Figure 7.4  Enumerated Type for Budget Expenses
/*  Program demonstrating the use of an enumerated type */

#include <stdio.h>

typedef enum
      {entertainment, rent, utilities, food, clothing, 
       automobile, insurance, miscellaneous}
expense_t;

void print_expense(expense_t expense_kind);

int
main(void)
{
      expense_t expense_kind;

      scanf("%d", &expense_kind);
      printf("Expense code represents ");
      print_expense(expense_kind);
      printf(".\n");

      return (0);
}

/* 
 * Display string corresponding to a value of type expense_t
 */
void
print_expense(expense_t expense_kind)
{
      switch (expense_kind) {
      case entertainment:
            printf("entertainment");
            break;

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

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

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

      case clothing:
            printf("clothing");
            break;
 
      case automobile:
            printf("automobile");
            break;

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

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

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