> if an enumerated type has been declared(say over a range of 1 to 7)
 > and i wanted to input data for that type in a 2-d matrix.

 >  for example, over a range of Days of the Week.
 >   if i declared
 >       for (days=Sunday;days<=Saturday;days++)
~
 >   i believe standard C lets u do this BUT C++ does not.

You came from Pascal - right? :-)

Enumations in C++ are not based on Wirth's "sets" concept, and
therefore incrementing or decrementing them has no meaning. They are
actually handled as disrete values. In fact even in C there's little
difference between an enumation and a plain old #define - there's no
internal control over sets which aren't integral and not exactly 1 apart.
For example, if you had an enumerator such as:

enum xyz
{
    smallval    = 1,
    largerval   = 2,
    largestval  = 4
};

Then 'incrementing' a variable of type enum xyz will still increment by 1,
even though there's no meaningful definition corresponding with the value
3.


 >   how can one do this in C++??

In C++, the rules are merely more strict, and the language does not let you
handle enumerations arithmetically (and an increment, is an arithmetic
operation). This is intended to ensure that you cannot have an initialised
variable of an enumulated type set to any value except one which is valid.

You can, however, "get around" this by using type int, ie.

    for ( int days=Sunday ; days <= Saturday ; days++ )

Note that 'days' is type int (might be any integral type, provided it is
large enough to hold all possible values of the enumator), and not the
enumeration type.

  Hope this helps,
  David

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