How to add , delete value from enum in c++?

Question

2.75/5 (4 votes)

See more:

C++

int faculty = 0;
 enum { prog , econ , sport };

  add fac(  );

  delete fac (  );

If i have class student :

C++

 class Student {
string Name;
string fathername;
string sername;
unsigned int    id-std;
unsigned int    old;

Posted 5-Nov-12 21:21pm

the dark Knight

Add a Solution

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2012-11-05T21:29:00

Solution 1

You cannot modify at runtime a C++ enum.
However you may design a class miming the enum behaviour and supporting the requested features (see, for instance, this CodeProject's article: "Typesafe C++ Enum with ToString() and FromString()"[^].

Posted 5-Nov-12 21:29pm

CPallini

Sergey Alexandrovich Kryukov · Answer 2 · 2012-11-09T12:45:00

Solution 3

The root of the problem is that enum is not an object at all. It does not have values, cannot occupy memory during run time. Not that you cannot add or remove a value, there is just nothing to add or remove. Think of this in the following way: enum does not exist during run time at all: behind the hood, the values of this type are represented as the value of on of integer types. Is it more clear now?

—SA

Posted 9-Nov-12 12:45pm

Sergey Alexandrovich Kryukov

Comments

Mohibur Rashid 9-Nov-12 19:25pm

agreed

Sergey Alexandrovich Kryukov 9-Nov-12 23:28pm

Thank you, Mohibur.
--SA

Barakat S. · Answer 3 · 2012-11-05T23:14:00

enum means 'enumerated type' and it's not supposed to be changed and should be fixed. For example, a studnet is either a male or female, there is no third possibility. It's a good idea to use enum in this case:

C++

enum StudentType {
    STUDENT_TYPE_MALE,
    STUDENT_TYPE_FEMALE,
};

class StudentInfo {
    string name;
    string fathername;
    string surname;
    StudentType type; // Now I know that this variable must be one of the types available in 'StudentType'
    // ...
};

How to add , delete value from enum in c++?

3 solutions

Solution 1

Solution 3

Solution 2

Add your solution here

Preview 0

Existing Members

...or Join us