/* program to compile information about people in one family */

#include <string.h>
#include <stdio.h>

int main ()
{
  /* initialize two given_name names, as character arrays 
     with NULL at end 
   */
  char given_name1 [10] = {'H', 'e', 'n', 'r', 'y', 0};
  char given_name2 [10] = {'T', 'h', 'e', 'r', 'e', 's', 'a', 0};

  /* initial two more given_name names as strings
   */
  char given_name3 [10] = "Donna";
  char given_name4 [10] = "Barbara";

  /* initial common last name in family */
  char surname [10] = "Walker";

  /* add space before surname */
  char space_surname [20] = " ";
  strcat (space_surname, surname);

  /* compute full names */
  char full_name1 [20];
  char full_name2 [20];
  char full_name3 [20];
  char full_name4 [20];
  
  /* copy given names */
  strcpy (full_name1, given_name1);
  strcpy (full_name2, given_name2);
  strcpy (full_name3, given_name3);
  strcpy (full_name4, given_name4);

  /* combine given and surname (with space) to obtain full name */
  strcat (full_name1, space_surname);
  strcat (full_name2, space_surname);
  strcat (full_name3, space_surname);
  strcat (full_name4, space_surname);

  /* print full names in family */
  printf ("People in this family\n");
  printf ("     %s\n", full_name1);
  printf ("     %s\n", full_name2);
  printf ("     %s\n", full_name3);
  printf ("     %s\n", full_name4);

  /* determine which given_name comes first in alphabetical order 
     check name by name; 
     before indicates earliest name found during processing
  */
  char * before = given_name1;

  if (strcmp (before, given_name2) > 0)
    before = given_name2;

  if (strcmp (before, given_name3) > 0)
    before = given_name3;

  if (strcmp (before, given_name4) > 0)
    before = given_name4;

  printf ("Given name coming first in alphabetical order: %s\n",
          before);

  printf ("Number of characters in first alphabetical name: %d\n",
          strlen (before));

  return 0;
}