#include <iostream>

using namespace std;

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;
}

inline int kvadrat(const int &x = 0) {
  return x * x;
}

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




int main() {
  int x = 3;
  float f = 2.1;

  x = 3 * 1 + 21;
  
  /* sljdflkjds f
     lsjdflsjdl
  */
  cout << "Hello, world" << endl;
  cout << "x = " << x << endl;

  cout << "Unesi f: ";
  cin >> f;
  cout << "f = " << f << endl;
			 
  int y = 1, z = 4;
  int w(2);

  int *niz = new int[10];
  for (int i = 0; i < 10; i++)
    niz[i] = i * i;
  for (int i = 0; i < 10; i++)
    cout << niz[i] << endl;
  delete [] niz;

  
  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;

  const int jedan = 1;
  cout << kvadrat(jedan) << endl;
  cout << kvadrat() << endl;

  cout << kvadrat(2.2f) << endl;
  
  return 0;
}