使用友元函数计算两点间的距离。#include <iostream>#include <cmath>Using namespace std;Class Point {Public:_____________________________Int getX() { return x; }Int getY() { return y; }Friend float dist( _____________________){Double x = p1.x - p2.x;Double y = p1.y - p2.y;Return sqrt(x * x + y * y);}Private:Int x, y;};Int main() {Point myp1(1, 1), myp2(4, 5);Cout << "The distance is: ";Cout << _______________________<< endl;Return 0;}