point.cpp

这是本人精心搜集的关于常用图论算法的一套源码

#include <iostream.h>
#include "Point.h"
Point Point::operator=(const Point& obj)
{ x=obj.x, y=obj.y;  
  return *this;  
}

Point Point::operator+=(const Point &p)
{ x += p.x;  y += p.y;
  return *this;
}

ostream& operator<<(ostream& strm, Point& p) 
{  return strm<<"("<<p.x<<","<<p.y<< ") ";  }

int Point::operator<(Point p)
{ return(x*x+y*y)-(p.x*p.x+p.y*p.y); }
void main()
{ Point p(6,3),q(2,5),r(-2,-2);
  p+=q;
  cout<<"p="<<p<<endl;
  cout<<"q="<<q<<endl;
  int c=(q<r);
  if(c<0)cout<<"q is even close to origin\n";
   else if(c>0)cout<<"r is even close to origin\n";
   else cout<<"r and q is equil to origin\n";
}