lm_plusplus

Imitate C syntax r++ (return and increment)

CALL:

    	r=lm_plusplus(r) (return and store value r)                                       
    	r=lm_plusplus()                                                                   
                                                                                    

INPUT:

      value
          Optional argument (scalar)
          If specified, current will return this value. A subsequent call
          without arguments to this utility will return r+1

OUTPUT: