#include <iostream>
#include <cmath>
using namespace std;

float norm(float* v, int dimension) 
{
	float tmp=0;
	for (int i=0; i<dimension; i++) {
		tmp+=*v * *v;
		v++;
	}
	return sqrt(tmp);
}

int main() 
{
	float vektor[]={1,2,3};
	float n=norm(vektor,3);
	cout << "Die Norm des Vektors (" << vektor[0] << " "
		<< vektor[1] << " " << vektor[2] << ") ist "
		<< n << endl;
	return 0;
}