2주차

 

 

 

import java.io.BufferedReader
import java.io.FileNotFoundException
import java.io.FileReader
import java.io.IOException

fun main(){
    try{
        //파일열기
        val reader = BufferedReader(
            FileReader("students.txt"))
        try{ //파일 읽고 등급확인하여출력
            val num = reader.readLine()!!.toInt()
            for(i in 1..num){
                val name=reader.readLine()
                val point=reader.readLine()!!.toInt()
                fun printgrade() {
                    val grade=when {
                        point == 0 -> "F"
                        /*point < 70 && point >= 60 -> "D" //untuio
                        point < 80 && point >= 70 -> "C"
                        point < 80 && point >= 90 -> "B"*/
                        point in 60 until 70 -> "D"
                        point in 70 until 80 -> "C"
                        point in 80 until 90 -> "B"
                        else -> "A"
                    }
                    println("${name} has grade ${grade}")
                }
                printgrade()
            }
        } catch (e: IOException){ //읽다가 에러
            println("File I/O Error")
        } finally{
            reader.close() //파일닫기
        }
    } catch (e: FileNotFoundException){
        println("File Not Found")
    } //열지도 못했으니 파일 닫을필요없음
}