BankAccount.h

//DISPLAY 10.6 /Program to demonstrate the class BankAccount.
//Demonstrates an alternative implementation of the class BankAccount.
#include <iostream>
using namespace std;

//Class for a bank account:

class BankAccount {
public:
BankAccount(int dollars, int cents, double rate);
//Initializes the account balance to \$dollars.cents and
//initializes the interest rate to rate percent.

BankAccount(int dollars, double rate);
//Initializes the account balance to \$dollars.00 and
//initializes the interest rate to rate percent.

BankAccount();
//Initializes the account balance to \$0.00 and the interest rate to 0.0%.

void update();
//Postcondition: One year of simple interest has been added to the account
//balance.

double get_balance();
//Returns the current account balance.

double get_rate();
//Returns the current account interest rate as a percentage.

void output(ostream& outs);
//Precondition: If outs is a file output stream, then
//outs has already been connected to a file.
//Postcondition: Account balance and interest rate
//have been written to the stream outs.

friend bool operator>(BankAccount a, BankAccount b);
friend BankAccount operator+(BankAccount a, BankAccount b);
friend BankAccount operator+(BankAccount a, int b);

private:
double balance;
double interest_rate;
double fraction(double percent);
//Converts a percentage to a fraction. For example, fraction(50.3)
//returns 0.503.

};

BankAccount.cpp

#include "BankAccount.h"

BankAccount::BankAccount(int dollars, int cents, double rate) {
if ((dollars < 0) || (cents < 0) || (rate < 0)) {
cout << "Illegal values for money or interest rate.\n";
balance = 0;
interest_rate = 0;
} else {
balance = dollars + 0.01 * cents;
interest_rate = rate;
}
}

BankAccount::BankAccount(int dollars, double rate) {
if ((dollars < 0) || (rate < 0)) {
cout << "Illegal values for money or interest rate.\n";
}
balance = dollars;
interest_rate = rate;
}

BankAccount::BankAccount() : balance(0), interest_rate(0.0) {
//Body intentionally empty.
}

//Uses iostream:

void BankAccount::output(ostream& outs) {
outs.setf(ios::fixed);
outs.setf(ios::showpoint);
outs.precision(2);
outs << "Account balance \$" << balance << endl;
outs << "Interest rate " << interest_rate << "%" << endl;
}

void BankAccount::update() {
balance += balance * fraction(interest_rate);
}

double BankAccount::fraction(double percent) {
return percent / 100;
}

double BankAccount::get_balance() {
return balance;
}

bool operator>(BankAccount a,BankAccount b) {
return a.balance>b.balance;
}

BankAccount operator+(BankAccount a,BankAccount b) {
BankAccount newAccount;
newAccount.balance=a.balance+b.balance;
newAccount.interest_rate=max(a.interest_rate,b.interest_rate);
return newAccount;
}

BankAccount operator+(BankAccount a,int b) {
BankAccount newAccount;
newAccount.balance=a.balance+b;
newAccount.interest_rate=a.interest_rate;
return newAccount;
}

main.cpp

#include "BankAccount.h"

int main() {
BankAccount account1(100, 8.3), account2(3000, 33, 6.2);

cout << "account1 initialized as follows:\n";
account1.output(cout);
cout << "account2 initialized as follows:\n";
account2.output(cout);

account1.update();
account1.update();
account1.update();
account1.update();

account2.update();

cout << "account1 is:\n";
account1.output(cout);
cout << "account2 is:\n";
account2.output(cout);

if (account2 > account1) {
cout << "2 is has more money";
} else {
cout << "1 is has more money";
}
BankAccount a3 = account1 + account2;
cout << "New account is:\n";
a3.output(cout);

BankAccount a4 = account1 + 1500;
cout << "New account is:\n";
a4.output(cout);
return 0;
}

This topic: SCMP118/Fall2016 > WebHome > CodeMultiArrays
Topic revision: r2 - 2017-10-25 - JimSkon

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