Calculate the Body Mass Index (BMI) using height and weight

//Creative Commons and Public Domain (use in any way you wish). (CC) Lauri Friberg 27th of June 2018.
//Calculate the Body Mass Index (BMI) using height in meters (m) and weight in kilograms (kg).
//The formula is BMI = weight (kg) / ((height (m))²) = weight(kg) / (height(m)*height(m)).
#include <iostream>
using namespace std;
int main()
{
double BMI = 0, height = 0, weight = 0;
cout << "Calculates the Body Mass Index (BMI) from height (m) and weight (kg).\n";
cout << "Height (meters) = ";   //Output to tell what to input.
cin >> height;                  //Input height in meters (m).
cout << "Weight (kg) = ";       //Output to tell what to input.
cin >> weight;                  //Input weight in kilograms (kg).
BMI = weight / (height * height); //The BMI formula in simple mathematics.
cout << "Body Mass Index = " << BMI << "\n"; //Output the Body Mass Index (BMI).
return 0;
}