Answered: namespace

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

#include "Bank.h"

#include <iostream>
#include <fstream>
#include <string>
#include <vector>

using namespace std;

int main() {
Account** accounts = new Account * [10];
ifstream infile;
infile.open("bank2.txt");
if ( !infile )
cerr << "File cannot be opened" << endl;
else
cout << "File Opened" << endl;

string operationType;
int totalAccount = 0;

while (infile >> operationType) {
if (operationType == "Saving") {
int id;
double initialBalance, minimumBalance, annualInterestRate;
infile >> id >> initialBalance >> minimumBalance >> annualInterestRate;
Saving* savingAccount = new Saving();
savingAccount->setInterest(annualInterestRate);
savingAccount->setMinBalance(minimumBalance);
accounts[totalAccount] = savingAccount;
accounts[totalAccount]->setID(id);
accounts[totalAccount]->setBalance(initialBalance);
totalAccount++;
cout << "Saving account number " << totalAccount << " created" << endl;
cout << "with an initial balance of $" << accounts[totalAccount - 1]->getBalance() << endl;
}
else if (operationType == "Checking") {
int id;
double initialBalance, minimumBalance, monthlyFees;
infile >> id >> initialBalance >> minimumBalance >> monthlyFees;
Checking* checkingAccount = new Checking();
checkingAccount->setMonthlyFee(monthlyFees);
checkingAccount->setMinBalance(minimumBalance);
accounts[totalAccount] = checkingAccount;
accounts[totalAccount]->setID(id);
accounts[totalAccount]->setBalance(initialBalance);
totalAccount++;
cout << "Checking account number " << totalAccount << " created" << endl;
cout << "with an initial balance of $" << accounts[totalAccount - 1]->getBalance() << endl;
}
else if (operationType == "Deposit") {
int id;
double amount;
int pos;
bool isFound = false;
infile >> id >> amount;
for (int i = 0; i < totalAccount; i++) {
if (accounts[i]->getID() == id) {
isFound = true;
accounts[i]->deposit(amount);
pos = i;
}
}
if (!isFound) {
cout << "Invalid Account Number - " << id << endl;
}
else {
cout << "Deposited $" << amount << " into account #" << id << endl;
cout << "current balance is $" << accounts[pos]->getBalance() << endl;
}
}
else if (operationType == "Withdraw") {
int id;
double amount;
int pos;
infile >> id >> amount;
bool isFound = false;
for (int i = 0; i < totalAccount; i++) {
if (accounts[i]->getID() == id) {
isFound = true;
accounts[i]->withdraw(amount);
pos = i;
}
}
if (!isFound) {
cout << "Invalid Account Number - " << id << endl;
}
else {
cout << "Withdraw $" << amount << " from account #" << id << endl;
cout << "current balance is $" << accounts[pos]->getBalance() << endl;
}
}
else if (operationType == "Balance") {
int id;
infile >> id;
int pos;
bool isFound = false;
for (int i = 0; i < totalAccount; i++) {
if (accounts[i]->getID() == id) {
isFound = true;
cout << "current balance in account #" << id << " is $" << accounts[i]->getBalance() << endl;
pos = i;
}
}
if (!isFound) {
cout << "Invalid Account Number - " << id << endl;
}
}
else if (operationType == "Close") {
cout << "End of month processing complete" << endl;
for (int i = 0; i < totalAccount; i++) {
accounts[i]->closeMonth();
}
}
else if (operationType == "Report") {
for (int i = 0; i < totalAccount; i++) {
cout << accounts[i]->accountString() << endl;
}
}
else {
cout << "Unrecognised command - " << operationType << endl;
string dummyLine;
getline(infile, dummyLine);
}
}
infile.close();
}

The text highlights an issue with end-of-month financial processing:

"This does not handle the end of month processing correctly. The monthly fee should only be deducted if the balance is below the minimum. Similarly, the interest should only be added if the balance is above the minimum. Please correct and resubmit."

Explanation:
- The message indicates that the current system incorrectly processes monthly fees and interest.
- Monthly fees need to be deducted only when account balances fall below a minimum threshold.
- Interest should be credited only when account balances are above this threshold.
- Users are requested to correct these errors and resubmit their work for review.

**End of Month Financial Summary**

- **Saving Account a1**: Balance of $1014.39
- **Checking Account a2**: Balance of $2015.09
- **Saving Account a3**: Balance of $3051.05
- **Checking Account a4**: Balance of $3987.65

This financial summary illustrates the end-of-month balances for a set of savings and checking accounts. Each account is identified by a unique code (a1, a2, etc.) and displays the precise balance in U.S. dollars.

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