判断点是否在 圆的内部(类与对象)
程序员文章站
2024-03-16 14:34:28
...
#include<iostream>
using namespace std;
class Point
{
public:
void setXY(int x, int y)
{
m_x = x;
m_y = y;
}
int getX()
{
return m_x;
}
int getY()
{
return m_y;
}
private:
int m_x;
int m_y;
};
class Circle
{
public:
void setXY(int x, int y)
{
x0 = x;
y0 = y;
}
void setR(int r)
{
m_r = r;
}
bool judgePoint(Point &p)
{
int dd;
dd = (p.getX() - x0)*(p.getX() - x0) + (p.getY() - y0)*(p.getY() - y0);
if (dd > m_r*m_r)
{
return false;
}
else
{
return true;
}
}
private:
int x0;
int y0;
int m_r;
};
int main()
{
Circle c;
c.setXY(2, 2);
c.setR(2);
Point p;
p.setXY(8, 8);
if (c.judgePoint(p) == true)
{
cout << "圆的内部" << endl;
}
else
{
cout << "圆的外部" << endl;
}
return 0;
}
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