我对以下几行代码感到困惑:
class MainActivity : ComponentActivity() {
var item = "None"
var price: Double = 16.99
var Quantity: Int = 2
println(Calculate(price, item, Quantity))
}
fun Calculate(price: Double, item: String, Quantity: Int): Double {
return(Quantity*price)
}
您不能直接在类下添加语句,这些语句应该位于构造函数或方法内。例如: