/*----------------------------------------------------------------------*/
/*                                                                      */
/* HOMEWORK:    8 - Chapter 11                                          */
/*                                                                      */
/* Name:        Mike Chappell                                           */
/*                                                                      */
/* Class:       C Programming, Cybercourse, Fall 2006                   */
/*                                                                      */
/* Date:        11/29/06                                                */
/*                                                                      */
/* Description: Program which determines gross Pay, calculates          */
/*              overtime and outputs a formated answer for              */
/*              multiple data sets using arrays, functions, structures, */
/*              strings and pointers.                                   */
/*                                                                      */
/*----------------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

	/* Define  Symbolic  Constants*/
#define EMP_NUM 5	/* Define the number of employees*/
#define OT_RATE 1.5	/*Define Overtime Rate as 1.5 */
#define FULL_TIME 40.0	/* Define Full Time as 40 */

	/* Define stuctures */
struct employee
{
   char            name[20];	/* Employee Name */
   long            id_number;	/* Clock Number */
   float           wage;	/* Wage Rate */
   float           hours;	/* Hours */
   float           overtime;	/* Overtime Hours */
   float           gross;	/* Gross Pay */
   struct employee *next;
};

/*----------------------------------------------------------------------*/
/* 									*/
/* 			Function: print_list 			        */
/* 									*/
/* Purpose:	This function will print the contents of a linked 	*/
/* 		list. It will traverse the list from beginning to the 	*/
/* 		end, printing the contents at each node. 		*/
/* 									*/
/* Parameters: 	emp1 - pointer to a linked list 			*/
/* 									*/
/* Outputs: 	None 							*/
/* 									*/
/* Calls: 	None 					        	*/
/* 									*/
/*----------------------------------------------------------------------*/

void            print_list(emp1)
   struct employee *emp1;
{
   struct employee *tmp;	/* tmp pointer value to current node */
   int             i = 0;	/* counts the nodes printed */
   /* Start a beginning of list and print out each value */
   /* loop until tmp points to null (remember null is 0 or false) */
   for (tmp = emp1; tmp; tmp = tmp->next)
   {
          ++i;
	  printf("Employee ID: %6d Wage: %8.2f Hours %8.2f\n", tmp->id_number,
			 tmp->wage, tmp->hours);
   }
   printf("\n\nTotal Number of Employees = %i\n", i);
}

/*----------------------------------------------------------------------*/
/*                                                                      */
/* 			Function: main                                  */
/*                                                                      */
/* Purpose:	This function will prompt the user for an employee      */
/*              id and wage until the user indicates they are finished. */
/*              At that point, a list of id and wages will be           */
/*              generated.                                              */
/*                                                                      */
/* Parameters:  None                                                    */
/*                                                                      */
/* Outputs:     None                                                    */
/*                                                                      */
/* Calls:       print_list                                              */
/*                                                                      */
/*----------------------------------------------------------------------*/

int             main()
{
   struct employee emp1 [5]={
   {"Connie Cobol",98401, 10.60},
   {"Mary Apl",526488, 9.75},
   {"Frank Fortran",765349, 10.50},
   {"Jeff Ada",34645, 12.25},
   {"Anton Pascal",127615, 8.35} 
}; /*This ends the structure */

   char answer[80];
   int more_data = 1;
   char value;

   struct employee *current_ptr,	/* pointer to current node */
                  *head_ptr;	/* pointer to first node */

   /* Set up storage for first node */
   current_ptr = (struct employee *) malloc(sizeof(struct employee));

   head_ptr = current_ptr;
   while (more_data)
   {
	  /* prompt user to enter the employee's name, ID#, and wage */
	  printf("\n");
	  printf("Please enter the employee's name: ");
	  scanf("\n");
	  gets(current_ptr->name);
	  printf("\nPlease enter %s's id number: ", current_ptr->name);
	  scanf("%ld", &current_ptr->id_number);
	  printf("\nPlease enter %s's wage: ", current_ptr->name);
	  scanf("%f", &current_ptr->wage);
	  printf("\nPlease enter the number of hours %s worked: ",
			 current_ptr->name);
	  scanf("%f", &current_ptr->hours);
	  printf("\n");
	  /* Ask user if they want to add another employee */
	  printf("Would you like to add another employee? (y/n): ");
	  scanf("%s", answer);

	  if (value = toupper(answer[0]) != 'Y')
	  {
		 current_ptr->next = (struct employee *) NULL;
		 more_data = 0;
	  } else
	  {
		 /* set the next pointer of the current node to point to the new node */
		 current_ptr->next =

			(struct employee *) malloc(sizeof(struct employee));
		 /* move the current node pointer to the new node */
		 current_ptr = current_ptr->next;
	  }
   }

   /* Function call to print out listing of all employee IDs, wages, and hours */
   /* that were entered */
   print_list(current_ptr);

   printf("\n\nEnd of program\n");

   return 0;

}