Assignment 9:  Written Problems

File:           answers9.txt
Assignment:	9
Author:         {your name} <{your e-mail address}>


Edit your answers to the following question into this
file.

Suppose you are given the task of adding a vector data
type to the LISP interpreter.  As part of this you must
write the vector.h file containing, among other things,
a definition of the vector class.

A vector is just a C++ vector of `object *' values.  A
vector object also has a length that is >= 0 and tells
the number of elements in the vector.  make_vector takes
the length as an argument and creates a vector all of
whose elements equal NIL.

After looking at cons.h, fixnum.h, and symbol.h for
guidance, complete the definition of the vector class
below.  You may also wish to look at the description of
the real-life COMMONLISP array data type in the Graham
textbook, section 4.1.  The vectors we are interested
in are what COMMONLISP calls `simple vectors'.

You have a fair amount of freedom of expression, as long
as your declarations are sensible.  You need not include
any function body code, only declarations and comments.



class vector : public object
{

public:
    // ...
    // Declare constructor, destructor, member
    // functions, member operators (if any), friends
    // (if any) here.
    // ...

private:
    // ...
    // Declare data members here.
    // ...

};