Question

Create a new class called Account with a main method that contains the following:

• A static variable called numAccounts, initialized to 0.

• A constructor method that will add 1 to the numAccounts variable each time a new Account object is created.

• A static method called getNumAccounts(). It should return numAccounts.

Test the functionality in the main method of Account by creating a few Account objects, then print out the number of accounts

Answer 1

SOLUTION

I am giving the implementation in 2 languages . The first one is C++.

Code:

#include <iostream>

using namespace std;

static int numAccounts = 0;

class Account

{

public:

Account()

{

numAccounts += 1;

}

};

static int getNumAccounts()

{

return numAccounts;

}

int main(int argc, char const *argv[])

{

Account a1;

Account a2;

cout << getNumAccounts()<<"\n";

return 0;

}

______________________________________________________________________________________________________

OUTPUT:

JAVA code :

class Account {

static int numAccounts = 0;

static int getNumAccounts(){

return numAccounts;

}

//constructor

Account(){

numAccounts += 1;

}

public static void main(String[] args) {

//testing the Class

Account a1 = new Account();

System.out.println(getNumAccounts());

Account a2 = new Account();

Account a3 = new Account();

System.out.println(getNumAccounts());

}

}

OUTPUT:

comment if any doubt