用外接圆法求圆心和半径c++代码

以下是用外接圆法求圆心和半径的 C++ 代码：

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    double x1, y1, x2, y2, x3, y3;
    cout << "Enter the coordinates of the first point: ";
    cin >> x1 >> y1;
    cout << "Enter the coordinates of the second point: ";
    cin >> x2 >> y2;
    cout << "Enter the coordinates of the third point: ";
    cin >> x3 >> y3;

    // Calculate the slope of the line connecting points (x1, y1) and (x2, y2)
    double slope1 = (y2 - y1) / (x2 - x1);
    // Calculate the slope of the line connecting points (x2, y2) and (x3, y3)
    double slope2 = (y3 - y2) / (x3 - x2);
    // Calculate the x-coordinate of the center of the circle
    double centerX = ((slope1 * slope2 * (y1 - y3)) + (slope2 * (x1 + x2)) - (slope1 * (x2 + x3))) / (2 * (slope2 - slope1));
    // Calculate the y-coordinate of the center of the circle
    double centerY = ((-1 / slope1) * (centerX - ((x1 + x2) / 2))) + ((y1 + y2) / 2);
    // Calculate the radius of the circle
    double radius = sqrt(pow((centerX - x1), 2) + pow((centerY - y1), 2));

    cout << "The center of the circle is (" << centerX << ", " << centerY << ") and the radius is " << radius << endl;

    return 0;
}

该代码通过用户输入三个点的坐标，计算出圆的圆心和半径，并输出结果。