bank.cpp

#include<iostream>
#include<fstream>
#include<cstdlib>
#include<vector>
#include<map>

using namespace std;
#define MIN_BALANCE 500

class InsufficientFunds{};


                              //  making a class called account 
                              // initializing class account


class Account

{
                              // declaring private variables
private:
long accountNumber;
string firstName;
string lastName;
float balance;
static long NextAccountNumber;

                            // declaring public methods
public:

                           // account default constructor


Account(){}

                          // account parameteized constructor


Account(string fname,string lname,float balance);

long getAccNo(){return accountNumber;}

string getFirstName(){return firstName;}

string getLastName(){return lastName;}

float getBalance(){return balance;}

void Deposit(float amount);

void Withdraw(float amount);


                      // declaring some static methods also..


static void setLastAccountNumber(long accountNumber);

static long getLastAccountNumber();


                      // declaring ofstream , ifstream...


friend ofstream & operator<<(ofstream &ofs,Account &acc);

friend ifstream & operator>>(ifstream &ifs,Account &acc);

friend ostream & operator<<(ostream &os,Account &acc);

};


                            // class ended here 



long Account::NextAccountNumber=0;



                              //  making a class called  bank
                              // initializing class bank


class Bank

{

private:

                                // declaring private variables

map<long,Account> accounts;

                                // declaring private methods...


public:


                                

Bank();

Account OpenAccount(string fname,string lname,float balance);

Account BalanceEnquiry(long accountNumber);

Account Deposit(long accountNumber,float amount);

Account Withdraw(long accountNumber,float amount);

void CloseAccount(long accountNumber);

void ShowAllAccounts();


                                    // bank destructor

~Bank();

};


                                    // main function..

int main()

{


                                    // initailizing objects 

Bank b;

Account acc;

int choice;

string fname,lname;

long accountNumber;

float balance;

float amount;

cout<<"Banking System"<<endl;

do

{


                                    // cout statments


cout<<"\n\tSelect one option below ";
cout<<"\n\t1 Open an Account";
cout<<"\n\t2 Balance Enquiry";
cout<<"\n\t3 Deposit";
cout<<"\n\t4 Withdrawal";
cout<<"\n\t5 Close an Account";
cout<<"\n\t6 Show All Accounts";
cout<<"\n\t7 Quit";
cout<<"\nEnter your choice: ";
cin>>choice;


                            // asking input from user

switch(choice)

{

case 1:

cout<<"Enter First Name: ";

cin>>fname;

cout<<"Enter Last Name: ";

cin>>lname;

cout<<"Enter initil Balance: ";

cin>>balance;

acc=b.OpenAccount(fname,lname,balance);

cout<<endl<<"Congradulation Account is Created"<<endl;

cout<<acc;

break;

case 2:

cout<<"Enter Account Number:";

cin>>accountNumber;

acc=b.BalanceEnquiry(accountNumber);

cout<<endl<<"Your Account Details"<<endl;

cout<<acc;

break;

case 3:

cout<<"Enter Account Number:";

cin>>accountNumber;

cout<<"Enter Balance:";

cin>>amount;

acc=b.Deposit(accountNumber, amount);

cout<<endl<<"Amount is Deposited"<<endl;

cout<<acc;

break;

case 4:

cout<<"Enter Account Number:";

cin>>accountNumber;

cout<<"Enter Balance:";

cin>>amount;

acc=b.Withdraw(accountNumber, amount);

cout<<endl<<"Amount Withdrawn"<<endl;

cout<<acc;

break;

case 5:

cout<<"Enter Account Number:";

cin>>accountNumber;

b.CloseAccount(accountNumber);

cout<<endl<<"Account is Closed"<<endl;
cout<<acc;

case 6:

b.ShowAllAccounts();

break;

case 7:
 break;

default:



cout<<"\nEnter corret choice";

exit(0);

}




}while(choice!=7);

return 0;

}

Account::Account(string fname,string lname,float balance)

{

NextAccountNumber++;

accountNumber=NextAccountNumber;

firstName=fname;


lastName=lname;

this->balance=balance;

}

void Account::Deposit(float amount)

{

balance+=amount;

}

void Account::Withdraw(float amount)

{

if(balance-amount<MIN_BALANCE)

throw InsufficientFunds();

balance-=amount;
}

void Account::setLastAccountNumber(long accountNumber)

{

NextAccountNumber=accountNumber;
}

long Account::getLastAccountNumber()

{

return NextAccountNumber;

}

ofstream & operator<<(ofstream &ofs,Account &acc)

{

ofs<<acc.accountNumber<<endl;

ofs<<acc.firstName<<endl;

ofs<<acc.lastName<<endl;

ofs<<acc.balance<<endl;
return ofs;
}

ifstream & operator>>(ifstream &ifs,Account &acc)

{

ifs>>acc.accountNumber;
ifs>>acc.firstName;
ifs>>acc.lastName;
ifs>>acc.balance;
return ifs;
}
ostream & operator<<(ostream &os,Account &acc)
{
os<<"First Name:"<<acc.getFirstName()<<endl;
os<<"Last Name:"<<acc.getLastName()<<endl;
os<<"Account Number:"<<acc.getAccNo()<<endl;
os<<"Balance:"<<acc.getBalance()<<endl;
return os;
}
Bank::Bank()
{
Account account;
ifstream infile;
infile.open("Bank.data");
if(!infile)
{
//cout<<"Error in Opening! File Not Found!!"<<endl;
return;
}
while(!infile.eof())
{
infile>>account;
accounts.insert(pair<long,Account>(account.getAccNo(),account));
}
Account::setLastAccountNumber(account.getAccNo());
infile.close();
}
Account Bank::OpenAccount(string fname,string lname,float balance)
{
ofstream outfile;
Account account(fname,lname,balance);
accounts.insert(pair<long,Account>(account.getAccNo(),account));
outfile.open("Bank.data", ios::trunc);
map<long,Account>::iterator itr;
for(itr=accounts.begin();itr!=accounts.end();itr++)
{
outfile<<itr->second;
}
outfile.close();
return account;
}
Account Bank::BalanceEnquiry(long accountNumber)
{
map<long,Account>::iterator itr=accounts.find(accountNumber);
return itr->second;
}
Account Bank::Deposit(long accountNumber,float amount)
{
map<long,Account>::iterator itr=accounts.find(accountNumber);
itr->second.Deposit(amount);
return itr->second;
}
Account Bank::Withdraw(long accountNumber,float amount)
{
map<long,Account>::iterator itr=accounts.find(accountNumber);
itr->second.Withdraw(amount);
return itr->second;
}
void Bank::CloseAccount(long accountNumber)
{
map<long,Account>::iterator itr=accounts.find(accountNumber);
cout<<"Account Deleted"<<itr->second;
accounts.erase(accountNumber);
}
void Bank::ShowAllAccounts()
{
map<long,Account>::iterator itr;
for(itr=accounts.begin();itr!=accounts.end();itr++)
{
cout<<"Account "<<itr->first<<endl<<itr->second<<endl;
}
}
Bank::~Bank()
{
ofstream outfile;
outfile.open("Bank.data", ios::trunc);
map<long,Account>::iterator itr;
for(itr=accounts.begin();itr!=accounts.end();itr++)
{
outfile<<itr->second;
}
outfile.close();
}