cout << timeval

1. Consider the struct ut_tv which we got in the exercise of Login/Logout exercise.
2. Suppose we have a class

   class Ctimeval {
   public:
       Ctimeval(int32_t sec = 0, int32_t usec = 0) {
           tv_sec  = sec;
           tv_usec = usec;
       }
   
   private:
       int32_t tv_sec;           /* Seconds */
       int32_t tv_usec;          /* Microseconds */
   };

3. Define a friend function operator<<() to print out the time value in the format like "Wed Mar 30 20:14:37 2022".
   • You may want to re-use the ctime(3) function.
4. You may test your code with the following main program:

   int main()
   {
       Ctimeval t1(1645633307, 622206);
       Ctimeval t2(time(NULL));
       cout << t1 << t2;
       return 0;
   }