class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val stateFlow = MutableStateFlow(State(0, 0))
        setContent {
            MyComposeTheme {
                val state by stateFlow.collectAsState()

                Column() {
                    FirstButton(
                        text = state.firstNumber.toString()
                    ) {
                        stateFlow.value = stateFlow.value.copy(firstNumber = Random.nextInt())
                    }

                    SecondButton(
                        text = state.secondNumber.toString()
                    ) {
                        stateFlow.value = stateFlow.value.copy(secondNumber = Random.nextInt())
                    }
                }

            }
        }
    }
}

@Composable
private fun FirstButton(
    text: String,
    onClick: () -> Unit
) {
    Button(
        onClick = onClick
    ) {
        Text(text = text)
    }
}

@Composable
private fun SecondButton(
    text: String,
    onClick: () -> Unit
) {
    Button(
        onClick = onClick
    ) {
        Text(text = text)
    }
}

data class State(
    val firstNumber: Int,
    val secondNumber: Int
)