Читать книгу Programming Kotlin Applications - Бретт Мак-Лахлин, Brett McLaughlin - Страница 67

While that solution works, it's a bit inelegant. It is going to require every user of your Person class—you included—to add that F to decimals or to use the Float type for variables passed into a constructor. And, as you just learned, Kotlin uses Double as the default decimal type.

A better solution is to realize that if Kotlin defaults to Double, maybe you should, too. (At least, unless you have a really good reason not to.) So change your Person constructor to take in what most users will pass—a Double created from a typed-in number:

class Person(var firstName: String, var lastName: String, var height: Double, var age: Int, var hasPartner: Boolean) {

Easy enough! And, because you've anticipated how users will create a new instance of Person, you'll annoy your friendly developer comrades a lot less.

NOTE Don't forget to remove the F from the two numbers in your main function. If you don't, you'll get another error—this time from trying to pass a Float into a constructor that expects a Double.