#include <iostream>
#include <cstdio>

using namespace std;

void swap(int a, int b) {
  int tmp = a;
  a = b;
  b = tmp;
}

void swap1(int *a, int *b) {
  int tmp = *a;
  *a = *b;
  *b = tmp;
}

void swap2(int &a, int &b) {
  int tmp = a;
  a = b;
  b = tmp;
}

int kvadrat(const int &x = 2) {
  return x * x;
}

inline double kvadrat(const double &x) {
  return x * x;
}

int main() {
  int x(2), z = 1;
  double y = 3.4;

  //bool a = true;
  
  cout << "Hello, world" << endl;
  cout << x << endl;
  cout << y << endl;

  cout << "Unesi x: ";
  cin >> x;
  cout << "Unesi z: ";
  cin >> z;

  cout << "x = " << x << endl;
  cout << "z = " << z << endl;

  swap(x, z);

  cout << "x = " << x << endl;
  cout << "z = " << z << endl;

  swap1(&x, &z);

  cout << "x = " << x << endl;
  cout << "z = " << z << endl;

  swap2(x, z);

  cout << "x = " << x << endl;
  cout << "z = " << z << endl;

  z = kvadrat(x);

  cout << "x = " << x << endl;
  cout << "z = " << z << endl;

  for (int i = 0; i < 10; i++)
    cout << i << endl;

  int *p;
  p = new int[10];

  for (int i = 0; i < 10; i++)
    p[i] = i * i;

  for (int i = 0; i < 10; i++)
    printf("%d\n", p[i]);

  delete p;

  cout << kvadrat(3) << endl;
  cout << kvadrat() << endl;
  cout << kvadrat(5.5) << endl;
  
  return 0;  
}