C语言词法分析程序java版.doc

附录：核心代码清单 C 语言词法分析代码 算法实习--------------------------------------------------------By NLLWRQ 功能类： package conversion; import java.io.*; public class Work{ public String filename; public int flage = 1; public int error[] = {0,0,0,0,0}; public int error1[] = {0,0,0,0,0,0}; StringBuffer buffer = new StringBuffer(); private String Keychar[]={int,char,long,float,double,short,unsigned,struct,union,enum,auto,extern, static,register,typedef,void,if,else,switch,case,default,do,while,for,break,continue,return,goto,define,include,undef,ifdef,endif,line,sizeof,asm,fortran,ada,pascal}; private String Keyfile[]={stdio,windows,stdlib, ctype,math,time,string}; public Work(String filename) { this.filename = filename; } boolean isKeyfile(String ch){ for(int i=0;iKeyfile.length;i++) if(Keyfile[i].equals(ch)) return true; return false; } boolean isKeychar(String ch){ for(int i=0;iKeychar.length;i++) if(Keychar[i].equals(ch)) return true; return false; } boolean isDigit(char ch) { if (ch = 0 ch = 9) return true; else return false; } boolean isLeter(char ch) { if ((ch = A ch = Z) || (ch = a ch = z) || ch==_) return true; else return false; } boolean isendline(char ch) { if(ch==@) return true; else return false; } public void readFile() throws FileNotFoundException { try { FileReader fr = new FileReader(this.filename); BufferedReader br = new BufferedReader(fr); String temp = null; char end = @; while ((temp = br.readLine()) != null) { buffer.append(temp); buffer.append(end); } } catch (Exception e) { System.out.println(文件操作错误： + e.toString()); } } public String Analysis() { int i = 0; char ch; String str1= ; ViewFile a = null ; while (i buffer.length()) { ch = buffer.charAt(i); if (isLeter(ch)) { StringBuffer temp = new StringBuffer(); temp.append(ch); ch = buffer.