编译原理课程设计包括词法分析器（nfa转dfa）和语法分析器（LR1实现）.zip资源-CSDN下载

共18个文件

txt：7个

cpp：5个

o：2个

86 浏览量 2024-04-17 12:15:16 上传评论收藏 788KB ZIP 举报

编译原理是计算机科学中的一个核心领域，主要研究如何将高级编程语言转化为机器可以理解的指令。本课程设计涵盖了编译器的两个关键组件：词法分析器和语法分析器，具体涉及NFA到DFA的转换以及LR1解析器的实现。 1. **词法分析**： - **正则表达式与非确定有限自动机（NFA）**：词法分析器通常基于正则表达式来识别源代码中的词汇元素，如关键字、标识符、数字等。正则表达式是一种简洁强大的表示字符串模式的方法。NFA是非确定有限自动机，它在处理正则表达式时具有灵活性，可以匹配多个路径。 - **NFA到DFA转换**：虽然NFA更灵活，但DFA（确定有限自动机）在执行效率上更优。词法分析器通常需要DFA来进行高效的词法分析。NFA到DFA的转换是编译器设计中的一项关键技术，通过消除ε转移和合并等操作，将NFA转换为等价的DFA。 - **词法分析器实现**：文件`Lex.cpp`很可能包含了词法分析器的实现，它读取源代码，生成一系列的标记（tokens），为语法分析提供输入。 2. **语法分析**： - **LR分析**：LR（Left-to-Right, Leftmost Derivation）分析是一种自底向上的语法分析方法。LR1分析器在每个状态上附加一个FOLLOW集，帮助决策何时进行移进和归约操作。`syntactic_analyzer.cpp`可能是这个部分的代码实现。 - **LR1解析表**：LR1解析表是LR分析的核心，它指示了在读入某个符号时应执行的操作。`table.txt`可能存储了LR1分析表，用于指导解析过程。 - **过程与错误处理**：`process.txt`可能记录了分析过程的详细信息，包括成功解析的步骤或遇到的错误。这对于调试和理解编译器行为非常有用。 3. **其他文件**： - `syntax.txt`：可能包含项目所用的上下文无关文法（CFG）定义，这是语法分析的基础。 - `TEX.cbp`、`TEX.depend`、`TEX.layout`：这些看起来像是工程文件，可能用于项目构建和配置。 - `obj`：通常表示一个对象文件或目录，包含编译后的代码片段。 - `Sample input`：可能包含用于测试词法和语法分析器的示例输入源代码。在实际课程设计中，学生需要理解这些概念，编写相应的代码，并通过测试用例确保词法分析器和语法分析器能够正确运行。这个过程不仅锻炼了对编译原理的理解，也提升了对数据结构和算法的实际应用能力。

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编译原理课程设计包括词法分析器（nfa转dfa）和语法分析器（LR1实现）.zip （18个子文件）

