#include <iostream>

int main()

{

int n, op;

std::cout << "Enter the number of conductors" << std::endl;

std::cin >> n;

std::cout << "Enter operation (1 for serial or 2 for parallel)" << std::endl;

std::cin >> op;

double R = 0.0;

switch (op)

{

case 1:

{

 for (int i = 0; i < n; ++i)

 {

  std::cout << "Enter the resistance of a " << i + 1 << " conductor" << std::endl;

  double temp;

  std::cin >> temp;

  R += temp;

 }

 break;

}

case 2:

{

 for (int i = 0; i < n; ++i)

 {

  std::cout << "Enter the resistance of a " << i + 1 << " conductor" << std::endl;

  double temp;

  std::cin >> temp;

  R += 1 / temp;

 }

 R = 1 / R;

 break;

}

default:

 std::cout << "Unknown operation!" << std::endl;

 break;

}

std::cout << "R == " << R << std::endl;

system("pause");

return 0;

}