SQL with Manoj

Q32. Program to implement File Handling With Class Objects:

Define a class to represent a bank account. Include the following members:
  i) Depositor Name
 ii) Account Number
iii) Balance Amount

Member Function
  i) To Assign Initial values(opening balance Rs. 1000 by default)
 ii) To deposit an amount
iii) To withdraw an amount(if possible)
iv) To display the current balance

Write a file based program to store the records of at least ten accounts in “ACCOUNT_DETAIL” data file and perform the required manipulations- DEPOSIT, WITHDRAW & BAL_ENQUIRY using the file on a given account. The changes after each deposit and withdrawal should be updated in the given file.

… from College notes (BCA/MCA assignments):

#include <fstream.h>
#include <stdlib.h>
#include <iomanip.h>
#include <conio.h>

const int MAX = 100;

enum bool{_false, _true};

class Cbank{
	private:
		int accNo;
		char name[20];
		float bal;
	public:
		Cbank() : accNo(100){}
		void getAcc(int );
		bool accPresent(int );
		void saveBal(int, float );
		void dispAcc() const;
		void dispAll() const;
	};

void Cbank :: getAcc(int i){
	accNo += i;
	cout<<"\n Enter Name: ";
	cin>>name;
	cout<<"\n Enter Amount for opening Acc.: ";
	cin>>bal;
	}



bool Cbank :: accPresent(int _acnt){
	if(accNo == _acnt)
		return _true;
	else
		return _false;
	}

void Cbank :: saveBal(int type, float _amt){
	if(type == 2){		// Deposit.
		bal += _amt;
		cout<<"\n Balance Updated.";
		}
	else if(type == 3){	// Withdrawl.
		if(bal >= _amt){
			bal -= _amt;
			cout<<"\n Balance Updated.";
			}
		else
			cout<<"\n Not Enough Funds on Account, SORRY !!";
		}
	}

void Cbank :: dispAcc() const{
	cout<<"\n Account Information:-";
	cout<<"\n ~~~~~~~~~~~~~~~~~~~";
	cout<<"\n Account No.: "<<accNo;
	cout<<"\n Holders Name: "<<name;
	cout<<"\n Balance: "<<bal;
	}

void Cbank :: dispAll() const{
	cout<<endl<<setw(8)<<accNo<<setw(20)<<name<<setw(20)<<bal;
	}

void main(){
	int ch, i, _tot = 0;
	int _acc;
	float _amt;
	char nx;
	bool found;
	Cbank *Obank = new(Cbank[MAX]);
	fstream fstr;
	fstr.open("Bank.txt", ios::in | ios::nocreate);
	if(fstr){
		while(fstr){
			fstr.read((char *) &Obank[_tot], 
sizeof(Obank[_tot]));
			_tot++;
			}
		_tot -= 2;
		}
	fstr.close();
	// Data Retrieved form Disk.
	while(1){
		clrscr();
		cout<<"\n BANK AUTOMATION";
		cout<<"\n ~~~~~~~~~~~~~~~";
		cout<<"\n 1 -> Create Account.";
		cout<<"\n 2 -> Deposit Money.";
		cout<<"\n 3 -> Withdrawl Money.";
		cout<<"\n 4 -> Balance Inqury.";
		cout<<"\n 5 -> Display Accounts.";
		cout<<"\n 6 -> Exit.";
		cout<<"\n\n Enter your choice: ";
		cin>>ch;
		clrscr();
		switch(ch){
			case 1:	// Create Acc.
				while(_tot < MAX){
					cout<<"\n Account No.: "<<_tot+1;
					Obank[_tot].getAcc(_tot);
					cout<<"\n Want to add more (y/n): ";
					cin>>nx;
					_tot++;
					if(nx == 'n')
						break;
					}
				break;
			case 2:	// Deposit Money.
				found = _false;
				cout<<"\n Enter Account No: ";
				cin>>_acc;
				for(i=0; i<=_tot; i++){
					if(Obank[i].accPresent(_acc)){
						found = _true;
						break;
						}
					}
				if(!found){
					cout<<"\n Account Not Found.";
					break;
					}
				else{
					cout<<"\n Enter Amount to Deposit: ";
					cin>>_amt;
					Obank[i].saveBal(ch, _amt);
					}
				break;
			case 3:	// Withdrawl Money.
				found = _false;
				cout<<"\n Enter Account No: ";
				cin>>_acc;
				for(i=0; i<=_tot; i++){
					if(Obank[i].accPresent(_acc)){
						found = _true;
						break;
						}
					}
				if(!found){
					cout<<"\n Account Not Found.";
					break;
					}
				else{
					cout<<"\n Enter Amount to Withdrawl:";
					cin>>_amt;
					Obank[i].saveBal(ch, _amt);
					}
				break;
			case 4:	// Balance Inquiry.
				found = _false;
				cout<<"\n Enter Account No: ";
				cin>>_acc;
				for(i=0; i<=_tot; i++){
					if(Obank[i].accPresent(_acc)){
						found = _true;
						break;
						}
					}
				if(!found){
					cout<<"\n Account Not Found.";
					break;
					}
				else{
					Obank[i].dispAcc();
					}
				break;
			case 5:	// Display Acc.
				cout<<"\n Account Information:-";
				cout<<"\n ~~~~~~~~~~~~~~~~~~~";
				cout<<"\n ACC No."<<setw(20)
    <<"NAME"<<setw(20)<<"BALANCE";
				cout<<"\n``````````````````````````````````
  ``````````````````````````````````";
				for(i=0; i<_tot; i++)
					Obank[i].dispAll();
				break;
			case 6:	// Exit;
				fstr.open("Bank.txt", ios::out);
				for(i=0; i<=_tot; i++)
					fstr.write((char *) &Obank[i], 
sizeof(Obank[i]));
				fstr.close();
				// Data Saved to Disk.
				delete []Obank;
				exit(1);
			default:
				cout<<"\n Enter Appropriate Choice.";
			} // end of switch.
		getch();
		} // end of while.
	} // end of main.

Output:

BANK AUTOMATION

1 -> Create Account.
2 -> Deposit Money.
3 -> Withdrawl Money.
4 -> Balance Inqury.
5 -> Display Accounts.
6 -> Exit.

Enter your choice:1

Account No.: 1
Enter Name: Manoj

Enter Amount for opening Acc.: 1000

Want to add more (y/n): y

Account No.: 2
Enter Name: Nitin

Enter Amount for opening Acc.: 2000

Want to add more (y/n): n

Account Information:-

ACC No.                NAME             BALANCE
```````````````````````````````````````````````````````````````````
     100                 Manoj               1000
     101                 Nitin                 2000