正则表达式

package imp

object imp01 {
//隐式  偷偷地
  implicit def double2Int(d:Double):Int = {
    println("double2Int被调用了...")
    d.toInt
  }

  def main(args: Array[String]): Unit = {
    //不能吧Double类型 保存到Int。这样会有损失，不会自动转换
    var i:Int = 1.1
    //可以把int类型保存到Double，会自动转换
    var d:Double = 1
  }
}

object imp02 {
  class MY(var value:Double) {
   override def toString:String = s"${value}美元"
  }
  class RMB(var value:Double) {
    override def toString: String = s"${value}人民币"
  }

  implicit def my2rmb(my:MY):RMB = {
    new RMB(my.value * 6.9)
  }
  implicit def rmb2my(my:MY):MY = {
    new MY(rmb.value * 0.14)
  }
  def main(args: Array[String]): Unit = {
    val m1:RMB = new MY(100)
    println(m1)
    val my1:MY = new RMB(1000)
    println(my1)
  }
}