I want to define my own datatype that can hold a single one of six possible values in order to learn more about memory management in c++. In numbers, I want to be able to hold 0 through 5. Binary, It would suffice with three bits (101=5), although some (6 and 7) wont be used. The datatype should also consume as little memory as possible.

Im not sure on how to accomplish this. First, I tried an enum with defined values for all the fields. As far as I know, the values are in hex there, so one "hexbit" should allow me to store 0 through 15. But comparing it to a char (with sizeof) it stated that its 4 times the size of a char, and a char holds 0 through 255 if Im not misstaken.

```
#include <iostream>

enum Foo
{
    a = 0x0, 
    b = 0x1,
    c = 0x2,
    d = 0x3,
    e = 0x4,
    f = 0x5,
};

int main()
{
    Foo myfoo = a;
    char mychar = 'a';

    std::cout << sizeof(myfoo); // prints 4
    std::cout << sizeof(mychar); // prints 1

    return 1;
}

```

Ive clearly misunderstood something, but fail to see what, so I turn to SO. :)

Also, when writing this post I realised that I clearly lack some parts of the vocabulary. Ive made this post a community wiki, please edit it so I can learn the correct words for everything.