/**
 * 扩展函数
 */
data class User(var name:String){

    override fun toString(): String {
        return "User(name='$name')"
    }

}

fun User.print(){
    println("${name}")
}



fun main(arg:Array<String>){
    var user=User("轻语积累")
    user.print()
    println("${user.toString()}")
    
 }