import package:flutter/material.dart;

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
	return MaterialApp(
  	title: Hitung BMI,
  	home: BmiCalculator(),
	);
  }
}

class BmiCalculator extends StatefulWidget {
  @override
  _BmiCalculatorState createState() => _BmiCalculatorState();
}

class _BmiCalculatorState extends State<BmiCalculator> {
  final TextEditingController _weightController = TextEditingController();
  final TextEditingController _heightController = TextEditingController();
  String _result = ;

  void _calculateBMI() {
	double weight = double.parse(_weightController.text);
	double height = double.parse(_heightController.text) / 100; // convert cm to m
	double bmi = weight / (height * height);

	setState(() {
  	_result = BMI Anda: ${bmi.toStringAsFixed(2)};
	});
  }

  @override
  Widget build(BuildContext context) {
	return Scaffold(
  	appBar: AppBar(
    	title: Text(Kalkulator BMI),
  	),
  	body: Column(
    	children: [
      	TextField(
        	controller: _weightController,
        	decoration: InputDecoration(labelText: Masukkan Berat (kg)),
        	keyboardType: TextInputType.number,
      	),
      	TextField(
        	controller: _heightController,
        	decoration: InputDecoration(labelText: Masukkan Tinggi (cm)),
        	keyboardType: TextInputType.number,
      	),
      	ElevatedButton(
        	onPressed: _calculateBMI,
        	child: Text(Hitung BMI),
      	),
      	Text(_result),
    	],
  	),
	);
  }
}