/*
  Working with boolean logic.
  See Nyhoff P111-116.
  
  ==, !=, < , >, <=, >=  are relational operators for integers and doubles that produce boolean expressions.
  
  && , || , !   are logical operators for boolean variables. Do not confuse these with bitwize operations!
  
  && (and) has higher precedence than || (or), just like * has higher precedence than +.
  
  1) What is numbers are printed out at WTF?
  
  2) Run the program with some numbers to check if it works.
  
*/

#include <iostream>
using namespace std;

int main()
{
   int number=42;

   bool isEven     =  number%2==0;                
   bool isNegative =  number<0;
   bool isZero     =  number==0;
   bool isnonZero  =  number!=0;
                         
   if (isEven)     cout << number << " is even" << endl;
   if (isNegative) cout << number << " is negative" << endl;

   if (isEven && isNegative) cout << number << " is even AND negative" << endl;
   if (isEven || isNegative) cout << number << " is even OR negative" << endl;
   if (!isNegative)          cout << number << " is NOT negative i.e. it is positive" << endl;

// WTF
   if (isEven && !isNegative || isZero) cout << number << " is < ??? >" << endl; 
    
   return 0;
}