How to check if enum value is valid?

Question

I am reading an enum value from a binary file and would like to check if the value is really part of the enum values. How can I do it?

Answer 1

Maybe use enum like this:

enum MyEnum
{
A,
B,
C
};

and to check

if (v2 >= A && v2 <= C)

If you don't specify values for enum constants, the values start at zero and increase by one with each move down the list. For example, given enum MyEnumType { ALPHA, BETA, GAMMA }; ALPHA has a value of 0, BETA has a value of 1, and GAMMA has a value of 2.