Re: how to access to enumeration member via it's number

From:

"=?iso-8859-1?q?Erik_Wikstr=F6m?=" <eriwik@student.chalmers.se>

Newsgroups:

comp.lang.c++

Date:

20 Feb 2007 05:42:55 -0800

Message-ID:

<1171978975.686163.297710@m58g2000cwm.googlegroups.com>

On Feb 20, 2:18 pm, brarat...@gmail.com wrote:

Hello,
I have to following issue.
A type is declared based on an enum:
"
enum TpAddressPlan {
        P_ADDRESS_PLAN_NOT_PRESENT = 0,
        P_ADDRESS_PLAN_UNDEFINED = 1,
        P_ADDRESS_PLAN_IP = 2,
        P_ADDRESS_PLAN_MULTICAST = 3,
        P_ADDRESS_PLAN_UNICAST = 4,
        P_ADDRESS_PLAN_E164 = 5,
        P_ADDRESS_PLAN_AESA = 6,
        P_ADDRESS_PLAN_URL = 7,
        P_ADDRESS_PLAN_NSAP = 8,
        P_ADDRESS_PLAN_SMTP = 9,
        P_ADDRESS_PLAN_MSMAIL = 10,
        P_ADDRESS_PLAN_X400 = 11,
        P_ADDRESS_PLAN_SIP = 12,
        P_ADDRESS_PLAN_ANY = 13,
        P_ADDRESS_PLAN_MIN = 14};

typedef enum TpAddressPlan TpAddressPlan;

You don't need a typedef in C++.

And a function receive an integer corresponding to the enumeration
member that I must convert into the member to fill a structure member
of the type TpAddressPlan:
"
this->msg.CEType_u.msgreq.CERequest_u.qryreq.userID.Plan =
AddressPlan; // [0-14]
"

How can I assign to AddressPlan the enumeration value, starting from
it's integer value: kind of

???AddressPlan = TpAddressPlan (i)???

If you are sure that i is in the correct range (0-14) and the value
corresponds to the right enumeration then just use

AddressPlan = TpAddressPlan(i);

--
Erik Wikstr=F6m