/*  Program demonstrating the use of an enumerated type */

#include <stdio.h>

/* enumerated type definition */  
typedef enum
   {monday, tuesday, wednesday, thursday, friday, 
    saturday, sunday}
day_t; 

// the first identifier is represented by the integer 0, 
// the second by 1, and so on 

void print_day(day_t day);

int
main(void)
{
      double week_hours = 0.0, day_hours; 
      day_t today;

      printf("The value of monday = %d\n",monday); 
      printf("The value of friday = %d\n",friday); 

      for ( today = monday; today <= friday; ++today){
           printf("Enter hours for "); 
           print_day(today); 
           printf("> ");  
           scanf("%lf",&day_hours); 
           week_hours += day_hours; 
      }  

      printf("\nTotal weekly hours are %.2f\n",week_hours); 

      return (0);
}

/* 
 * Display string corresponding to a value of type weekday
 */
void
print_day(day_t day)
{
      switch (day) {
      case monday:
            printf("monday");
            break;

      case tuesday:
            printf("tuesday");
            break;

      case wednesday:
            printf("wednesday");
            break;

      case thursday:
            printf("thuesday");
            break;
 
      case friday:
            printf("friday");
            break;

      case saturday:
            printf("saturday");
            break;

      case sunday: 
            printf("sunday");
            break;

      default:
            printf("\n*** INVALID DAY CODE ***\n");
      }
}