The mathematical operation max(x,y,w,z) can be represented by using the conditional expression operator, as in: max = (x > y && x > z && x > w) ? x : ((y > z && y > w) ? y : ((z > w) ? z : w));

      Write a corresponding if else statement that is equivalent to the statement above
      that will set max to the largest value of x, y, w, or z. 

3b) Conversely, use a conditional expression operator to rewrite the statement below:
 
             if (x > 0) 
                sign = 1; 
             else if (x == 0) 
                sign = 0; 
             else 
                sign = -1;