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C0语言的词法分析程序软件学院1291410044杨德生词法规则：C0语言程序是一组由”{”和”}”括起来的语句序列，语句只有赋值语句，输入语句和输出语句。变量均定义为整形变量，默认初始值为0，因此不需要变量的声明。表达式由整数，变量和运算组成。运算符有两种——加法运算符和乘法运算符。形式化此法运算符：形式化词法规则：实现DFA：StartstateS0EndstateS*FirstinS0{startinginS0}{ifnextcharacteris“{”}gotoS1{nowinS1}{ifnextcharacterisreadifnextcharacteris0...9ifnextcharacterisa...zifnextcharacterisA...Z}gotoS2{nowisS3}{ifnextcharacteriswriteifnextcharacteris0...9ifnextcharacterisa...zifnextcharacterisA...Z}(nowinS2){ifnextcharateris(}gotoS4{nowinS3}{ifnextcharacteris(}gotoS6{nowinS6orS4}ifnextcharacteris)gotoS7{nowinS7}{ifnextcharacteris=ifnextcharacteris;}gotoS7{nowinS7}ifnextcharacteris}gotoS*