Hi I am making a banking system in c++ but getting a problem I am not sharp in programmin if you can help then thanks

//***************************************************************
//                   HEADER FILE USED IN PROJECT
//****************************************************************

#include<iostream>
#include<conio.h>
#include<stdio.h>
#include<process.h>
#include<fstream>
#include<ctype.h>

//***************************************************************
//                   CLASS USED IN PROJECT
//****************************************************************
using namespace std;
class account
{
 int acno;
 char name[50];
 int deposit, withdraw;
 char type;
 public:
    void create_account()
    {
     cout<<"\nEnter The account No.";
     cin>>acno;
     cout<<"\n\nEnter The Name of The account Holder ";
     gets(name);
     cout<<"\nEnter Type of The account (C/S) ";
     cin>>type;
     type=toupper(type);
     cout<<"\nEnter The Initial amount(>=500 for Saving and >=1000 for current )";
     cin>>deposit;
     cout<<"\n\n\nAccount Created..";
         }

    void show_account()
    {
     cout<<"\nAccount No. : "<<acno;
     cout<<"\nAccount Holder Name : ";
     puts(name);
     cout<<"\nType of Account : "<<type;
     cout<<"\nBalance amount : "<<deposit;
     }

        void modify_account()
    {
     cout<<"\nAccount No. : "<<acno;
     cout<<"\nModify Account Holder Name : ";
     gets(name);
     cout<<"\nModify Type of Account : ";cin>>type;
     cout<<"\nModify Balance amount : ";cin>>deposit;
     }

void dep(int x)
{
  deposit+=x;
}

void draw(int x)
{
  deposit-=x;
}

void report()
{cout<<acno<<"\t"<<name<<"\t\t"<<type<<"\t\t"<<deposit<<endl;}

  int  retacno()
  {return acno;}

  float retdeposit()
  {return deposit;}

  char rettype()
  {return type;}

};         //class ends here



//***************************************************************
//        global declaration for stream object, object
//****************************************************************

 fstream fp;
 account ac;
  Write   w;
 Read    r;
 Modify  m;
 Delete  del;
 Display dis;
 Deposit dep;


//***************************************************************
//        function to write in file
//****************************************************************

class Write{
 public:
void write_account()
   {
    fp.open("account.dat",ios::out|ios::app);
    ac.create_account();
    fp.write((char*)&ac,sizeof(account));
    fp.close();
   }

};//class close

//***************************************************************
//        function to read specific record from file
//****************************************************************

class Read{
 public:
void display_sp(int n)
{
    clrscr();
    cout<<"\nBALANCE DETAILS\n";
    int flag=0;
    fp.open("account.dat",ios::in);
    while(fp.read((char*)&ac,sizeof(account)))
    {
     if(ac.retacno()==n)
        {
         ac.show_account();
         flag=1;
        }
    }
    fp.close();
if(flag==0)
 cout<<"\n\nAccount number does not exist";
    getch();
}

};//class close

//***************************************************************
//        function to modify record of file
//****************************************************************

class Modify{
 public:
void modify_account()
{
    int no,found=0;
    clrscr();
    cout<<"\n\n\tTo Modify ";
    cout<<"\n\n\tEnter The account No. of The account";
    cin>>no;
    fp.open("account.dat",ios::in|ios::out);
    while(fp.read((char*)&ac,sizeof(account)) && found==0)
       {
        if(ac.retacno()==no)
           {
            ac.show_account();
            cout<<"\nEnter The New Details of account"<<endl;
            ac.modify_account();
            int pos=-1*sizeof(ac);
            fp.seekp(pos,ios::cur);
            fp.write((char*)&ac,sizeof(account));
            cout<<"\n\n\t Record Updated";
            found=1;
           }
         }
    fp.close();
    if(found==0)
    cout<<"\n\n Record Not Found ";
    getch();
}

};//class close

//***************************************************************
//        function to delete record of file
//****************************************************************

class Delete{
 public:
void delete_account()
   {
    int no;
    clrscr();
    cout<<"\n\n\n\tDelete Record";
    cout<<"\n\nEnter The account no. of the customer You Want To Delete";
    cin>>no;
    fp.open("account.dat",ios::in|ios::out);
    fstream fp2;
    fp2.open("Temp.dat",ios::out);
    fp.seekg(0,ios::beg);
    while(fp.read((char*)&ac,sizeof(account)))
    {
     if(ac.retacno()!=no)
        {
         fp2.write((char*)&ac,sizeof(account));
         }
     }
    fp2.close();
    fp.close();
    remove("account.dat");
    rename("Temp.dat","account.dat");
    cout<<"\n\n\tRecord Deleted ..";
    getch();
    }

