### Examples of Eumerator Declaration and Use

The following data type declarations list `oats`, `wheat`, `barley`, `corn`, and `rice` as enumeration constants. The number under each constant shows the integer value.

>     enum grain { oats, wheat, barley, corn, rice };
>        /*         0      1      2      3     4         */

>     enum grain { oats=1, wheat, barley, corn, rice };
>        /*         1        2      3      4     5       */

>     enum grain { oats, wheat=10, barley, corn=20, rice };
>        /*          0     10        11     20       21  */

It is possible to associate the same integer with two different enumeration constants. For example, the following definition is valid. The identifiers `suspend` and `hold` have the same integer value.

>     enum status { run, clear=5, suspend, resume, hold=6 };
>        /*          0      5        6       7       6       */

The following example is a different declaration of the enumeration tag `status`:

>     enum status { run, create, clear=5, suspend };
>        /*          0     1        5       6             */

The following program receives an integer as input. The output is a sentence that gives the French name for the weekday that is associated with the integer. If the integer is not associated with a weekday, the program prints `"C'est le mauvais jour."`

>     ** Example program using enumerations
>      **/

>     #include <stdio.h>

>     enum days {
>                 Monday=1, Tuesday, Wednesday,
>                 Thursday, Friday, Saturday, Sunday
>               } weekday;

>     void french(enum days);

>     int main(void)
>     {
>        int num;

>        printf("Enter an integer for the day of the week.  "
>               "Mon=1,...,Sun=7\n");
>        scanf("%d", &num);
>        weekday=num;
>        french(weekday);
>        return(0);
>     }

>     void french(enum days weekday)
>     {
>        switch (weekday)
>        {
>           case Monday:
>              printf("Le jour de la semaine est lundi.\n");
>              break;
>           case Tuesday:
>              printf("Le jour de la semaine est mardi.\n");
>              break;
>           case Wednesday:
>              printf("Le jour de la semaine est mercredi.\n");
>              break;
>           case Thursday:
>              printf("Le jour de la semaine est jeudi.\n");
>              break;
>           case Friday:
>              printf("Le jour de la semaine est vendredi.\n");
>              break;
>           case Saturday:
>              printf("Le jour de la semaine est samedi.\n");
>              break;
>           case Sunday:
>              printf("Le jour de la semaine est dimanche.\n");
>              break;
>           default:
>              printf("C'est le mauvais jour.\n");
>        }
>     }

enum Data Type