Instructions

You've been tempted back to Hyperia (with the high inflation) for an eye watering daily rate.

The Central Bank is contemplating introducing the US Dollar as a second currency so all the accounting systems have to be adapted to handle multiple currencies.

You have been asked to implement the currency amount object.

1. Enable the currency amount to be tested for equality

Please modify the CurrencyAmount struct to handle equality. If the two currency amount structs do not have the same currency ("USD" or "HD") then an instance of ArgumentException should be thrown.

2. Compare currency amounts

Please modify the CurrencyAmount struct to handle comparisons (> and <, only). If the two currency amount structs do not have the same currency ("USD" or "HD") then an instance of ArgumentException should be thrown.

3. Add and subtract currency amounts

Please modify the CurrencyAmount struct to handle arithmetic addition and subtraction (+ and -, only). If the two currency amount structs do not have the same currency ("USD" or "HD") then an instance of ArgumentException should be thrown.

4. Multiply and divide currency amounts

Please modify the CurrencyAmount struct to handle arithmetic multiplication and division (* and /, only).

5. Convert the currency amount to a double

Please modify the CurrencyAmount struct so that an instance can be explicitly cast to a double.

6. Convert the currency amount to a decimal

Please modify the CurrencyAmount struct so that an instance can be implicitly converted to a decimal.