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1、《C语言词法分析器》开发文档PoweredBy萌萌的玉雪一、实验题目编制并调试C词法分析程序。二、实验目的全面深入理解高级语言程序设计知识，掌握应用技巧，提高应用与分析能力。三、主要函数voidload()voidchar_search(char*word)voidmain()voidintb_search(char*word)voidscan()voidc_search(char*word)voidinta_search(char*word)voidcc_search(char*word)四、设计1.主函数voi
2、dmain()绘制程序界面调用初始化函数：voidload()实现文件的建立调用主扫描函数：voidscan()实现文件的扫描分析完成后指引用户查看相关文件，直到用户输入退出命令函数结束2.初始化函数voidload()通过文件指针建立相关文件函数结束3.保留字及标识符判断函数voidchar_search(char*word)接收数据是否为保留字否：查标识符表是：写入输出文件没找到：写入表文件找到：写入输出文件写入输出文件4.整数类型判断函数voidinta_search(char*word)接收数据找到：写入输
3、出文件写入输出文件查表没找到：写入整数常量表文件5.浮点类型判断函数voidintb_search(char*word)没找到：写入整数常量表文件找到：写入输出文件查表接收数据写入输出文件6.字符串常量判断函数voidcc_search(char*word)7.字符常量判断函数voidc_search(char*word)同4、5函数图8.主扫描函数voidscan()函数开始读入源文件中的一个单词判断宏定义忽略无效字符忽略调用保留字及标识符函数voidchar_search进行处理字符串字符常量调用字符常量判断函
4、数voidc_search进行处理调用字符串常量判断函数voidcc_search进行处理字符串常量整数常量调用整数类型判断函数voidinta_search进行处理调用浮点类型判断函数voidintb_search进行处理浮点数常量注释写入注释文件查运算符、分隔符表并写入输出文件限制符五、关键代码#include#include#includechar*key0[]={"","auto","break","case","char","const","con
5、tinue","default","do","double","else","enum","extern","float","for","goto","if","int","long","register","return","short","signed","sizeof","static","struct","switch","typedef","_Complex","_Imaginary","union","unsigned","void","volatile","while"};/*保留字表*/char*k
6、ey1[]={"","(",")","[","]","{","}",",",";","'"};/*分隔符表*/char*key2[]={"","+","-","*","/","%","<",">","==",">=","<=","!=","!","&&","
7、
8、","<<",">>","~","
9、","^","&","=","?:","->","++","--",".","+=","-=","*=","/="};/*运算符表*/intxx0[35],xx1[10],xx2[31];inttemp_key3=0,te
10、mp_c40=0,temp_c41=0,temp_c42=0,temp_c43=0;/*******初始化函数*******/voidload(){intmm;for(mm=0;mm<=34;mm++){xx0[mm]=0;}for(mm=0;mm<=9;mm++){xx1[mm]=0;}for(mm=0;mm<=30;mm++){xx2[mm]=0;}FILE*floading;if((floading=fopen("key0.txt","w"))==NULL){printf("Error!Can'tcreate
11、file:key0.txt");return;}fclose(floading);/*建立保留字表文件：key0.txt*/if((floading=fopen("key1.txt","w"))==NULL){printf("Error!Can'tcreatefile:key1.txt");return;}/*建立分隔符表文件：key1.txt*/if((f
