Enumerators in C

Enumeration is a user defined datatype in C language. It is used to assign names to integral constants which makes a program easy to read and maintain.

The keyword "enum" is used to declare an enumeration.

Syntax: enum enum_name {const1, const2,…....constn};

By default, const1 is 0, const2 is 1 and so on. You can change default values of enum elements during declaration.

Example: enum  fruits{apple,mango,orange,grapes};

Example1. An example program to demonstrate working

#include <stdio.h> enum week {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}; void main() { enum week today; today=Wednesday; printf("The value of today is %d", today + 1); }

Example2. Enum in switch statement

#include <stdio.h> enum days{sunday=1, monday, tuesday, wednesday, thursday, friday, saturday}; void main() { enum days d; d=monday; switch(d) { case sunday: printf("Today is sunday"); break; case monday: printf("Today is monday"); break; case tuesday: printf("Today is tuesday"); break; case wednesday: printf("Today is wednesday"); break; case thursday: printf("Today is thursday"); break; case friday: printf("Today is friday"); break; case saturday: printf("Today is saturday"); break; } }

Example3. Enum with loop

#include<stdio.h> enum year{Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec}; int main() { int i; for (i=Jan; i<=Dec; i++) printf("%d ", i); return 0; }