add to enum items

[technologist]

enum Ship
{
SHIP_BATTLESHIP,
SHIP_AIRCRAFT_CARRIER,
SHIP_CARGO_SHIP,
SHIP_DESTROYER,
SHIP_BARGE,
SHIP_TUGBOAT,
};

How do I add SHIP_TITANIC to the list? I have tried static cast and it doesnt work/am not doing it right:

[ResidentBiscuit]

enum Ship
{
  SHIP_BATTLESHIP,
  SHIP_AIRCRAFT_CARRIER,
  SHIP_CARGO_SHIP,
  SHIP_DESTROYER,
  SHIP_BARGE,
  SHIP_TUGBOAT,
  SHIP_TITANIC
};

You can't change enums at runtime. Are you looking for a container of sorts?

[technologist]

Not quite. Let me restate the question.

Here is an enum list:

enum Color
{
COLOR_BLACK, // assigned 0
COLOR_RED, // assigned 1
COLOR_BLUE, // assigned 2
COLOR_GREEN, // assigned 3
COLOR_WHITE, // assigned 4
COLOR_CYAN, // assigned 5
COLOR_YELLOW, // assigned 6
COLOR_MAGENTA // assigned 7
};

Color color = static_cast<Color>(5); // ugly

What does this statement do? 5 of what? What equals 5?

[xismn]

What does this statement do? 5 of what? What equals 5?

Color color = COLOR_CYAN;

[technologist]

Color color = COLOR_CYAN;

but we already knew that from our list right?

[MikeyBoy]

Um... no. Your so-called "list" doesn't say anything about a variable called color.

Your enum statement is defining a type called Color.

This:

Color color = static_cast<Color>(5); // ugly

declares a variable called color of that type, and initialises its value to COLOR_CYAN.

This:

Color color = COLOR_CYAN;

does exactly the same thing.

EDIT: A little part of me dies inside every time I have to use the American spelling of "colour" :P

[technologist]

Oh. Got it. : ) Thx

[technologist]

enum SHIPS
{
	SHIP_BATTLESHIP = -5,
	SHIP_AIRCRAFT_CARRIER,
	SHIP_CARGO_SHIP = 100,
	SHIP_DESTROYER,
	SHIP_BARGE,
	SHIP_TUGBOAT
};
...
int inputShip;
	cin >> inputShip;
	ship = static_cast<SHIPS>(inputShip);
	cout<<ship;
	SHIP_BATTLESHIP = ship;
	return 0;

error code:\src\main.cpp:48:18: error: lvalue required as left operand of assignment

I thought I handled it correctly (assigning a user nput to be assigned to an enumerated type)

[MiiNiPaa]

SHIP_BATTLESHIP = ship; What are you trying to do here? This statment is equivalent to -5 = ship;

[technologist]

SHIP_BATTLESHIP = ship;

changed to this:

SHIPS SHIP_BATTLESHIP = ship

I am trying to allow the user to input and change the enum value.

[MikeyBoy]

You can't do that. That's like asking the user to enter a new value for the number "-5".

In your enum definition, you're telling the compiler that the symbol SHIP_BATTLESHIP means "-5". You can't change that at runtime.

Why would you even want the user to be able to change that value? What purpose would it serve?

[technologist]

You can't change that at runtime.

Thank you now it makes sense to me. I was trying to write a run time routine; I didn't know that you couldn't.

Why would you even want the user to be able to change that value? What purpose would it serve?

It wouldn't -- I have a better handle on this subject matter now even though I was trying to achieve the impossible. : )