text: // useheader.c -- using names_st struct
  #include <stdio.h>
  #include "List_16_6_names_st.h"
  // remember to link List_16_7_names_st.c
  int main(void)
  {
      names candidate;
      get_names(&candidate);
      printf("Let's welcome ");
      show_names(&candidate);
      printf(" to this program!\n");
      return 0;
  }