};//class close

//***************************************************************
//        function to display all accounts deposit list
//****************************************************************

class Display{
 public:
    void display_all()
    {
     clrscr();
     fp.open("account.dat",ios::in);
     if(!fp)
     {
       cout<<"ERROR!!! FILE COULD NOT BE OPEN\n\n\n Go To Admin Menu to create File";
       getch();
       return;
     }

     cout<<"\n\n\t\tACCOUNT HOLDER LIST\n\n";
      cout<<"====================================================\n";
      cout<<"A/c no.\tNAME\t\tType\t\tBalance\n";
      cout<<"====================================================\n";

      while(fp.read((char*)&ac,sizeof(account)))
     {
       ac.report();
    }
     fp.close();
}

};//class close

//***************************************************************
//        function to deposit and withdraw amounts
//****************************************************************

class Deposit{
 public:
void deposit_withdraw(int option)
{
    int no,found=0,amt;
    clrscr();
    cout<<"\n\n\tEnter The account No.";
    cin>>no;
    fp.open("account.dat",ios::in|ios::out);
    while(fp.read((char*)&ac,sizeof(account)) && found==0)
       {
        if(ac.retacno()==no)
       {
            ac.show_account();
            if(option==1)
               {
            cout<<"\n\n\tTO DEPOSITE AMOUNT ";
            cout<<"\n\nEnter The amount to be deposited";
            cin>>amt;
            ac.dep(amt);
               }
             if(option==2)
               {
            cout<<"\n\n\tTO WITHDRAW AMOUNT ";
            cout<<"\n\nEnter The amount to be withdraw";
            cin>>amt;
             int bal=ac.retdeposit()-amt;
             if((bal<500 && ac.rettype()=='S') || (bal<1000 && ac.rettype()=='C'))
                  cout<<"Insufficience balance";
                   else
                   ac.draw(amt);
              }
             int pos=-1*sizeof(ac);
             fp.seekp(pos,ios::cur);
             fp.write((char*)&ac,sizeof(account));
             cout<<"\n\n\t Record Updated";
             found=1;
           }
         }
    fp.close();
    if(found==0)
    cout<<"\n\n Record Not Found ";
    getch();
}

};//class close

//***************************************************************
//        INTRODUCTION FUNCTION
//****************************************************************

void intro()
{
 clrscr();
 gotoxy(31,11);
 cout<<"BANKING";
 gotoxy(35,14);
 cout<<"TRANSACTIONS";
 gotoxy(35,17);
 cout<<"SYSTEM";
 cout<<"\n\nMADE BY : your name";
 cout<<"\n\nCOMPANY : your Company name";
 getch();

}



//***************************************************************
//        THE MAIN FUNCTION OF PROGRAM
//****************************************************************


void main()
{
  char ch;
  intro();
  do
    {
      clrscr();
      cout<<"\n\n\n\tMAIN MENU";
      cout<<"\n\n\t01. NEW ACCOUNT";
      cout<<"\n\n\t02. DEPOSIT AMOUNT";
      cout<<"\n\n\t03. WITHDRAW AMOUNT";
      cout<<"\n\n\t04. BALANCE ENQUIRY";
      cout<<"\n\n\t05. ALL ACCOUNT HOLDER LIST";
      cout<<"\n\n\t06. CLOSE AN ACCOUNT";
      cout<<"\n\n\t07. MODIFY AN ACCOUNT";
      cout<<"\n\n\t08. EXIT";
      cout<<"\n\n\tSelect Your Option (1-8) ";
      ch=getche();
      switch(ch)
      {
        case '1': clrscr();
              w.write_account();
              getch();
            break;
        case '2': clrscr();
              dep.deposit_withdraw(1);
              break;
        case '3': clrscr();
              dep.deposit_withdraw(2);
              getch();
                    break;
        case '4': int num;
                     clrscr();
                     cout<<"\n\n\tEnter The account No. ";
                     cin>>num;
                     r.display_sp(num);
                     break;
        case '5': clrscr();
              dis.display_all();
            getch();
             break;
        case '6': del.delete_account();
              break;
         case '7': clrscr();
                   m.modify_account();
               getch();
               break;
          case '8':exit(0);
          default :cout<<"\a";
    }
    }while(ch!='8');
}

//***************************************************************
//                END OF PROJECT
//***************************************************************

So apart from adding "using namespace std;", have you done anything else to the code?

That is, apart from simply doing copy and paste from here
http://www.scribd.com/doc/51963645/bank-cpp

> I am not sharp in programmin
No, and unless you actually buckle down and start writing YOUR OWN PROGRAMS, you never will be.