Program for Banking Application

#include <iostream.h>
#include <iomanip.h>
#include <conio.h>

class    bank
{
char name[20];
int acno;
char actype[20];
int bal;
public :
void opbal(void);
void deposit(void);
void withdraw(void);
void display(void);
};

void bank :: opbal(void)
{
cout<<endl<<endl;
cout<<"Enter Name :-";
cin>>name;
cout<<"Enter A/c no. :-";
cin>>acno;
cout<<"Enter A/c Type :-";
cin>>actype;
cout<<"Enter Opening Balance:-";
cin>>bal;
}

void bank :: deposit(void)
{
cout<<"Enter Deposit amount :-";
int deposit=0;
cin>>deposit;
deposit=deposit+bal;
cout<<"\nDeposit Balance = "<<deposit;
bal=deposit;
}

void bank :: withdraw(void)
{
int withdraw;
cout<<"\nBalance Amount = "<<bal;
cout<<"\nEnter Withdraw Amount :-";
cin>>withdraw;
bal=bal-withdraw;
cout<<"After Withdraw Balance is "<<bal;
}

void  bank :: display(void)
{
cout<<endl<<endl<<endl;
cout<<setw(50)<<"DETAILS"<<endl;
cout<<setw(50)<<"name      "<<name<<endl;
cout<<setw(50)<<"A/c. No.     "<<acno<<endl;
cout<<setw(50)<<"A/c Type      "<<actype<<endl;
cout<<setw(50)<<"Balance     "<<bal<<endl;
}

void main()
{
clrscr();
bank o1;
int choice;
    do
    {
           cout<<"\n\nChoice List\n\n";
           cout<<"1)  To assign Initial Value\n";
         cout<<"2)  To Deposit\n";
         cout<<"3)  To Withdraw\n";
         cout<<"4)  To Display All Details\n";
         cout<<"5)  EXIT\n";
         cout<<"Enter your choice :-";
         cin>>choice;
         switch(choice)
         {
         case 1: o1.opbal();
                     break;
         case 2: o1.deposit();
                     break;
           case 3: o1.withdraw();
                     break;
         case 4: o1.display();
                     break;
            case 5: goto end;
         }
   }while(1);
end:
}