1.何为欧式距离

在欧几里得空间中，点x =(x1,…,xn)和 y =(y1,…,yn)之间的欧氏距离为

2.C++实现计算两点欧氏距离

point1(x1, y1): (1,3)
point2(x2, y2): (2,6)

#include <iostream>
#include <cmath>

using namespace std;


int main()
{
    struct point {
        double x;
        double y;

    };
    point point1 = { 130, 100 };
    point point2 = { 160, 200 };

    double distanceEuclidean = sqrt(pow((point2.x - point1.x), 2) + pow((point2.y - point1.y), 2));

    cout << "{" << point1.x << "," << point1.y << "}" << "和" << "{" << point2.x << "," << point2.y << "}" << "的欧氏距离：" << distanceEuclidean << endl;


}

3.执行演示

4.应用场景

该公式常用在机器学习场景，用于距离计算，如KNN算法等。

5.源码工程下载

https://download.csdn.net/download/qq_34321590/89611231