////////////////////////////////////////////////////////////
//  operator.cpp - how do I use the predefined operators? //
////////////////////////////////////////////////////////////
#include <iostream>
#include <iomanip>
using namespace std;

// The predefined operators are a part of the language so
// you don't need to include any libraries to use them.

void main() {


// the 2nd and 3rd statements below use two operators, 
// assignment "=" and times "*"
  int x;
  int y = 3;
  x = 2*(7-y);
  cout << "\n  if y = 3, then x = 2*(7-y) = " << x << "\n";

// the statements below use the subscripting operators []
  double a[3] = { 0.5, -2.333, 8.2e+3 };
  cout << "\n  a[] contains: ";
  cout << setw(8) << a[0] 
       << setw(8) << a[1] 
       << setw(8) << a[2] << "\n";

// the statement below uses assignment "=" and less "<" operators
  bool pred = (2 < 3);
  cout.setf(ios::boolalpha);
  cout << "\n  the statement 2 < 3 is " << pred << "\n\n";
}