How do I implement the factory pattern in financial systems with C++?

The Factory Pattern is a creational design pattern that provides a way to create objects without specifying the exact class of the object that will be created. This is particularly useful in financial systems where different financial instruments may need to be created dynamically.

In a financial context, you might use the Factory Pattern to create different types of financial instruments like stocks, bonds, or options. Each of these instruments could have unique properties and behaviors, and the Factory Pattern allows for the creation of these objects in a flexible and scalable manner.

Here’s an example of implementing the Factory Pattern in a simple financial system:


        <?php
        // Interface for Financial Instruments
        interface FinancialInstrument {
            public function getDetails();
        }
        
        // Concrete classes for different financial instruments
        class Stock implements FinancialInstrument {
            public function getDetails() {
                return "This is a stock.";
            }
        }
        
        class Bond implements FinancialInstrument {
            public function getDetails() {
                return "This is a bond.";
            }
        }
        
        class Option implements FinancialInstrument {
            public function getDetails() {
                return "This is an option.";
            }
        }
        
        // Factory class to generate financial instruments
        class FinancialInstrumentFactory {
            public static function create($type) {
                switch ($type) {
                    case 'stock':
                        return new Stock();
                    case 'bond':
                        return new Bond();
                    case 'option':
                        return new Option();
                    default:
                        throw new Exception("Financial Instrument type not recognized.");
                }
            }
        }
        
        // Client code to use the factory
        try {
            $instrument = FinancialInstrumentFactory::create('stock');
            echo $instrument->getDetails(); // Output: This is a stock.
        } catch (Exception $e) {
            echo $e->getMessage();
        }
        ?>

How do I implement the factory pattern in financial systems with C++?

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How do I implement the factory pattern in financial systems with C++?

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