#include "stdafx.h"//运行环境visuals studio
#include<iostream>
#include<fstream>
#include<string>
using namespace std;
string key[33]={"","auto","double","int","struct","break","else","long","switch",
"case", "enum","register","typedef","char","extern","return","union","const",
"float","short","unsigned","continue","for","signed","void","default","goto",
"sizeof","volatile","do","if","while","static"};
string helpkey[33]={"","$auto","$double","$int","$struct","$break","$else","$long","$switch",
"$case", "$enum","$register","$typedef","$char","$extern","$return","$union","$const",
"$float","$short","$unsigned","$continue","$for","$signed","$void","$default","$goto",
"$sizeof","$volatile","$do","$if","$while","$static"};
string writeCode(int code){
for(int i=1;i<33;i++)
if(i==code)
return helpkey[i];
return "";
}
bool isLetter(char ch){
if((ch>=65&&ch<=90)||(ch>=97&&ch<=122))
return true;
else
return false;
}
bool isDigit(char ch){
if(ch>=48&&ch<=57)
return true;
else
return false;
}
int reserve(const string &s){
for(int i=1;i<33;i++)
if(s==key[i])
return i;
return 0;
}
void strAly(string &s,ofstream &out){
size_t i=0,code;
char ch;
string temp="";
ch=s[i];
while(i<s.length()){
while(i<s.length()&&ch==' '){
i++;
ch=s[i];
}
if(isLetter(ch)){
while((isLetter(ch)||isDigit(ch))&&i<s.length()){
temp+=ch;
i++;
ch=s[i];
}
i--;
code=reserve(temp);
if(code==0){
out<<temp<<'\t'<<"标识符"<<'\t'<<0<<'\t'<<"$ID"<<endl;
temp="";
}
else{
