#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
int main()
{
 
    typedef struct{
            char dummy[256];
            char surname[225];
            char name[256];
            int ID;
            char house[256];
            char street[256];
            char town[256];
            char county[256];
            char area[256];
            char country[256];
            char postcode[256];
            int phone;
            char email[256];
            char boattype[256];
            char boatname[256];
            }user;
 
FILE *file;
int i=0;
char number_of_people[256];
int nop;
char yetdummy[256]; 
char yetdummy2[256]; 
 
 
 file = fopen("members.data","r");
 if(file==NULL) {
    printf("Error: can't open file.\n");
    return 1;
  }
  else {
    printf("File opened successfully.\n");
         }
 fscanf(file,"%s \n", number_of_people);
 //printf("%s \n", number_of_people);
 
 nop = atoi(number_of_people);
 //printf("%d\n", nop);
 user usera[nop]; 
  for (i=0; i<nop; i++){
      fgets(usera[i].dummy, 256, file);        
      fgets(usera[i].surname, 256, file);  
      fgets(usera[i].name, 256, file);  
      fgets(yetdummy, 256, file);  
      usera[i].ID = atoi(yetdummy);      
      fgets(usera[i].house, 256, file);  
      fgets(usera[i].street, 256, file);  
      fgets(usera[i].town, 256, file); 
      fgets(usera[i].county, 256, file);  
      fgets(usera[i].area, 256, file);  
      fgets(usera[i].country, 256, file);  
      fgets(usera[i].postcode, 256, file);  
      fgets(yetdummy2, 256, file); 
      usera[i].phone = atoi(yetdummy2);
 
      fgets(usera[i].email, 256, file);  
      fgets(usera[i].boattype, 256, file);  
      fgets(usera[i].boatname, 256, file);        
 
     printf("Name is %s\n", usera[i].name);      
      printf("ID is %d\n", usera[i].ID);    
 }
 
  fclose(file);
 
}

#include<stdlib.h>
#include<stdio.h>
 
typedef struct student_data STUDENT_DATA;
 
struct student_data {
 int student_ID;
 int student_grade;
 STUDENT_DATA *left, *right;
};
 
STUDENT_DATA *new_student, *cur_student;
 
if ((new_student = malloc(sizeof(STUDENT_DATA))) == NULL) { abort(); }
 
new_student->student_ID = newID;
new_student->student_size = newsize;
new_student->left = NULL;
new_student->right = NULL;
 
if (!students) { students = new_student; return; }
 
cur_student = students;
while (cur_student) { 
 
if (newID == cur_student->student_ID) { abort(); }
 
if (newID < cur_student->student_ID) {
 if (cur_student->left == NULL) {
 cur_student->left = newstudent;
 return 1;
 }
 cur_student = cur_student->left;
 
 } else {
 if (cur_student->right == NULL) {
 cur_student->right = newstudent;
 return 1;
 }
 cur_student = cur_student->right;
 }
}