diff --git a/Banking-System/Bank.data b/Banking-System/Bank.data
new file mode 100644
index 0000000..eb0d3ce
--- /dev/null
+++ b/Banking-System/Bank.data
@@ -0,0 +1,16 @@
+1
+Yusuf
+Salaudeen
+25000
+2
+Zainab
+Akande
+3000
+3
+Jim
+Rohn
+10000
+4
+Kylian
+Mbappe
+12000
diff --git a/Banking-System/a.exe b/Banking-System/a.exe
new file mode 100644
index 0000000..8117511
Binary files /dev/null and b/Banking-System/a.exe differ
diff --git a/Banking-System/banking.cpp b/Banking-System/banking.cpp
new file mode 100644
index 0000000..22e54d8
--- /dev/null
+++ b/Banking-System/banking.cpp
@@ -0,0 +1,128 @@
+#include "banking.h"
+
+// Account class implementation
+
+long Account::nextActNum_ = 0;
+Account::Account(string firstName, string lastName, double bal){
+    firstName_ = firstName;
+    lastName_ = lastName;
+    bal_ = bal;
+    nextActNum_++;
+    actNum_ = nextActNum_;
+}
+        
+// accesors 
+double Account::bal() { return bal_; }
+long Account::actNum() { return actNum_; }
+string Account::firstName() { return firstName_; }
+string Account::lastName() { return lastName_; }
+        
+// manipulators 
+void Account::deposit(double amount){ bal_ += amount; }
+void Account::withdraw(double amount){ 
+    if (bal_ - amount < minimum_bal) {
+        throw InsufficientFunds();
+    } 
+    bal_-=amount;
+}
+void Account::lastActNum(long actNum){ nextActNum_ = actNum; }
+long Account::lastActNum(){ return nextActNum_; }
+
+ofstream &operator << (ofstream &ofs, Account &account){
+    ofs <<account.actNum_ << endl;
+    ofs << account.firstName_ << endl;
+    ofs << account.lastName_ << endl;
+    ofs << account.bal_ << endl;
+    return ofs;
+}
+ifstream &operator >> (ifstream &ifs, Account &account){
+    ifs >> account.actNum_;
+    ifs >> account.firstName_;
+    ifs >> account.lastName_;
+    ifs >> account.bal_;
+    return ifs;
+}
+ostream &operator << (ostream &os, Account &account){
+    os << "First Name: " << account.firstName() << endl;
+    os << "Last Name: " << account.lastName() << endl;
+    os << "Account Number: " << account.actNum() << endl;
+    os << "Balance: " << account.bal() << endl;
+    return os;
+}
+
+// Bank class implementation
+
+Bank::Bank(){
+    Account account;
+    ifstream infile;
+    infile.open("Bank.data");
+    if(!infile){
+        //cout << "Error in opening, file not found!\n";
+        return;
+    } 
+    while(!infile.eof()){
+        infile >> account;
+        pair<long, Account> entry;
+        entry = make_pair(account.actNum(), account);
+        accounts.insert(entry);
+        
+        // == accounts.insert(pair<long, Account>(account.actNum(), account));
+    }
+    Account::lastActNum(account.actNum());
+    infile.close();
+}
+
+Account Bank::openAct(string firstName, string lastName, double bal){
+    ofstream outfile;
+    Account account(firstName, lastName, bal);
+    accounts.insert(pair<long, Account>(account.actNum(), 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 actNum){
+    map<long, Account>::iterator itr;
+    itr = accounts.find(actNum);
+    return itr->second;
+}
+Account Bank::deposit(long actNum, double amount){
+    map<long, Account>::iterator itr;
+    itr = accounts.find(actNum);
+    itr->second.deposit(amount);
+    return itr->second;
+}
+Account Bank::withdraw(long actNum, double amount){
+    map<long, Account>::iterator itr;
+    itr = accounts.find(actNum);
+    itr->second.withdraw(amount);
+    return itr->second;
+}
+void Bank::closeAccount(long actNum){
+    map<long, Account>::iterator itr;
+    itr = accounts.find(actNum);
+    cout << "Account deleted.\n";
+    accounts.erase(actNum);
+}
+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();
+}  
\ No newline at end of file
diff --git a/Banking-System/banking.h b/Banking-System/banking.h
new file mode 100644
index 0000000..6939c6b
--- /dev/null
+++ b/Banking-System/banking.h
@@ -0,0 +1,55 @@
+#include <iostream>
+#include <fstream>
+#include <map>
+#include <cstdlib>
+#include <iterator>
+
+using namespace std;
+
+double const minimum_bal = 500.0;
+class InsufficientFunds{};
+
+class Account {
+    private:
+        double bal_;