process.txt 36KB

TEX.depend 185B

TEX.cbp 1KB

obj

Debug

syntactic_analyzer.o 820KB

main.o 820KB

Sample input

book

Lex.cpp 15B

syntax.txt 41B

origin

Lex.cpp 208B

syntax.txt 975B

complex

Zprogram.txt 142B

Lex.cpp 660B

syntax.txt 1KB

Lex.cpp 660B

bin

Debug

TEX.exe 1.6MB

table.txt 65KB

syntactic_analyzer.cpp 11KB

TEX.layout 176B

syntax.txt 1KB

I0: PROGRAM->. int id ( ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/# PROGRAM->. int id ( ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/int PROGRAM_LIST->. PROGRAM ,/# PROGRAM_LIST->. PROGRAM ,/int PROGRAM_LIST->. PROGRAM_LIST PROGRAM ,/# PROGRAM_LIST->. PROGRAM_LIST PROGRAM ,/int S->. PROGRAM_LIST ,/# S'->. S ,/# I1: PROGRAM_LIST->PROGRAM .,/# PROGRAM_LIST->PROGRAM .,/int I2: PROGRAM->. int id ( ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/# PROGRAM->. int id ( ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/int PROGRAM_LIST->PROGRAM_LIST . PROGRAM ,/# PROGRAM_LIST->PROGRAM_LIST . PROGRAM ,/int S->PROGRAM_LIST .,/# I3: S'->S .,/# I4: PROGRAM->int . id ( ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/# PROGRAM->int . id ( ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/int I5: PROGRAM_LIST->PROGRAM_LIST PROGRAM .,/# PROGRAM_LIST->PROGRAM_LIST PROGRAM .,/int I6: PROGRAM->int id . ( ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/# PROGRAM->int id . ( ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/int I7: PROGRAM->int id ( . ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/# PROGRAM->int id ( . ) { DECLARATION_STATEMENT STATEMENT_LIST } ,/int I8: PROGRAM->int id ( ) . { DECLARATION_STATEMENT STATEMENT_LIST } ,/# PROGRAM->int id ( ) . { DECLARATION_STATEMENT STATEMENT_LIST } ,/int I9: DECLARATION->. TYPE_SPECIFIER ID_LIST ; ,/(/digit/for/id/if/printf/scanf(/{ DECLARATION->. TYPE_SPECIFIER ID_LIST ; ,/float/int DECLARATION_STATEMENT->. DECLARATION ,/(/digit/for/id/if/printf/scanf(/{ DECLARATION_STATEMENT->. DECLARATION ,/float/int DECLARATION_STATEMENT->. DECLARATION_STATEMENT DECLARATION ,/(/digit/for/id/if/printf/scanf(/{ DECLARATION_STATEMENT->. DECLARATION_STATEMENT DECLARATION ,/float/int TYPE_SPECIFIER->. float ,/id TYPE_SPECIFIER->. int ,/id PROGRAM->int id ( ) { . DECLARATION_STATEMENT STATEMENT_LIST } ,/# PROGRAM->int id ( ) { . DECLARATION_STATEMENT STATEMENT_LIST } ,/int I10: DECLARATION_STATEMENT->DECLARATION .,/(/digit/for/id/if/printf/scanf(/{ DECLARATION_STATEMENT->DECLARATION .,/float/int I11: ASSIGN_EXPRESSION->. LEFT_VALUE = EXPRESSION ,/; DECLARATION->. TYPE_SPECIFIER ID_LIST ; ,/(/digit/for/id/if/printf/scanf(/{ DECLARATION->. TYPE_SPECIFIER ID_LIST ; ,/float/int ITERATION_EXPRESSION->. for ( ASSIGN_EXPRESSION ; M RELATION_EXPRESSION ; M INC_EXPRESSION ) STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ ITERATION_EXPRESSION->. for ( ASSIGN_EXPRESSION ; M RELATION_EXPRESSION ; M INC_EXPRESSION ) STATEMENT ,/} LEFT_VALUE->. id ,/= LEFT_VALUE->. id [ EXPRESSION ] ,/= SELECTION_STATEMENT->. if ( M RELATION_EXPRESSION ) STATEMENT M else STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ SELECTION_STATEMENT->. if ( M RELATION_EXPRESSION ) STATEMENT M else STATEMENT ,/} STATEMENT->. ITERATION_EXPRESSION ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. ITERATION_EXPRESSION ,/} STATEMENT->. SELECTION_STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. SELECTION_STATEMENT ,/} STATEMENT->. ASSIGN_EXPRESSION ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. ASSIGN_EXPRESSION ; ,/} STATEMENT->. RETURN EXPRESSION ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. RETURN EXPRESSION ; ,/} STATEMENT->. { STATEMENT_LIST } ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. { STATEMENT_LIST } ,/} STATEMENT->. printf ( string ) ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. printf ( string ) ; ,/} STATEMENT->. printf ( string ,M ID_LIST ) ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. printf ( string ,M ID_LIST ) ; ,/} STATEMENT->. scanf( string , & id ) ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. scanf( string , & id ) ; ,/} STATEMENT_LIST->. STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT_LIST->. STATEMENT ,/} STATEMENT_LIST->. STATEMENT_LIST STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT_LIST->. STATEMENT_LIST STATEMENT ,/} TYPE_SPECIFIER->. float ,/id TYPE_SPECIFIER->. int ,/id DECLARATION_STATEMENT->DECLARATION_STATEMENT . DECLARATION ,/(/digit/for/id/if/printf/scanf(/{ DECLARATION_STATEMENT->DECLARATION_STATEMENT . DECLARATION ,/float/int PROGRAM->int id ( ) { DECLARATION_STATEMENT . STATEMENT_LIST } ,/# PROGRAM->int id ( ) { DECLARATION_STATEMENT . STATEMENT_LIST } ,/int I12: ID_LIST->. id ,/, ID_LIST->. id ,/; ID_LIST->. ID_LIST , id ,/, ID_LIST->. ID_LIST , id ,/; ID_LIST->. id [ digit ] ,/, ID_LIST->. id [ digit ] ,/; ID_LIST->. id [ digit ] = { DIGIT_LIST } ,/, ID_LIST->. id [ digit ] = { DIGIT_LIST } ,/; DECLARATION->TYPE_SPECIFIER . ID_LIST ; ,/(/digit/for/id/if/printf/scanf(/{ DECLARATION->TYPE_SPECIFIER . ID_LIST ; ,/float/int I13: TYPE_SPECIFIER->float .,/id I14: TYPE_SPECIFIER->int .,/id I15: STATEMENT->ASSIGN_EXPRESSION . ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->ASSIGN_EXPRESSION . ; ,/} I16: DECLARATION_STATEMENT->DECLARATION_STATEMENT DECLARATION .,/(/digit/for/id/if/printf/scanf(/{ DECLARATION_STATEMENT->DECLARATION_STATEMENT DECLARATION .,/float/int I17: STATEMENT->ITERATION_EXPRESSION .,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->ITERATION_EXPRESSION .,/} I18: ASSIGN_EXPRESSION->LEFT_VALUE . = EXPRESSION ,/; I19: E->. T ,/+ E->. T ,/- E->. T ,/; E->. E + T ,/+ E->. E + T ,/- E->. E + T ,/; E->. E - T ,/+ E->. E - T ,/- E->. E - T ,/; EXPRESSION->. E ,/; F->. digit ,/* F->. digit ,/+ F->. digit ,/- F->. digit ,// F->. digit ,/; F->. id ,/* F->. id ,/+ F->. id ,/- F->. id ,// F->. id ,/; F->. ( E ) ,/* F->. ( E ) ,/+ F->. ( E ) ,/- F->. ( E ) ,// F->. ( E ) ,/; F->. id [ EXPRESSION ] ,/* F->. id [ EXPRESSION ] ,/+ F->. id [ EXPRESSION ] ,/- F->. id [ EXPRESSION ] ,// F->. id [ EXPRESSION ] ,/; T->. F ,/* T->. F ,/+ T->. F ,/- T->. F ,// T->. F ,/; T->. T * F ,/* T->. T * F ,/+ T->. T * F ,/- T->. T * F ,// T->. T * F ,/; T->. T / F ,/* T->. T / F ,/+ T->. T / F ,/- T->. T / F ,// T->. T / F ,/; STATEMENT->RETURN . EXPRESSION ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->RETURN . EXPRESSION ; ,/} I20: STATEMENT->SELECTION_STATEMENT .,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->SELECTION_STATEMENT .,/} I21: STATEMENT_LIST->STATEMENT .,/(/digit/for/id/if/printf/scanf(/{ STATEMENT_LIST->STATEMENT .,/} I22: ASSIGN_EXPRESSION->. LEFT_VALUE = EXPRESSION ,/; ITERATION_EXPRESSION->. for ( ASSIGN_EXPRESSION ; M RELATION_EXPRESSION ; M INC_EXPRESSION ) STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ ITERATION_EXPRESSION->. for ( ASSIGN_EXPRESSION ; M RELATION_EXPRESSION ; M INC_EXPRESSION ) STATEMENT ,/} LEFT_VALUE->. id ,/= LEFT_VALUE->. id [ EXPRESSION ] ,/= SELECTION_STATEMENT->. if ( M RELATION_EXPRESSION ) STATEMENT M else STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ SELECTION_STATEMENT->. if ( M RELATION_EXPRESSION ) STATEMENT M else STATEMENT ,/} STATEMENT->. ITERATION_EXPRESSION ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. ITERATION_EXPRESSION ,/} STATEMENT->. SELECTION_STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. SELECTION_STATEMENT ,/} STATEMENT->. ASSIGN_EXPRESSION ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. ASSIGN_EXPRESSION ; ,/} STATEMENT->. RETURN EXPRESSION ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. RETURN EXPRESSION ; ,/} STATEMENT->. { STATEMENT_LIST } ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. { STATEMENT_LIST } ,/} STATEMENT->. printf ( string ) ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. printf ( string ) ; ,/} STATEMENT->. printf ( string ,M ID_LIST ) ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. printf ( string ,M ID_LIST ) ; ,/} STATEMENT->. scanf( string , & id ) ; ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT->. scanf( string , & id ) ; ,/} STATEMENT_LIST->STATEMENT_LIST . STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ STATEMENT_LIST->STATEMENT_LIST . STATEMENT ,/} PROGRAM->int id ( ) { DECLARATION_STATEMENT STATEMENT_LIST . } ,/# PROGRAM->int id ( ) { DECLARATION_STATEMENT STATEMENT_LIST . } ,/int I23: ITERATION_EXPRESSION->for . ( ASSIGN_EXPRESSION ; M RELATION_EXPRESSION ; M INC_EXPRESSION ) STATEMENT ,/(/digit/for/id/if/printf/scanf(/{ ITERATION_EXPRESSION->for . ( ASSIGN_EXPRESSION ; M RELATION_EXPRESSION ; M INC_EXP

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