c pointer

#define <stdio.h>
#define <stdlib.h>
#define STU_SIZE sizeof(stu)
typedef struct student{
    int id;
    struct student* next;
}stu;
void p_list(stu *node);
int main(int argc, char** argv) {

    stu* head;
    stu* temp;
    head = NULL;
    for(int i = 0; i < 20; i ++){
        temp = malloc(STU_SIZE);
        temp->id = i;
        i += 2;
        temp->next = head;
        head = temp;
    }
    p_list(head);
    return 0;
}

void p_list(stu* node){
    while(node != NULL){
        printf("id:%d\thead:%d\thead->next:%d\n", node->id, node, node->next);
        node = node->next;
    }
}