作业帮编译原理词法分析器求一个词法分析的源代码
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编译原理词法分析器求一个词法分析的源代码
编译原理词法分析器
求一个词法分析的源代码
编译原理词法分析器求一个词法分析的源代码
用C++语言
#include
#include
#include
#include
#include
#include
#define NULL 0
FILE *fp;
char ch;
char *keyword[34]={"auto","break","case","char","const","continue","default","do","double",
"else","enum","extern","float","for","goto","if","int","long","register",
"return","short","signed","sizeof","static","struct","switch","typedef","printf",
"union","unsigned","void","volatile","while","main"};
char *operatornum[6]={"+","-","*","/","++","--"};
char *comparison[8]={"=","","==","!="};
char *interpunction[8]={",",";",":=",".","(",")","{","}"};
char *biaoshifu[6]={"%","$","^","&","_","#"};//特殊标识符
char *zhushifu[3]={"//","/*","*/"};//注释符
char *luoji[3]={"&&","||","!"};//逻辑运算符
//////////////////////////////////////////////////////////////////////////////////////////
bool search(char searchstr[],int wordtype)
{
int i;
switch (wordtype)
{
case 1:for(i=0;i