Question

C++ I will thumb it up if its accurate.

Learning Objective: To implement friend functions, and overload operators as friend functions and member functions

Instructions:

• Create a class called BankAccount
• Declare the following member variable: double balance
• Include the necessary constructors, accessors and mutators
  • Be sure to use the const keyword where necessary

Part 1 Overload the +, -,* and /, >=, and <= as friend Functions

• Apply the overloaded the following operators as friend functions:
  +, -, *, /, >=, <=, << and >>
• Implement all of them in main, any way you see fit, demonstrate their use.

ex of overloaded operator as friend function prototype: 
friend BankAccount operator +(const BankAccount& account1, const BankAccount& account2);
friend BankAccount operator -(const BankAccount& account1, const BankAccount& account2);
friend bool operator >=(const BankAccount& account1, const BankAccount& account2)
friend bool operator =<(const BankAccount& account1, const BankAccount& account2)
friend bool operator ==(const BankAccount& account1, const BankAccount& account2)

Part 2 Overload the +=, -=, and == as member functions

• Apply the overloaded the following operators as friend functions:
  +=, == and -=
• Implement all of them in main, any way you see fit, demonstrate their use.

Grading criteria

The following is the basic criteria to be used to grade your submission. You start with 30 points and then you start losing points, as you don't do something that is required.

-5: missing header

-5: does not implement friend functions properly

-5: missing constructors

-5: does not implement accessors and mutators where necessary

-5: does not use const where necessary

-5: coding style: missing indentation

-5 missing an operator

-5 does not overload as member function properly

-10: Incorrect output.

-30: Late submission.

Answer 1

Here is the answer for your question in C++ Programming Language.

Kindly upvote if you find the answer helpful.

NOTE : I have used dev-c++ to run this code, hence I had to used #include "BankAccount.cpp" in main.cpp,

if including #include "BankAccount.h" please include header file only.

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CODE :

BankAccount.h

#include<iostream> using namespace std; class BankAccount{    //Class public attribute here    public:        //Necessary constructors        BankAccount();        BankAccount(double balance);        ~BankAccount(); //Destructor               //Accessor for balance        double getBalance();               //Mutator for balance        void setBalancce(double balance);               //Overloading operators        //Part 1 Overload the +, -,* and /, >=, and <= as friend Functions        friend BankAccount operator +(const BankAccount& account1, const BankAccount& account2);        friend BankAccount operator -(const BankAccount& account1, const BankAccount& account2);        friend bool operator>=(const BankAccount& account1, const BankAccount& account2);        friend bool operator<=(const BankAccount& account1, const BankAccount& account2);        friend bool operator==(const BankAccount& account1, const BankAccount& account2);           //Part 2 Overload the +=, -=, and == as member functions        BankAccount operator+=(const BankAccount& account2);        BankAccount operator-=(const BankAccount& account2);        bool operator==(const BankAccount& account2);           //class private attributes here    private:        double balance; };

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BankAccount.cpp

//Include header #include "BankAccount.h" //Implementing constructors BankAccount::BankAccount(){    this->balance = 0; } BankAccount::BankAccount(double balance){    this->balance = balance; } BankAccount::~BankAccount(){ } //Implementing accessors and mutators double BankAccount::getBalance(){    return this->balance; } void BankAccount::setBalancce(double balance){    this->balance = balance; } /*    PART - 1 */ //Implementing friend functions BankAccount operator+(const BankAccount& account1, const BankAccount& account2){    BankAccount account;          double balance = (account1.balance + account2.balance);    account.setBalancce(balance);         return account; } BankAccount operator-(const BankAccount& account1, const BankAccount& account2){    BankAccount account;      double balance = (account1.balance - account2.balance);    account.setBalancce(balance);         return account; } bool operator>=(const BankAccount& account1, const BankAccount& account2){      return account1.balance >= account2.balance; } bool operator<=(const BankAccount& account1, const BankAccount& account2){    return account1.balance <= account2.balance; } bool operator==(const BankAccount& account1, const BankAccount& account2){    return account1.balance == account2.balance; } /*    PART 2 */ //Implementing member functions BankAccount BankAccount::operator+=(const BankAccount& account2){    this->balance += account2.balance;      return *this; } BankAccount BankAccount::operator-=(const BankAccount& account2){    this->balance -= account2.balance;      return *this; } bool BankAccount::operator==(const BankAccount& account2){    return this->balance == account2.balance; }

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main.cpp

#include "BankAccount.cpp" #include<string> int main(){    BankAccount account1(10000);    BankAccount account2(3000);    BankAccount account3;    BankAccount account4;       cout << endl << "Using friend functions: " << endl;    cout << "===================================" << endl;    cout << "Account 1: (" << "Balance: " << account1.getBalance() << ")" << endl;    cout << "Account 2: (" << "Balance: " << account2.getBalance() << ")" << endl;       account3 = (account1 + account2);    cout << endl << "Adding account1 and account2 " << account3.getBalance() << endl;       account2.setBalancce(5000);       cout << endl << "Account2 balance has been set to " << account2.getBalance() << endl;       account4 = (account1 - account2);      cout << endl << "Subtracting account1 from account2 " << account4.getBalance() << endl;           string res = (account1 >= account2)?"True":"False";    cout << endl << "Is account1 greater than or equal to account2 ? " << res << endl;       res = (account1 <= account2)?"True":"False";    cout << endl << "Is account1 lesser than or equal to account2 ? " << res << endl;       res = (account1 == account2)?"True":"False";    cout << endl << "Is account1 equal to account2 ? " << res << endl;       cout << endl << "Using member functions: " << endl;    cout << "===================================" << endl;    account3 = account1 += account2;      cout << endl << "After adding account2 to account1 using +=,balance in account1 is: " << account1.getBalance() << endl;       account4 = account1 -= account2;      cout << endl << "After subtracting account2 from account1 using -=,balance in account1 is: " << account1.getBalance() << endl;       res = (account1 == account2)?"True":"False";    cout << endl << "Is account1 equal to account2 ? " << res << endl;       return 0; }

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SCREENSHOTS :

Please see the screenshots of the code below for the indentations of the code.

BankAccount.h

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BankAccount.cpp

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main.cpp

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OUTPUT :

NOTE : I had to put the comment "Using friend functions: " after displaying account balances. Kindly change accordingly.

Any doubts regarding this can be explained with pleasure :)