? :                      Condition operator (ternary)

 exp ? e1 : e2           Ternary conditional operator
 exp                     any expression
 e1, e2                  any expression

    The ?  :  operator evaluates either expression e1 or e2, depending upon
    the truth of exp.  If exp yields a TRUE value, e1 is evaluated and that
    is the  value returned;  otherwise, e2  is evaluated,  and that  is the
    value returned.

           k = (i > j) ? i : j;   /* This is equivalent to:  k = max(i,j) */