enumeration data type in c and c++

enumeration data type in c and c++

Nikumbh

Member

Updated: Oct 25, 2024

Views: 1.1K

Can anyone tell about the enumeration data type in c and c++....................................... 😒
i.e., enum

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Ankita Katdare

Administrator • Aug 10, 2011

@Nikumbh: Sure. What do you want to know about it?

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Nikumbh

Member • Aug 10, 2011

AbraKaDabra
@Nikumbh: Sure. What do you want to know about it?
I want to know what is the use of enumeration tag.

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Nikumbh

Member • Aug 10, 2011

I want to know the use of enum data type

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Ankita Katdare

Administrator • Aug 10, 2011
Very well, 'Enum' data type variables takes values which have been previously declared.
With an Enum, you can specify a number of valid values for that variable and descriptive constant names for the values of the Enum. These values are used instead of constants.

In C:

For example:
```
enum month 
{ 
jan=1, feb=2, mar=3, apr=4, may=5, jun=6, jul=7, aug=8, sep=9, oct=10, nov=11, dec=12
};     
enum month this_month;      

this_month = aug;    
```
Here 'month' is declared as the enumerated data type.
It consists of a set of values, jan to dec. Numerically, jan is given the value 1, feb the value 2, and so on.
The variable 'this_month' is declared to be of the same type as 'month'.
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Nikumbh

Member • Aug 14, 2011

Is that necessary to have enum data type....?

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ayusha patnaik

Member • Aug 15, 2011

can any one suggest me a good and easy book for object oriented programming for c++?

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TheV

Member • Aug 15, 2011
I am explain a little more..

When we write a number of related constant with sequencial values like I want to assign names of the color(red,green,yellow,white,black,blue,orange) with 1 to 7 then instead of writing ..

int red=1;
int green =2;
int yellow =3;
........
........
int orange = 7;
we write ....

enum color{
red,green,yellow,white,black,blue,orange
};
here we didnot initialize any color with any number. It is automatically initialize from 0 to 6. But we want to initialize from 1 to 7 so we just initialize
the first color i.e. red to 1 and the remaining automatically initializes from 2 to 7 . As..

enum color{
red=1,green,yellow,white,black,blue,orange
};
Again explaining little more...if we initialize green to 1 ie green =1 then the remaining 5 color will have 2 to 6
eg-
```
#include<stdio.h>
#include<conio.h>
main()
{
enum color{
red=1,green=1,yellow,white,black,blue,orange
};
enum color mycolor = white;
printf("%d",mycolor);
printf("%d%d",red,orange);  //We can also print by their name .
getch();
return;
}
```
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