在C ++中使用直径端点找到圆心
假设我们有两个直径为圆的端点。它们是(x1,y1)和(x2,y2),我们必须找到圆心。因此,如果两个点分别是(-9,3)和(5,-7),则中心位于位置(-2,-2)。
我们知道两点的中点是-
$$(x_{m},y_{m})=\left(\frac{(x_{1}+x_{2})}{2},\frac{(y_{1}+y_{2})}{2}\right)$$
示例
#include<iostream> using namespace std; class point{ public: float x, y; point(float x, float y){ this->x = x; this->y = y; } void display(){ cout << "(" << x << ", " <<y<<")"; } }; point center(point p1, point p2) { int x, y; x = (float)(p1.x + p2.x) / 2; y = (float)(p1.y + p2.y) / 2; point res(x, y); return res; } int main() { point p1(-9.0, 3.0), p2(5.0, -7.0); point res = center(p1, p2); cout << "Center is at: "; res.display(); }
输出结果
Center is at: (-2, -2)