C-Code

#include <iostream>
#include <math.h>

using namespace std;

// prototypen
double hypotenuse(double ankathete, double gegenkathete);

int main()
{
	double x1 = 0.0, y1 = 0.0, x2 = 0.0, y2 = 0.0;
	cout << "Punkt 1:" << endl;
	cout << "x-position: ";
	cin >> x1;
	cout << "y-position: ";
	cin >> y1;

	cout << "Punkt 2:" << endl;
	cout << "x-position: ";
	cin >> x2;
	cout << "y-position: ";
	cin >> y2;

	cout << hypotenuse(x2 - x1, y2 - y1) << endl;


	system("pause");
	return 0;
}

double hypotenuse(double ankathete, double gegenkathete)
{
	
	return (sqrt(ankathete * ankathete + gegenkathete * gegenkathete));
}