tz.cpp

·典型实用的利用tapstry、spring、hibernate

  #include<iostream.h> 
  #include<fstream.h>  
  #include<string.h>   
  char   *   KeyWord[39]={"auto","break","case","char","const",   
                          "default","do","double","else","enum","extern","try",   
                          "float","for","goto","if","int","long","return",   
                          "short","signed","sizeof","static","switch",   
                          "unsigned","void","while","catch","class",   
                          "const_cast","delete","friend","new","operator",   
                          "private","protected","public","template","this"};   
  int   i=0,j=0,k=0,t=0,a=0;//搜索指示器   
  char   ch;//存放最新读入的原程序字符   
  char   strToken[15];//存放构成单词符号的字符串   
  char   *   chr_form[100];//字符表   
  char   *   int_form[100];//常数表   
  char   form[1000],*form1[100];   
  int   q=0;   
  int   temp; 
  fstream f1;
  void   GetChar()//将下一个字符读入ch中,搜索指示器前移一字符位   
  {   
  ch=form[k];   
  k++;   
  }   
  void   GetBC()//检查ch中的字符是否为空白,若是则调用Getchar直至ch中进入一个非空白字符   
  {   
  while(ch=='   ')   
  {     
  GetChar();   
  }   
  }   
  void   Concat()//将ch中的字符连接到strToken之后,   
  {   
  strToken[i]=ch;   
  i++;   
  }   
  bool   IsLetter()//判断ch中的字符是否为字符   
  {   
  if(((ch<='z')&&(ch>='a'))||((ch<='Z')&&(ch>='A')))   
  return(1);   
  else   
  return(0);     
  }   
  bool   IsDigit()//判断ch中的字符是否为数字   
  {     
  if(((ch)<='9')&&((ch)>='0'))   
  return   (1);   
  else   
  return   (0);   
  }   
  int   Reserve()//对strToken中的字符串查找保留字表,若它是一个保留字   
  //则返回它的编码,否则返回-1值   
  {   
  for(int   q=0;q<39;q++)   
  {   
  if   (strcmp(KeyWord[q],strToken)==0)   
  return  q;   
  if(q==38)   
  return   -1;   
  }   
  }   
  void   Retract()//将搜索指示器回调一个字符位置,将ch置为空白字符   
  {   
  k--;   
  ch=NULL;   
  }   
  char*InsertId()//将strToken中的标识符插入符号表,返回符号表的指针   
  {   
  chr_form[j]=strToken;   
  j++;   
  return   chr_form[0];   
    
  }   
  char   *InsertConst()//将strToken中的常数插入常数表,返回常数表指针   
  {   
  int_form[t]=strToken;   
  t++;   
  return   int_form[0];   
  }   
  int   code;   
  //////////////////////////////////////////////////////////////////////   
  void   analyze()   
  {  
  GetChar();   
  GetBC();      
  if(IsLetter())   
  {   
  while(IsLetter()||IsDigit())   
  {   
  Concat();   
  GetChar();   
  }    
  Retract();   
  code=Reserve();   
  switch(code)   
  {   
  case -1:cout<<"<字符串ID,指向"<<strToken<<"的符号指针>"<<endl;
	      f1.write("<ID,",4);
		  f1.write(strToken,strlen(strToken));
		  f1.write(">\n",3);
	      break;   
  default:cout<<"<关键字,"<<strToken<<">"<<endl;
	      f1.write("<关键字,",8);
		  f1.write(strToken,strlen(strToken));
		  f1.write(">\n",3);
  }   
  }   
  else   
  {   
  if(IsDigit())   
  {   
  while(IsDigit()||ch=='.')   
  {   
  Concat();   
  GetChar();   
  }   
  Retract();   
  cout<<"<常数,"<<strToken<<">"<<endl;
  f1.write("<常数,",6);
  f1.write(strToken,strlen(strToken));
  f1.write(">\n",3);
  }   
  else   
  {   
  switch   (ch)   
    
  {   
  case   '=':   
  case   '/':   
  case   '%':   
  case   '*':cout<<"<运算符，"<<ch<<">"<<endl;
	         f1.write("<运算符,",8);
		     f1.put(ch);
		     f1.write(">\n",3);break;   
  case   '-':   
  GetChar();   
    if(ch=='-')   
    {   
  cout<<"<运算符,"<<"-->"<<endl;
  f1.write("<运算符,-->\n",13);break;   
   }   
    else   
    {   
  Retract();   
    cout<<"<运算符，"<<"->"<<endl;
    f1.write("<运算符,->\n",12);
   break;   
	}   
  case   '+':   
    GetChar();   
    if(ch=='+')   
    {   
    cout<<"<运算符，"<<"++>"<<endl;
     f1.write("<运算符,++>\n",13);break;   
	}   
    else   
    {   
  Retract();   
  cout<<"<运算符，"<<"+>"<<endl;
   f1.write("<运算符,+>\n",12);break; 
    }   
  case   '|':   
  GetChar();   
    if(ch=='|')   
    {   
    cout<<"<运算符，"<<"||>"<<endl;
     f1.write("<运算符,||>\n",13);break;
    }   
    else   
    {   
  Retract();   
  cout<<"<非法符号，"<<"|>"<<endl; 
     f1.write("<运算符,|>\n",12);break;
    }   
  case   '&':   
  GetChar();   
    if(ch=='&')   
    {   
  cout<<"<运算符，"<<"&&>"<<endl;
    f1.write("<运算符,&&>\n",13);break;
    }   
  case   '(':   
  case   ';':   
  case   ')':   
  case   ':':   
  case'[':   
  case']':   
  case   '"':   
  case'\'':   
  case   '{':   
  case   ',':   
  case   '}':cout<<"<界符,"<<ch<<">"<<endl;
	         f1.write("<界符,",6);
	         f1.put(ch);
	         f1.write(">\n",3);break;
  case   '<':   
  GetChar();   
    if(ch=='<')   
    {   
  cout<<"<运算符，"<<"<<>"<<endl;
   f1.write("<运算符,<<>\n",13);break;
    }   
    else   
    {   
  cout<<"<界符,"<<"<>"<<endl;
   f1.write("<运算符,<>\n",12);break;
    }   
  case '>':   
  GetChar();   
    if(ch=='>')   
    {   
  cout<<"<运算符，"<<">>>"<<endl;   
    f1.write("<运算符,>>>\n",13);break;
	}   
    else   
    {   
  Retract();   
  cout<<"<界符，"<<">>"<<endl;   
    f1.write("<运算符,>>\n",12);break;
    }
  }   
  }   
  }   
  while(k<q)   
  {     
  for(int   p=0;p<50;p++)   
  strToken[p]='\0';   
  i=0;   
  analyze();   
  }   
  }   
  void  main()   
  { 
   fstream file;
   file.open("tz.txt",ios::in);
   if(!file)
   {
	cout<<"can't open tz.txt.\n";
   }
   f1.open("result.txt",ios::out);
   if(!f1)
   {
	cout<<"can't open result.txt.\n";
   }
   file.get(ch);
   form[0]=ch;
  for(   q=1;form[q-1]!='#';q++)   
  {   
    file.get(ch);
	form[q]=ch;
  if(form[q]=='#')   
  {   
  cout<<"你文件里的程序段为的程序段为\t";   
  file.write(form,q);
  for(q=0;q<strlen(form);q++)
	  cout<<form[q];
  break;   
  }   
  } 
  file.close();
  cout<<endl;   
  analyze();
  f1.close();
  }