#include<stdio.h>
#define NAME_SIZE 80 + 1
#define TITLE_SIZE 40 + 1

main()
{

  int age, total = 0, count = 0;
  char employeeName[NAME_SIZE];
  char employeeTitle[TITLE_SIZE];
  FILE *fpin;

  fpin = fopen("employee.dat", "r");

  if ( fpin == NULL)
  {
    printf ("Error: the data file does not exist\n\n");
    exit (1);
  }
  else
    while( fscanf(fpin, "%[^,],%d,%[^\n]\n", employeeName, &age, employeeTitle) == 3)
     {
         total += age;
         count += 1;
     }

  printf ("The average age is: %d\n\n", total / count);
  fclose(fpin);

} /* end of main program */