#include <iostream>
#include <cmath>

double calculateEuclideanDistance(double x1, double y1, double x2, double y2) {
    return sqrt(pow(fabs(x2 - x1), 2) + pow(fabs(y2 - y1), 2));
}

int main() {
    double x1 = 1.5, y1 = 3.5;
    double x2 = 4.5, y2 = 1.5;

    double distance = calculateEuclideanDistance(x1, y1, x2, y2);

    std::cout << "فاصله اقلیدسی بین دو نقطه برابر است با: " << distance << std::endl;

    return 0;
}