#include <iostream>
using namespace std;

const int SIZE = 100;
double A[SIZE];

double get(int i) {
  return A[i];
}

void set(int i, double v) {
  A[i] = v;
}

double & element(int i) {
  return A[i];
}

// ------------------------

int main() {
  cout << get(3) << endl;
  set(3, 8.5);
  cout << get(3) << endl;

  cout << endl;
  cout << element(3) << endl;

  element(3) = 3.2;

  cout << element(3) << endl;
}