Materi yang Harus Dikuasai dalam Pelatihan Junior Mobile Programmer untuk Lulus Sertifikasi BNSP

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),
        ],
      ),
    );
  }
}