ANSI-C: Nested structure in Linked List.

nestedStruct_linkedList.c

/**
 * ANSI-C: Nested structure in Linked List.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct subject_t {
    char name[32];
} subject_t;

typedef struct student_t {
    subject_t        *subject;
    struct student_t *next;
} student_t;

student_t *head_ptr;
student_t *student_ptr;

int main(void)
{
    /** Create student 1 */
    student_ptr = (student_t *)malloc(sizeof(student_t));
    student_ptr->subject = (subject_t *)malloc(sizeof(subject_t));
    strcpy( student_ptr->subject->name, "Programming Technique" );
    student_ptr->next = NULL;

    head_ptr = student_ptr;

    /** Create student 2 */
    student_ptr->next = (student_t *)malloc(sizeof(student_t));
    student_ptr = student_ptr->next;
    student_ptr->subject = (subject_t *)malloc(sizeof(subject_t));
    strcpy( student_ptr->subject->name, "Data Structure" );
    student_ptr->next = NULL;

    /** Test, print the value */
    student_ptr = head_ptr;
    printf( "Student 1 subject = %s\n", student_ptr->subject->name );
    student_ptr = student_ptr->next;
    printf( "Student 2 subject = %s\n", student_ptr->subject->name );

    return 0;
}