#include <iostream>
#include <cctype>
#include <cstdlib>

using namespace std;

/* lsjdfkjls */
// slkdjflksdjf

void swap(int x, int y) {
  int tmp = x;
  x = y;
  y = tmp;
}

void swap1(int *x, int *y) {
  int tmp = *x;
  *x = *y;
  *y = tmp;
}

void swap2(int &x, int &y) {
  int tmp = x;
  x = y;
  y = tmp;
}

int kvadrat(const int &x) {
  return x * x;
}

int f(int x = 111) {
  return x + 1;
}

inline double f(double y) {
  return y + 2;
}

int main() {
  int n(3);
  int *niz;

  cout << "Hello, world" << endl;
  cout << "Dimenzija niza: ";

  cin >> n;

  niz = new int[n];

  for (int i = 0; i < n; i++)
    niz[i] = i * i;

  for (int i = 0; i < n; i++)
    cout << niz[i] << endl;

  delete niz;

  int x = 1, y = 2;
  cout << "x = " << x << endl;
  cout << "y = " << y << endl;
  swap(x, y);
  cout << "x = " << x << endl;
  cout << "y = " << y << endl;
  swap1(&x, &y);
  cout << "x = " << x << endl;
  cout << "y = " << y << endl;
  swap2(x, y);
  cout << "x = " << x << endl;
  cout << "y = " << y << endl;

  x = 10;
  cout << "x ^ 2 = " << kvadrat(x) << endl;

  const int d = 10;
  cout << "d ^ 2 = " << kvadrat(d) << endl;

  cout << "f(x) = " << f(x) << endl;
  cout << "f() = " << f() << endl;
  
  double r = 2.3;
  cout << "f(r) = " << f(r) << endl;

  cout << "isdigit('7') = " << isdigit('7') << endl;
  cout << "isdigit('a') = " << isdigit('a') << endl;

  exit(EXIT_SUCCESS);
}