09.变量声明中的模式匹配

case class Person(name: String, age: Int)
object demo {
    def main(args: Array[String]): Unit = {
        val (x, y) = (1, 2)
        println(s"x=$x,y=$y")
        val Array(first, second, _*) = Array(1, 7, 2, 9)
        println(s"first=$first,second=$second")
        val Person(name, age) = Person1("zhangsan", 16)
        println(s"name=$name,age=$age")
    }
}