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Penjumlahan Pengurangan Perkalian Pembagian private lateinit var spinnerOperasi: Spinner private var operasi = "Penjumlahan" spinnerOperasi = findViewById(R.id.spinnerOperasi)

spinnerOperasi.onItemSelectedListener = object : AdapterView.OnItemSelectedListener { override fun onItemSelected(parent: AdapterView<*>, view: View?, position: Int, id: Long) { operasi = parent.getItemAtPosition(position).toString() generateSoalBaru() }

override fun onNothingSelected(parent: AdapterView<*>) {}

} private fun generateSoalBaru() { angka1 = Random.nextInt(1, 20) angka2 = Random.nextInt(1, 20)

when (operasi) {
    "Penjumlahan" -> soalText.text = "Berapakah $angka1 + $angka2?"
    "Pengurangan" -> soalText.text = "Berapakah $angka1 - $angka2?"
    "Perkalian" -> soalText.text = "Berapakah $angka1 × $angka2?"
    "Pembagian" -> {
        angka1 *= angka2  // agar hasilnya bilangan bulat
        soalText.text = "Berapakah $angka1 ÷ $angka2?"
    }
}

} val jawaban = inputJawaban.text.toString().toInt() val hasil = when (operasi) { "Penjumlahan" -> angka1 + angka2 "Pengurangan" -> angka1 - angka2 "Perkalian" -> angka1 * angka2 "Pembagian" -> angka1 / angka2 else -> 0 }