// Code derived from Stroustrup's PPP2 book
// § 4.3.2 Operators
// -beginning on p 98

#include <iostream>

using std::cout;

int main()
{
  int a = 10;
  cout << a << '\n';

  ++a;
  cout << a << '\n';

  a += 1;
  cout << a << '\n';

  a = a + 1;
  cout << a << '\n';
}