#include<iostream>
#include<string>
using namespace std;
//圆的类
class yuan{
public:int x2 = 10;int y2 = 10;int r = 5;
};
//点的类
class dian{
public :void setx(int x){x1 = x;}int getx(){return x1;}void sety(int y){y1 = y;}int gety(){return y1;}
private:int x1;int y1;
};
//判断方法
void pandian(dian p,yuan s){int t = (((p.getx() - s.x2)*(p.getx() - s.x2)) - ((p.gety() - s.y2)*(p.gety() - s.y2)));if (t> s.r) cout << "在圆外" << endl;else if (t== s.r) cout << "在圆上" << endl;else cout << "在圆内" << endl;
}
int main(){dian p;yuan s;p.setx(100);p.sety(20);pandian(p, s);system("pause");return 0;
}