2023.4.16

#include <iostream>
using namespace std;
//设计圆类和点类，判断点和圆的关系
class Point
{
public:
    void setX(int x)
    {
        m_X = x;
    }
    int getX()
    {
        return m_X;
    }
    void setY(int y)
    {
        m_Y = y;
    }
    int getY()
    {
        return m_Y;
    }
private:
    int m_X;
    int m_Y;
};
class Circle
{
public:
    void setR(int r)
    {
        m_R = r;
    }
    int getR()
    {
        return m_R;
    }
    void setCenter(Point center)
    {
        m_Center = center;
    }
    Point getCenter()
    {
        return m_Center;
    }
private:
    int m_R;
    Point m_Center;
};
void isInCircle(Circle &c,Point &p)
{
    int a = c.getR()*c.getR();
    int b = (p.getX()-c.getCenter().getX())*(p.getX()-c.getCenter().getX())+(p.getY()-c.getCenter().getY())*(p.getY()-c.getCenter().getY());
    if(a == b)
    {
        cout<<"点在圆上"<<endl;
    }
    else if(a > b)
    {
        cout<<"点在圆内"<<endl;
    }
    else if(a < b)
    {
        cout<<"点在圆外"<<endl;
    }
}
int main()
{
    Point p;
    p.setX(1);
    p.setY(1);
    Point pr;
    pr.setX(1);
    pr.setY(1);
    Circle c;
    c.setCenter(pr);
    c.setR(1);
    isInCircle(c,p);
    return 0;
}