C++分文件编写：拆类（.h和.cpp文件）

#include<iostream>
using namespace std;
class Point {
public:
  int getx() {
    return m_x;
  }
  void setx(int x) {
    m_x = x;
  }
  int gety() {
    return m_y;
  }
  void sety(int y) {
    m_y = y;
  }
private:
  int m_x;
  int m_y;
};
class Circle {
public:
  Point get_center() {
    return m_center;
  }
  void set_center(Point center) {
    m_center = center;
  }
  int get_r(){
    return m_r;
  }
  void set_r(int x) {
    m_r = x;
  }
private:
  int m_r;
  Point m_center;
};
void ispic(Circle& c, Point a) {
  int R = c.get_r() * c.get_r();
  int distance = (c.get_center().getx() - a.getx()) * (c.get_center().getx() - a.getx()) + (c.get_center().gety() - a.gety()) * (c.get_center().gety() - a.gety());
  if (R > distance ){
    cout << "点在圆内" << endl;
  }else {
  if (R = distance){
    cout << "点在圆上" << endl;
  }else {
    cout << "点在圆外" << endl;
  }}
}
int main() {
  Point a;
  a.setx(2);
  a.sety(0);
  Circle c;
  Point c1;
  c1.setx(1);
  c1.sety(0);
  c.set_center(c1);
  c.set_r(1);
  //圆心：（1，0），半径：1 ；点：（2，0）
  ispic(c, a);
  system("pause");
  return 0;