Scala 学习笔记之函数(3)

class student{
  def sayHello(name: => String){
    println(s"Hello, $name, welcome $name")
  }
}

object FunctionDemo3 {
  def main(args: Array[String]): Unit = {
    val s = new student()
    def getSName(s: String): String = {println("call"); s}
    //传名参数
    s.sayHello("Sky")
    s.sayHello(getSName("Sky"))
  }
}

Hello, Sky, welcome Sky
call
call
Hello, Sky, welcome Sky