KWIC

#include<stdio.h>
 #include<iostream>
 #include<vector>
 #include<string>
 #include<sstream>
 #include<fstream>
 #include<string.h>
 #include<algorithm>using namespace std;
class Filter;
 class Pipe 
 {
  friend class Filter;
  friend class InputFilter;
  friend class Shift_Filter;
  friend class Sort_Filter;
  friend class Store_Filter;
 private:
  vector<string> buf;
 };
 class Filter
 {
 protected:
  Pipe input_Pipe; //输入管道
  Pipe output_Pipe; //输出管道
 public:
  virtual void Transform()=0; //将输入管道的数据流改造后放入输出管道 
  void ReadIn(const Filter& f ) //从相邻过滤器中输出管道中读取数据放入本地过滤器的输入管道
  {
   vector<string>::const_iterator it=f.output_Pipe.buf.begin();
   for(;it!=f.output_Pipe.buf.end();it++)
   {
    input_Pipe.buf.push_back(*it);
   }
  }
 };
 class Shift_Filter;
 class InputFilter:public Filter
 {
  friend class Shift_Filter;
 public:
  void ReadIn();
  void Transform();
 };
 void InputFilter::ReadIn()
 {
  string filename; //要打开的文件名
  string line,word; //line用于读取文件中每一行,word代表读取每一个单词
  bool suc=false;  //suc代表操作是否成功
  while(!suc)
  {
   cout<<"请输入文本文件名:";
   cin>>filename;
   fstream file(filename.c_str()); //定义文件流对象
   if(!file)
   {
    cout<<"输入的文件不存在!"<<endl;
   }
   else
   {
    cout<<"文件打开成功!"<<endl;
    while(getline(file,line))
    {
     input_Pipe.buf.push_back(line); //将每行句子输入管道
    }
    suc=true;
    file.close();
   }
  }
 }
 void InputFilter::Transform()
 {
  vector<string>::iterator it;
  for(it=input_Pipe.buf.begin();it!=input_Pipe.buf.end();it++)
  {
   output_Pipe.buf.push_back(*it);
  }
 }class Sort_Filter;
 class Shift_Filter:public Filter
 {
  friend class Sort_Filter;
 public:
  void Transform();
 };void Shift_Filter::Transform()
 {
  int cnt; //每一行空格数
  int i,j;
  string temp;
  vector<string>::iterator it;
  for(it=input_Pipe.buf.begin();it!=input_Pipe.buf.end();it++)
  {
   cnt=0;
   string line=*it;
   for(i=0;line[i];i++)
   {
    if(line[i]==' ') cnt++;
   }
   int k;
   for(k=0;k<=cnt;k++) //将line循环移位
   {
    string temp;
    for(i=0;line[i]!=' ';i++) temp+=line[i];
    i++;
    j=0;
    while(line[i])
    {
     line[j++]=line[i++];
    }
    line[j++]=' ';
    for(i=0;temp[i];i++) line[j++]=temp[i];
    output_Pipe.buf.push_back(line);
   }
  }
  cout<<"循环移位后的英文句子是:"<<endl;
  for(it=output_Pipe.buf.begin();it!=output_Pipe.buf.end();it++)
  {
   cout<<*it<<endl;
  }
 }
 class Store_Filter;
 class Sort_Filter:public Filter
 {
  friend class Store_Filter;
 public:
  void Transform();
 };
 //函数对象
 class LessThen
 {
 public:
  bool operator()(const string& one,const string& other) //one小于other返回true,否则返回false;
  {
   stringstream ss1(one),ss2(other);
   string word1,word2;
   while(ss1>>word1 && ss2 >>word2)
   {
    if(word1<word2) return true;
    else if(word1>word2) return false;
    else continue;
   }
   if(!ss1 && !ss2) return false;
   else if(!ss1) return true;
   else return false;
  }
 };void Sort_Filter::Transform()
 {
  sort(input_Pipe.buf.begin(),input_Pipe.buf.end(),LessThen());
  vector<string>::const_iterator it;
  cout<<"排序后的英文句子是:"<<endl;
  for(it=input_Pipe.buf.begin();it!=input_Pipe.buf.end();it++)
  {
   output_Pipe.buf.push_back(*it);
   cout<<*it<<endl;
  }
 }
 class Store_Filter:public Filter
 {
 public:
  Store_Filter():storefile(0)
  {
  }
  void Transform();
  FILE *getFile() const
  {
   return storefile;
  }
 private:
  FILE *storefile; //用于存储数据流的文件指针
 };
 void Store_Filter::Transform()
 {
  string filename;
  cout<<"请输入要写入数据的文本文件名(*.txt)"<<endl;
  cin>>filename;
  storefile=fopen(filename.c_str(),"w+");
  if(!storefile)
  {
   cout<<"文件创建失败!"<<endl;
   return;
  }
  string line;
  vector<string>::const_iterator it;
  for(it=input_Pipe.buf.begin();it!=input_Pipe.buf.end();it++)
  {
   fprintf(storefile,(*it).c_str());
   fprintf(storefile,"\n");
  }
  cout<<"写入成功!"<<endl;
  fclose(storefile);
 }
 void main()
 {
  InputFilter input;
  input.ReadIn();
     input.Transform();
  Shift_Filter ff;
  ff.ReadIn(input);
  ff.Transform();
  Sort_Filter sf;
  sf.ReadIn(ff);
  sf.Transform();
  Store_Filter storef;
  storef.ReadIn(sf);
  storef.Transform();
 }