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

struct tag{                   /* the structure type */
       char lname[20];        /* last name */
       char fname[20];        /* first name */
       int age;               /* age */
       float rate;            /* e.g. 12.75 per hour */
       };

struct tag my_struct;         /* define the structure */

void show_name(struct tag *p);    /* function prototype */

int main(void)
{
  struct tag *st_ptr;         /* a pointer to a structure */
  st_ptr = &my_struct;        /* point the pointer to my_struct */
  strcpy(my_struct.lname,"Jensen");
  strcpy(my_struct.fname,"Ted");
  printf("\n%s ",my_struct.fname);
  printf("%s\n",my_struct.lname);
  my_struct.age = 63;
  show_name(st_ptr);          /* pass the pointer */
  return 0;
}


void show_name(struct tag *p)
{
  printf("\n%s ", p->fname);     /* p points to a structure */
  printf("%s ", p->lname);
  printf("%d\n", p->age);
}
.