enum in C++

Hi,

Can oneone explain clearly what the c++ enum data type below:

enum {OFF = 1, ON = 2, RUN = 4, SHUTDOWN = 5};

With no name tag, what the the code mean?I have'nt seen like
this kind of data define before!
Thanx!
Sunset

Hi,

If you are planning to use just constants and not create variables of the enumerated type, you can omit the an enumeration type name.

Mr. C

Enum makes it easier to understand your code. Instead of typing this:

Code:

---

int WalkingDirection;
WalkingDirection = GetPressedKeyDirection();

switch(WalkingDirection)
{
  case 0:
    Xpos++;
    break;
  case 1:
    Xpos--;
    break;
  case 2:
    Ypos++;
    break;
  case 3:
    Ypos--;
    break;
}

---

You should make an enum like this:

Code:

---

typedef enum
{
  RIGHT,
  LEFT,
  UP,
  DOWN
}DIRECTION;


DIRECTION WalkingDirection;
WalkingDirection = GetPressedKeyDirection();

switch(WalkingDirection)
{
  case RIGHT:
    Xpos++;
    break;
  case LEFT:
    Xpos--;
    break;
  case DOWN:
    Ypos++;
    break;
  case UP:
    Ypos--;
    break;
}

---

It makes the code sooo much easier to read/understand.

Or like this:

Code:

---

enum DIRECTION
{
  RIGHT,
  LEFT,
  UP,
  DOWN
};

---