Assume that a bank maintains two kinds of accounts for customers, one called as savings account and the other as current account. The savings account provides compound interest at the annual rate of 10%. Current account holders get simple interest of 5% per year. Create a class account that stores customer name and account number. From this, derive the classes: current_account and saving_account. Include necessary member functions and calculate the total amount of money in an account for both types of customers.

 The program is given below:

#include <iostream>

#include <string>

#include<math>

using namespace std;

class Account {

protected:

    string name;

    int accountNumber;

    double balance;

public:

    Account(string name, int accountNumber, double balance) {

        this->name = name;

        this->accountNumber = accountNumber;

        this->balance = balance;

    }

    virtual void calculateInterest() = 0; // pure virtual function

    void display() {

        cout << "Name: " << name << endl;

        cout << "Account number: " << accountNumber << endl;

        cout << "Balance: " << balance << endl;

    }

};

class Savings_Account : public Account {

public:

    Savings_Account(string name, int accountNumber, double balance,int t) : Account(name, accountNumber, balance) {

    }

    void calculateInterest() {

        double interest = balance * pow((1+10/100),t);

        balance += interest;

    }

};

class Current_Account : public Account {

public:

    Current_Account(string name, int accountNumber, double balance, int t) : Account(name, accountNumber, balance) {

    }

    void calculateInterest() {

        double interest = balance * 0.05*t;

        balance += interest;

    }

};

int main() {

    Account* accounts[2];

    accounts[0] = new Savings_Account("John Smith", 1234, 1000,1);

    accounts[1] = new Current_Account("Jane Doe", 5678, 2000,1);

    for (int i = 0; i < 2; i++) {

        accounts[i]->calculateInterest();

        accounts[i]->display();

        cout << endl;

    }

    for (int i = 0; i < 2; i++) {

        delete accounts[i];

    }

    return 0;

}

Explanation: 

The program defines a base class "Account" that stores the common data members and has a pure virtual function 'calculateInterest()' to calculate the interest for a particular account type.

Two derived classes, "Savings_Account" and "Current_Account", implement the 'calculateInterest()' function based on their specific interest rates.

The "main()" function creates an array of "Account" pointer that can hold objects of both derived classes. It then creates two objects of the derived classes and stores their pointers in the array.

A loop iterates over the array, calling the "calculateInterest()" and "display()" functions for each account, and printing the results.

Finally, the program deletes the dynamically allocated objects to free up memory.