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/******************************************************
* This program prompts the user for a sequence of bank
* transactions and then prints a bank statement detailing
* the list of deposits, withdrawals, the daily balance for
* each day. Finally, the total interest earned on the account
* is displayed.
******************************************************/
#include <iostream>
#include <list>
#include <string>
#include <cstdlib>
#include <iomanip>
#include <algorithm>
#include "Transaction.h"
#include "TransactionType.h"
#define MONTHLY_INTEREST 0.005
using namespace std;
Transaction promptTransaction();
float promptFloat(string);
bool canParseAsFloat(string);
void showStatement(list<Transaction>);
bool compareByDay(Transaction, Transaction);
int main()
{
//Create a list to store transactions
list<Transaction> transactions;
//Insert initial transaction
transactions.push_back(Transaction(1, 1143.24, string("initial balance"), DEPOSIT));
//Prompt user for transactions
while(true)
{
cout << "Enter a transaction (Y/N): ";
string user;
getline(cin, user);
if(user == "Y" || user == "y")
{
transactions.push_back(promptTransaction());
cout << endl;
}
else if(user == "N" || user == "n")
break;
else
cout << "Invalid command." << endl;
}
//Print bank statement
showStatement(transactions);
}
/**
* Prompt the user for the transaction details,
* create the transaction, and return it.
*/
Transaction promptTransaction()
{
//Prompt transaction day
int day = (int)promptFloat(string("Enter transaction day (e.g. 1): "));
//Prompt transaction type
string type;
bool isWithdrawal = false;
while(true)
{
cout << "Enter 'W' for a withdrawal or 'D' a deposit: ";
getline(cin, type);
if(type == "W" || type == "w")
{
isWithdrawal = true;
break;
}
else if(type == "D" || type == "d")
break;
else
cout << "Invalid type." << endl;
}
//Prompt transaction amount
float amount = promptFloat(string("Enter transaction amount (e.g. 123.99): "));
//Prompt transaction description
cout << "Enter transaction description: ";
string description;
getline(cin, description);
//Create transaction
if(isWithdrawal)
return Transaction(day, amount, description, WITHDRAWAL);
else
return Transaction(day, amount, description, DEPOSIT);
}
/**
* Prompt the user for a floating-point value with the given
* message. If an invalid value is given, the user is re-prompted.
*/
float promptFloat(string msg)
{
while(true)
{
cout << msg;
string val;
getline(cin, val);
if(isalnum(val[0]) && canParseAsFloat(val))
return atof(val.c_str());
else
cout << "Invalid value." << endl;
}
}
/**
* Check whether the given value can be parsed as a floating-point
* number.
*/
bool canParseAsFloat(string val)
{
bool foundDot = false;
for(int i = 0; i < val.size(); i++)
{
if(val[i] == '.')
{
//Can't have two dots
if(foundDot)
return false;
else
foundDot = true;
}
//Each character must be a digit
else if(val[i] < '0' || val[i] > '9')
return false;
}
return true;
}
/**
* Display a formatted table of all the transactions, the daily
* balances, and the interest earned.
*/
void showStatement(list<Transaction> transactions)
{
//Show heading
cout << "\nGenerating statement..." << endl;
//Show transaction table
cout << "\n" << left << setw(5) << "Day" << left << setw(15) << "Amount ($)"
<< left << setw(20) << "Description" << left << setw(15) << "Type"
<< left << setw(15) << "Balance ($)" << endl;
cout << "--------------------------------";
cout << "--------------------------------" << endl;
cout << endl;
//Sort transactions by day
transactions.sort(compareByDay);
//Show transactions and compute daily balance
list<Transaction>::iterator it = transactions.begin();
float balance = 0;
float minBalance = transactions.front().getAmount();
float totalBalance = 0;
float totalInterest = 0;
int month;
int monthOfLastTransaction;
for(; it != transactions.end(); it++)
{
Transaction t = *it;
//Display transaction details
cout << left << setw(5) << t.getDay();
cout << left << setw(15)<< fixed << setprecision(2) << t.getAmount();
cout << left << setw(20) << t.getDescription();
//If this transaction is in a new month
//compute the interest on the current balance
month = (t.getDay()-1)/30;
monthOfLastTransaction = month;
if(month != monthOfLastTransaction)
totalInterest += balance * MONTHLY_INTEREST;
//Display transaction type and update balance
TransactionType type = t.getType();
cout << left << setw(15);
if(type == WITHDRAWAL)
{
balance -= t.getAmount();
cout << "Withdrawal";
}
else
{
balance += t.getAmount();
cout << "Deposit";
}
cout << left << setw(15) << fixed << setprecision(2) << balance << endl;
//Set minimum balance
if(balance < minBalance)
minBalance = balance;
//Set total balance
totalBalance += balance;
}
cout << endl;
//Show minimum balance, average balance, and interest
cout << "Minimum daily balance: $" << fixed << setprecision(2) << minBalance << endl;
cout << "Average daily balance: $" << fixed << setprecision(2) << (totalBalance/transactions.size()) << endl;
cout << "Total interest: $" << fixed << setprecision(2) << totalInterest << endl;
system("PAUSE");
}
/**
* Compare the two transactions by day and return whether the first
* transaction's day is less than the second.
*/
bool compareByDay(Transaction first, Transaction second)
{
return first.getDay() < second.getDay();
}
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