terminology(編輯修改稿)
2025-08-13 17:25 本頁面
【文章內(nèi)容簡介】 me fixedlength code, such as an integer, rather than as a variablelength character string (see Figure ) 187。 Token type, Token specifier (value) (see Figure ) 11 Scanner Output ? Token specifier 187。 identifier name, integer value ? Token coding scheme 187。 Figure 12 Example Figure Statement Token type Token specifierPROGRAM STATS 122 ^STATSVAR 2SUM,SUMSQ,I, ? : INTEGER 22 ^SUM1422 ^SUMSQ14?.1422 ^VARIANCE136BEGIN 3SUM:=0。 22 ^SUM1523 013 Token Recognizer ? By grammar 187。 ident ::= letter | ident letter| identdigit 187。 letter ::= A | B | C | D | … | Z 187。 digit ::= 0 | 1 | 2 | 3 | … | 9 ? By scanner modeling as finite automata 187。 Figure (a) 14 Recognizing Identifier ? Identifiers allowing underscore (_) 187。 Figure (b) State AZ 09 _1 22 2 2 33 2 21 2AZ 2AZ093AZ0915 Recognizing Integer ? Allowing leading zeroes 187。 Figure (c) ? Disal
環(huán)評公示相關(guān)推薦
鄂ICP備17016276號-1