55 lines
1.2 KiB
Dart
55 lines
1.2 KiB
Dart
import 'dart:math';
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enum Car{Lada, BMW, Skoda}
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extension CarX on Car{
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static List<Car> generateRandomCar(int n){
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var rnd = Random();
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return List.generate(n, (i) => Car.values[rnd.nextInt(Car.values.length)]);
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}
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}
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class NewCar{
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final String name;
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double cost;
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NewCar(this.name, this.cost);
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String get info => 'New car: $name, cost: $cost';
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}
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class OldCar extends NewCar{
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final int mileage;
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OldCar(
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super.name,
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super.cost, {
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required this.mileage
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});
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double costOldCar(cost, mileage){
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return cost - (mileage * 0.7);
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}
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//String info() => 'Old car: $name, cost: $cost, mileage: $mileage';
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}
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void main(){
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asynchronous();
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}
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Future<void> asynchronous() async{
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for (int i = 1; i < 5; i++) {
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List<Car> car = CarX.generateRandomCar(1);
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final auto = NewCar('$car', i * 1000000);
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await Future.delayed(
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const Duration(milliseconds: 10),
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() => print(auto.info),
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);
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final oldAuto = OldCar('$car', i * 1000000 - (i * 100000 * 0.7), mileage: i * 100000);
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await Future.delayed(
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const Duration(milliseconds: 20),
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() => print(oldAuto.info),
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);
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print('');
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}
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} |