record.h

这是本人精心搜集的关于常用图论算法的一套源码

#include "Str.h"
class Record
{ friend bool operator==(const Record &x, const Record &y) {return x.key==y.key; }
  friend bool operator<(const Record &x, const Record &y) { return x.key<y.key; }
  friend bool operator>(const Record &x, const Record &y) { return x.key>y.key; }
  friend bool operator>=(const Record &x, const Record &y) { return x.key>=y.key; }
  friend bool operator<=(const Record &x, const Record &y) { return x.key<=y.key; }
  friend bool operator!=(const Record &x, const Record &y) { return x.key!=y.key; }
  friend istream &operator>>(istream&in,Record& x)
    {  in>>x.key;   return in;  }
 public:
  Record():key(0){}
  Record(String k):key(k){}
  Record(const Record& copy)
   { key=copy.key;  other=copy.other; }
  Record& operator=(const Record& copy)
   { key=copy.key;  other=copy.other; return *this; }
  Record& operator=(const char *x){ key=x; }
  String GetKey(){  return key;  } 
  int length(){return strlen(key); }
  private:
    String key;
    char *other;
};