Práctica: Conceptos básicos de Kotlin

kotlin_basics_20092024_2.kt

//solution completed: 
//https://developer.android.com/codelabs/basic-android-kotlin-compose-kotlin-fundamentals-practice-problems?hl=es-419&continue=https%3A%2F%2Fdeveloper.android.com%2Fcourses%2Fpathways%2Fandroid-basics-compose-unit-2-pathway-1%3Fhl%3Des-419%23codelab-https%3A%2F%2Fdeveloper.android.com%2Fcodelabs%2Fbasic-android-kotlin-compose-kotlin-fundamentals-practice-problems#8

fun main(){
    notifications()
    tycketCine()
    catalogSong()
}

//5. Catálogo de canciones
class Song(val title:String,val artist:String,val year:String,val count:Int){
    fun isPopular(){
        println("$title, interpretada por $artist, se lanzo en $year")
        if(count<1000){
            print(" es poco popular\n")
        }
        else{
            print(" es popular\n")
        }
    }
}
fun catalogSong(){
    Song("Jojo","Javier","1900",1000).isPopular()
    Song("Jao","Solis","1500",100).isPopular()
}

//3. Precio de la entrada de cine
//[start]
fun tycketCine() {
    val child = 5
    val adult = 28
    val senior = 87

    val isMonday = true

    println("The movie ticket price for a person aged $child is \$${ticketPrice(child, isMonday)}.")
    println("The movie ticket price for a person aged $adult is \$${ticketPrice(adult, isMonday)}.")
    println("The movie ticket price for a person aged $senior is \$${ticketPrice(senior, isMonday)}.")
}

fun ticketPrice(age: Int, isMonday: Boolean): Int {
    return when{
        age<12->15
        age>13 && age<60 && !isMonday->30
        age>13 && age<60 && isMonday->25
        age>=61 -> 20
        else -> -1
        
    }
}
//[end]


//2. Notificaciones móviles
//[start]
fun notifications() {
    val morningNotification = 51
    val eveningNotification = 135

    printNotificationSummary(morningNotification)
    printNotificationSummary(eveningNotification)
}
fun printNotificationSummary(numberOfMessages: Int) {
    if(numberOfMessages<100){
        println("You have $numberOfMessages notifications.")
    }
    else{
        println("Your phone is blowing up! You have 99+ notifications.")
    }
}
//[End]