Once a pointer to a structure has been declared and been
set to the address of an instance of the structure, the
-> operator can be used to access the members.
Program
/*********************************************
** File: structptrs.c
** Author: R. Chang
** Date: 6/6/96
**
** This program shows how to use the pointer structure
** member operator.
**********************************************/
#include <stdio.h>
#include <string.h>
#define SIZE 25
/* create structure for student records */
typedef struct dummy_tag
{
char name [SIZE] ;
char major[SIZE] ;
double gpa ;
} studentRecord ;
/* studentRecPtr is an alias for studentRecord* */
typedef studentRecord * studentRecPtr ;
main()
{
studentRecord student1;
studentRecPtr ptr = &student1;
/* make up some information */
strcpy(student1.name, "Cal Ripken, Jr.") ;
strcpy(ptr -> major,"Business Management") ;
ptr -> gpa = 2.0 ;
printf("The Ironman himself:\n") ;
printf("%s\n", ptr -> name);
printf("%s\n", ptr -> major);
printf("%1.4f\n", ptr -> gpa);
}
Output
retriever[102] a.out
The Ironman himself:
Cal Ripken, Jr.
Business Management
2.0000
retriever[103]