#include <iostream>
#include <string>
#include <vector>
#define Reset(x) x = 0
#define Write(x) std::cout << x << std::endl;
#define Read(x) std::cin >> x;

class Vector
{
public:
	static double Module(std::vector<int> v)
	{
		double S = 0;
		for(int i = 0; i <= v.size() - 1; i++)
		{
			S += (v[i]) ^ 2;
		}
		return S;
	}
};

void PrintVector(std::vector<int> v)
{
	std::string str = "";
	for (int i = 0; i < v.size(); i++)
	{
		std::cout << v.at(i) << " ";
	}
}

int main()
{
	int vect1 = 0,
		vect2 = 0,
		input = 0;
	std::vector<int> vectors[3];

	vectors[0] = { 1, 2, 3 };
	vectors[1] = { 3 ,2 ,1 };
	vectors[2] = { 1, 2, 3, 4 };

	std::cout << "1 vector: { 1 , 2, 3 }" << std::endl;
	std::cout << "2 vector: { 3 , 2, 1 }" << std::endl;
	std::cout << "3 vector: { 1, 2, 3, 4 }" << std::endl;

	std::cout << "Choose an operation: \n";
	Read(input);

	switch(input)
	{
	case 1:	//Module
		Write("Choose a vector: ");
		Read(vect1);
		Write(Vector::Module(vectors[vect1 - 1]));
		break;
	}

	system("pause");
}