/**

  * Created by root

  * Description :CallByValue:进入函数就得先计算实参的值；CallByName：函数体重使用到的时候才计算

  */

object CallByValueAndCallByName {

  def main(args: Array[String]): Unit = {

    val c = add(1+2,3)

    println(c)

    val c1 = add2(1+2,3)

    println(c1)

  }

  def add(x: Int, y: Int): Int = x + y

  def add2(x: => Int, y: Int) = x + y

}