+        long actNum_;
+        string firstName_;
+        string lastName_;
+        static long nextActNum_;
+    public:
+        // Constructors
+        Account() {};
+        Account(string firstName, string lastName, double bal);
+        
+        // Accesors 
+        double bal();
+        long actNum();
+        string firstName();
+        string lastName();
+        
+        void deposit(double amount);
+        void withdraw(double amount);
+        static void lastActNum(long actNum);
+        static long lastActNum();
+
+        // Operator overloading
+        friend ofstream &operator << (ofstream &ofs, Account &acccount);
+        friend ifstream &operator >> (ifstream &ifs, Account &account);
+        friend ostream &operator << (ostream &os, Account &account);
+};
+
+class Bank{
+    private:
+        map<long, Account> accounts;
+    public:
+        //Constructors
+        Bank();
+        // Methods
+        Account openAct(string firstName, string lastName, double bal);
+        Account balanceEnquiry(long actNum);
+        Account deposit(long actNum, double amount);
+        Account withdraw(long actNum, double amount);
+        void closeAccount(long actNum);
+        void showAllAccounts();
+        ~Bank();  
+};
diff --git a/Banking-System/main.cpp b/Banking-System/main.cpp
new file mode 100644
index 0000000..23f5fc3
--- /dev/null
+++ b/Banking-System/main.cpp
@@ -0,0 +1,72 @@
+#include "banking.cpp"
+
+int main(){
+
+    Bank bank;
+    Account account;
+
+    int choice;
+    string fname, lname;
+    long actNum;
+    double balance;
+    double amount;
+
+    cout << "\n\t******** Welcome to Our Banking System ***********" << endl;
+    do {
+        cout << "\n\t Select one option below";
+        cout << "\n\t 1: Open an Account";
+        cout << "\n\t 2: Balance Enquiry";
+        cout << "\n\t 3: Deposit Money";
+        cout << "\n\t 4: Withdraw Money";
+        cout << "\n\t 5: Close an Account";
+        cout << "\n\t 6: Show all Accounts";
+        cout << "\n\t 7: Quit";
+        cout << "\nEnter your choice: ";
+        cin >> choice;
+        switch (choice)
+        {
+        case 1:     // Open an account
+            cout << "Enter first name: "; cin >> fname;
+            cout << "Enter last name: "; cin >> lname;
+            cout << "Enter initial balance: "; cin >> balance;
+            account = bank.openAct(fname, lname, balance);
+            cout << "\nCongratulations! Account opened successfully!\n";
+            cout << account;
+            break;
+        case 2:     // Balance enquiry
+            cout << "Enter the account number: "; cin >> actNum;
+            account = bank.balanceEnquiry(actNum);
+            cout << "Your balance enquiry is: " << account;
+            break;
+        case 3:     // Deposit money
+            cout << "Enter the account number: "; cin >> actNum;
+            cout << "Enter amount to deposit: "; cin >> amount;
+            account = bank.deposit(actNum, amount);
+            cout << "The sum of " << amount
+                 << " has been deposited to the account associated with the account number " << actNum;
+            break;
+        case 4:     // Withdraw money
+            cout << "Enter the account number: "; cin >> actNum;
+            cout << "Enter amount to withdraw: "; cin >> amount;
+            account = bank.withdraw(actNum, amount);
+            cout << "The sum of " << amount
+                 << " has been withdrawn from the account associated with the account number " << actNum;
+            break;
+        case 5:     // Close an account
+            cout << "Enter the account number: "; cin >> actNum;
+            bank.closeAccount(actNum);
+            cout << "The account having the account number " << actNum << " was closed successfully";
+            break;
+        case 6:     // Show all accounts
+            bank.showAllAccounts();
+            break;
+        case 7:     // Quit
+            break;
+        default:
+            cout << "Enter a valid choice";
+            exit(0);
+        }
+    } while (choice != 7);
+
+    return 0;
+}