资料来源 : Free On-Line Dictionary of Computing

enumerated type
     
         (Or "enumeration") A {type} which includes in
        its definition an exhaustive list of possible values for
        variables of that type.  Common examples include {Boolean},
        which takes values from the list [true, false], and
        day-of-week which takes values [Sunday, Monday, Tuesday,
        Wednesday, Thursday, Friday, Saturday].  Enumerated types are
        a feature of {strongly typed languages}, including {C} and
        {Ada}.
     
        Characters, (fixed-size) integers and even {floating-point}
        types could be (but are not usually) considered to be (large)
        enumerated types.
     
        (1996-11-28)