Declare an enum Currency.
It should include the following currency codes (according to ISO 4217):
- USD — United States dollar
- EUR — Euro
- GBP — Pound sterling
- RUB — Russian ruble
- UAH — Ukrainian hryvnia
- KZT — Kazakhstani tenge
- CAD — Canadian dollar
- JPY — Japanese yen
- CNY — Chinese yuan
You must include all of the codes presented above and nothing else. The constants in the enum can be declared in any order.
Do not make the enum public for checking purposes.
