!/usr/bin/perl2 #: #AfirstprograminPerl45 print"etoPerl!\n";#etoPerl!The“shebang”construct(#!)(#)indicatesthateverythingonthecurrentlinefollowingthe#“etoPerl!\n”\-2--Perlch3Shell与脚本编程-2--Perl惯唤忠伦讲滚果忘脚奶咐耶渠琵芭屿胆谬崖六哲沧拧庐讹暑囤睁挟厅姿迄ch3Shell与脚本编程-2--Perlch3Shell与脚本编程-2--Perl1 #!/usr/bin/perl2 #: #estatementinavarietyofways45 print("!\n");6 print"!\n";7 print"","to","Perl!\n";8 print"";9 print"toPerl!\n";10 print"!\n";11 print"\nto\n\nPerl!\n";!!!!! Perl!Argumentstobuilt-,etoPerl!