Запись дека в файл

#include <stdio.h>
#include <iostream>
#include <deque>
#include <conio.h>
#include <fstream>
using namespace std;
 
int main() //??????? ???????
{
FILE *file;
file=fopen("11111.txt","a+");
if(file==NULL)
    {
        printf("error");
        exit(0);
    }
 
deque<int> D; //Создание дека
deque<int>::iterator out;
char s[10];
int value;
int a;
 
char number;
do
{
cout<<"1. Add element in the beginning"<<endl;
cout<<"2. Add element in the end"<<endl;
cout<<"3. Delete the first element"<<endl;
cout<<"4. Delete the last element"<<endl;
cout<<"5. Print the first element"<<endl;
cout<<"6. Print the last element"<<endl;
cout<<"7. Size of the deque"<<endl;
cout<<"8. Save the deque into file "<<endl;
cout<<"0. Exit\n\n";
cout<<"Choose the command > "; cin>>number;
system("cls");
switch (number)
{
case '1':
cout<<"\nInput the element > "; cin>>value;
D.push_front(value);
/*FILE *file1;
file1=fopen("11.txt","a+");
fscanf(file1,"%d",value);*/
cout<<endl<<"Element has been added\n\n";
 
break;system("cls");
//-----------------------------------------------
case '2':
cout<<"\nInput the element > "; cin>>value;
D.push_back(value);
 
/*fprintf(file,"%d",value);*/
cout<<endl<<"Element has been added\n\n";
 
break;system("cls");
//-----------------------------------------------
case '3': if (D.empty()) cout<<"\nDeque is empty\n\n";
else
{
D.erase(D.begin());
cout<<endl<<"The element has been removed\n\n";
 
} break;system("cls");
//-----------------------------------------------
case '4': if (D.empty()) cout<<"\nDeque is empty\n\n";
else
{
D.erase(D.end()-1);
cout<<endl<<"The element has been removed\n\n";
 
} break;system("cls");
//-----------------------------------------------
case '5':
if (D.empty()) cout<<endl<<"Deque is empty\n\n";
else
{
out=D.begin();
cout<<"\nthe first element: "<<*out<<"\n\n";
} break;system("cls");
//-----------------------------------------------
case '6': if (D.empty()) cout<<"\nDeque is empty\n\n";
else
{
out=D.end()-1;
cout<<"\nThe last element: "<<*out<<"\n\n";
} break;system("cls");
//-----------------------------------------------
case '7':
if (D.empty()) cout<<endl<<"Deque is empty\n\n";
else cout<<"\nSize of the deque=: "<<D.size()<<"\n\n";
break;system("cls");
//-----------------------------------------------
case '8':
sprintf(s,"%d",&D);
fscanf(file,"%s",s);
 
printf("Deque was successfully written into file 10.txt");
break;
system("cls");
 
//--------------------------------------------------    
case '0': break;
default: cout<<endl<<"Command has not been identified\n\n";
break;
}
} while(number!='0');
fclose(file);
system("pause");
}

1)fprintf(file,"%s",&D);
2)fprintf(file,"%s",D);