Структура в бинарный файл

#include "stdafx.h" 
#include <iostream> 
#include <conio.h> 
#include <stdio.h> 
#include <string.h> 
#include <stdlib.h> 
#include <windows.h> 
using namespace std; 
FILE * fp; 
 
struct pupil 
{ char name[20]; 
 int age; 
 float rating; 
}; 
 
pupil make(); 
void print(pupil); 
void Srating(pupil); 
void form(pupil*,int); 
void pechat(pupil*,int); 
//void error(); 
 
 
int main() 
{ 
 fp=fopen("s.dat","a+"); 
 fwrite ((char*)mas,sizeof(mas),1,fp); 
  
 
//clrscr(); 
int n,i; 
cout«"\nRazmer massiva:"; 
cin»n; 
 
pupil*mass=new pupil [n]; 
form(mass,n); 
pechat(mass,n); 
fclose(fp); 
_getch(); 
return 0; 
} 
pupil make() 
{ 
float rating;char name[20];int age; 
cout«"Name:"; 
cin»name; 
cout«"Age:"; 
cin»age; 
cout«"Rating:"; 
cin»rating; 
pupil p; 
strcpy(p.name,name); 
p.age=age; 
p.rating=rating; 
return p; 
} 
void print(pupil p) 
{ 
cout«"\nName:"«p.name«"\tage:"«p.age«"\trating:"«p.rating; 
} 
void form(pupil*mass,int n) 
{ 
for(int i=0;i<n;i++) 
mass[i]=make(); 
} 
void pechat(pupil*mass,int n) 
{ 
for(int i=0;i<n;i++) 
print(mass[i]); 
cout«endl; 
cout«" 4 i wishe balov: "«endl; 
for(int i=0;i<n;i++) 
Srating(mass[i]); 
cout«endl; 
 
} 
 
void Srating(pupil p) 
{ 
if (p.rating>=4) 
cout«"\nName:"«p.name«"\tage:"«p.age«"\trating:"«p.rating; 
}