Сортировка структуры

[ANGeL_TbMbI]

Нужна помощь с сортировкой... Уже и swap, и qsort пробовал.. Что-то не выходит. Сортировка по полю паспорт. Был бы до ужаса благодарен за помощь!

#include<fstream.h>
#include<stdlib.h>
#include<stdio.h>
#include<conio.h>
#include<windows.h>
#include<string.h>
#include<iomanip.h>

struct Gotel
{
	int id;
	char fio[30];
	int pas;
	int got;
	char tgot[6];
	int vart;
} s[100];





void Prosmotr_vsey_BD();
void dobavit_sapiz();
void ochistit_BD();
void iz_faila();
  void avtor();
  void ARG();
  void ud_string ();

int main()
{
int k;
ifstream f;
 f.open("DAT1.TXT", fstream::app);
	f>>k;
        f.close();
	int vibor = 7;
	while (1)
	{
		if ((1 <= vibor && vibor <= 2) || (4 <= vibor && vibor <= 8) || (vibor == 31) || (vibor == 32) || (vibor == 33))
		{
			if (vibor == 1)
			{
			  avtor()	;
			}
			if (vibor == 2)
			{
				 iz_faila();
			}
			if (vibor == 31)
			{
				dobavit_sapiz();
			}
			if (vibor == 32)
			{
			 ud_string ()	;
			}
			if (vibor == 33)
			{
				ochistit_BD();
			}
			if (vibor == 4)
			{
				;
			}
			if (vibor == 5)
			{
				;
			}
			if (vibor == 6)
			{
				;
			}
			if (vibor == 7)
			{
				system("cls");
				cout << " MENU:\n";
				cout << "  1.Ob Avtore:\n";
				cout << "  2.Vvod  BD\n";
				cout << "  3.Redactirovanie BD:\n";
				cout << "    31.dobavit sapiz\n";
				cout << "    32.udalit sapiz\n";
				cout << "    33.ochistit BD\n";
				cout << "  4.Sortirovka AVG:\n";
				cout << "  5.Sortirovka DEC:\n";
				cout << "  6.Vuvod BD v file:\n";
				cout << "  7.Clear consol\n";
				cout << "  8.Exit\n\n";
			}
			if (vibor == 8)
			{
				break;
			}
		}
		else
		{
			cout << "ERROR! \n\n";
		}
		cout << "\n vibor ";
		cin >> vibor;
	}
	return 0;
}



void dobavit_sapiz()                                                        //func dobav zapis
{

int k;
ifstream u;
 u.open("DAT1.TXT", fstream::app);
	u>>k;
        u.close();
ofstream f ;
         f.open("DAT1.TXT");
         int d = k+1;
         f<<d;

    cout<<"\n id  "  ;
     cin>> s[k].id ;
       cout<<"\n FIO  "  ;
        cin>> s[k].fio  ;
          cout<<"\n Pasport  "  ;
          cin>> s[k].pas ;
          cout<<"\n Nomer v otele  " ;
           cin>> s[k].got ;

            cout<<"\n Type otelya  ";
           cin>> s[k].tgot ;

            cout<<"\n Vartist  "  ;
             cin>> s[k].vart ;


           //f.open("DAT1.txt");

            for(int i =0;i<k+1;i++){
            f <<"\n " << s[i].id ;
             f <<"\n " << s[i].fio;
             f <<"\n " << s[i].pas;
              f <<"\n " <<   s[i].got ;
              f <<"\n " << s[i].tgot ;
               f <<"\n " << s[i].vart ; }
             f.close();

  /*	cout << "=======================\n";
	cout << " ID: ";      cin >> s[k].id;
	cout << " Name: \n";
	cout << " Pasport: "; cin >> s[k].pas;
	cout << " Nomer: ";   cin >> s[k].got;
	cout << " Type: \n";
	cout << " Cost: ";    cin >> s[k].vart;
	cout << "=======================";
	cout << "\n\n";
	k = k + 1; */
}

void ochistit_BD()                                              //func ochistit BD
{
int k;
ifstream u;
 u.open("DAT1.TXT", fstream::app);
	u>>k;
        u.close();
	k = 0;
   ofstream f ;
         f.open("DAT1.TXT", fstream::trunc);
	cout << "BD ydalena! \n\n";
}
                                                               //func iz faila
void iz_faila()
{   char c[30];
  int k;
  int vop;
  ifstream f("DAT1.TXT");
  cout<<"Base Data : "<<"DAT1.TXT"<<endl;
  f>>k;
  for(int i=0;i<k;i++){
  	f>>s[i].id>>s[i].fio>>s[i].pas>>s[i].got>>s[i].tgot>>s[i].vart;
  }
cout<<"___________________________________________________________________";
cout<<"\n |ID |Name                          |Pasport|Nomer|Type   |Vartist|";
cout<<"\n |===|==============================|=======|=====|=======|=======|";

for(int i=0;i<k;i++){
	printf("\n |%3d|%30s|%7d|%5d|%7s|%7d|",s[i].id,s[i].fio,s[i].pas,s[i].got,s[i].tgot, s[i].vart) ;
	cout<<"\n |---|------------------------------|-------|-----|-------|-------";
}
  f.close();

}

void avtor()
{cout<< "    1 zadanie" ;                                        //func ob avtore
 }

 void ARG(){                                                         //nachalo sort

		}                                                              //konec sort





      void ud_string (){                                               //nachalo ud string




      }                                                                //konec ud string