HOJ ( acm.hdu.edu.cn ) 1088

#include<iostream>
#include<cstring>
#include<cstdlib>
using namespace std;

enum token_type
{
  WORD_,
  TAG_,
  SPACE_
};

token_type get_token_by_char(char ch)
{
  if( ch==' ' || ch=='\t' || ch=='\n' )
  {
      return SPACE_;
  }
  else if ( ch=='<' )
  {
      return TAG_;
  }
  return WORD_;
}

void tell_curr_token(token_type token)
{
  if(token==WORD_)cout<<"WORD"<<endl;
  else if(token==TAG_)cout<<"TAG"<<endl;
  else if(token==SPACE_)cout<<"SPACE"<<endl;
  else cout<<(int)token<<endl;
}

void translate()
{
  token_type curr_token;
  char token_value[81]={0};
  int  token_len=0;
  int  line_len =0;
  char ch;

  //初始化
  cin.get(ch);
  curr_token=get_token_by_char(ch);
  token_value[token_len++]=ch;

  while(cin.get(ch))
  {
//      tell_curr_token(curr_token);
      switch(curr_token)
      {
          case SPACE_:
              if( ch==' ' || ch=='\t' || ch=='\n' )
              {
                  token_value[token_len++]=ch;
              }
              else
              {
                  if (line_len+1>=80)
                  {
                      cout<<"\n";
                      line_len=0;
                  }
                  else if(line_len>0)
                  {
                      cout<<" ";
                      ++line_len;
                  }
                  token_len=0;
                  memset(token_value,0,81);
                  curr_token=get_token_by_char(ch);
                  token_value[token_len++]=ch;
              }
              break;
          case TAG_:
              if( ch=='>' )
              {
                  if(!cin.get(ch))return;
                  if (! strcmp( token_value,"<br" ))
                  {
                      cout<<"\n";
                      line_len=0;
                  }
                  else
                  {
                      if (line_len>0) cout<<"\n";
                      for(int i=0;i<80;++i) cout<<'-';
                      line_len=0;
                  }
                  token_len=0;
                  memset(token_value,0,81);
                  curr_token=get_token_by_char(ch);
                  token_value[token_len++]=ch;
              }
              else
              {
                  token_value[token_len++]=ch;
              }
              break;
          case WORD_:
              if( ch!=' ' && ch!='\t' && ch!='\n' && ch!='<' )
              {
                  token_value[token_len++]=ch;
              }
              else
              {
                  if (token_len+line_len>80)
                  {
                      cout<<"\n"<<token_value;
                  }
                  else
                  {
                      cout<<token_value;
                      line_len+=token_len;
                  }
                  token_len=0;
                  memset(token_value,0,81);
                  curr_token=get_token_by_char(ch);
                  token_value[token_len++]=ch;
              }
              break;
          default:
              cout<<"Something wrong!"<<endl;
              system("pause");
              return;
      }
  }
}

int main()
{
  translate();
  return 0;
}