point.h

来自「it is a usefull thing」· C头文件 代码 · 共 30 行

//=====================================
// point.h
//=====================================
#ifndef HEADER_POINT
#define HEADER_POINT
//-------------------------------------
#include<iostream>
using namespace std;
//-------------------------------------
class Point{
protected:
  double x, y;
public:
  static double PI;
public:
  Point(double a=0, double b=0);
  double xOffset()const;
  double yOffset()const;
  double angle()const;
  double radius()const;
  Point operator+(const Point& d)const;
  Point& operator+=(const Point& d);
  void moveTo(double a, double b);
friend inline ostream& operator<<(ostream& o, const Point& d){
    return o<<'('<<d.x<<','<<d.y<<')'<<'\n';
}
};//===================================
#endif  // HEADER_POINT