#include<iostream> 
#include<time.h> 
using namespace std;


void DisplayHelloWorld()
{
	cout << "Hello World" << endl;
}

double AbsoluteValue(double n)
{
	double result = n;

	if(result < 0)
	{
		result *= -1;
	}

	return result;
}

//n is the function parameter
double squareRoot(double n)
{
	double result = 0;
	double s = 2;

	result = (n/s + s)/2;

	while(AbsoluteValue(result-s) >= .001)
	{
		s = result;
		result = (n/s + s)/2;
	}

	return result;
}



void main()
{
	//what are functions and why do we use them
	//reuse - avoid duplicate code
	//reduce complexity

	//void & non-void
	//int r = rand();
	//cout.precision(3);

	///DisplayHelloWorld();

	for(int i = 0; i < 1000 ; i++)
	{
		cout << squareRoot(i) << endl;
	}
}