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Description: 一、 实验内容
S语言的编译程序的词法分析部分实现
从左到右扫描每行S语言源程序的符号，拼成单词，换成内部表示（token）
二、 实验要求
要求实现编译器的以下功能：
组织源程序的输入
按规则拼写单词，并转换成二元形式
删除空格及无用符号（如回车符，字符常数的引号符等）
发现并定位错误
建立单词表、符号表、常数表等文件
三、 实现方法
数据结构
1、 输入
S语言源程序，为文本文件
2、 输出
词法分析程序的运行结果是：产生一个单词序列文件（token文件）和一个常数表、一个符号表文件，并输出错误信息。
（1） token文件结构
token文件用于存放从S语言源程序中扫描出来的一个个单词符号的机内表示，其文件结构如下：
typedef struct token
{
nt label
char name[30]
int code
int addr
}token
说明：
label：单词序号；
name[30]：单词本身；
code：单词的编辑；
addr：地址，单词本身保留字时值为-1，为标识符成常数时为大于0常数，即该标识符成常数在符号表中的入口地址。
-one, Experiment S language compiler of lexical analysis to achieve whatever S scanning each line of source language symbols, makes up words, replaced internal said (token) 2, the experimental requirements call for compiler of the following functions :
Platform: |
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Author: 范鹏 |
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Description: //led.v
/*-------------------------------------
LED显示模块：led(CLK,AF,ADDR,DATA)
功能： 显示
注意事项： 8位LED
参数： CLK:扫妙时钟输入，推荐1kHz
AF:数码管输出，a～h
ADDR:数码管选择位数出，0~2
DATA:显示数据输入0~9999 9999
编写人： 黄道斌
编写日期： 2006/07/13
-------------------------------------*/-/ / led.v /*--------------------------- ---------- LED Display Module : led (CLK, AF, ADDR. DATA) function : to show : 8 LED parameters : CLK : So Wonderful clock input, Suggest 1kHz AF : digital tube output, a ~ h ADDR : digital control options from the median, 0 ~ 2 DATA : data show that the importation of 0 ~ 9999 9999 prepared : Huang Daobin preparation date : 2006/07/13 ------------------------------ -------*/
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Description: EEPROM 24CXX应用程序供参考
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Description: 含此文档只表示此压缩包来自于DELPHI盒子网站
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2003-9-25 第9次改版正式开通，每日更新。
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Author: sbl |
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Description: 含此文档只表示此压缩包来自于DELPHI盒子网站
-------------------------------------------------------------------------
DELPHI盒子 二零零三新版
http://www.2ccc.com
http://www.delphibox.com
Email:root@2ccc.com
DELPHI相关源码下载，作品发布，个性论坛，支持WEB/FTP文件上传，会员WEB空间，VIP会员***@2ccc.com邮箱。
2ccc技术论坛
http://bbs.2ccc.com
2ccc个人网络空间，免费8M永久使用web空间，可以上传任何文件，上传进度显示，送个人留言板，VIP会员可申请100M空间。
http://my.2ccc.com
2003-9-25 第9次改版正式开通，每日更新。
--------------------------------------------------------------------------
DELPHIBOX New Version @ 2003
http://www.2ccc.com
http://www.delphibox.com
Email:root@2ccc.com
DELPHI Code,App,Simple to Publish,forum,WEB/FTP uploads Support,member WEB Space or email addr.
2ccc Tech Forum.
http://bbs.2ccc.com
2ccc Web Space,Free 8M Space,Upload any file-type.
http://my.2ccc.com
2003-9-25 New Version WebSite ninthly,Update everyday.-with this document only said that the package of compressed from the box DELPHI website ------------ ---------------------------------------- DELPHI box --------------------- 2003 New http : / / www.2ccc.com http : / / www.delphibox.com Email : root@2ccc.com DELPHI relevant source download, works published, personality Forum support Web / FTP file uploads, Member Web space, VIP Member *** @ 2ccc.com mail. 2ccc Technical Forum http://bbs.2ccc.com 2ccc personal network space, 8 M permanent free use of web space, can upload any document upload progress indicates that sent personal message board, VIP members can apply for 100 M space. Http://my.2ccc.com 2003-9-25 9th revision opened updated daily. ---------------------------------------- ---------------------------------- DELPHI New Version @
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