计算每个同学总分和平均分

 

package com.test_32
//1，迭代器，跳过第一个元素
import scala.collection.mutable.ListBuffer
import scala.io.Source
//成绩分析
case class Student(name:String,yumen:Int,shuxue:Int,yinyu:Int,total:Int,avg:Int)
object test1 {
  def main(args: Array[String]): Unit = {
    //读入成绩-按行去读取-跳过第一个元素
    val list=ListBuffer[Student]()
    val it = Source.fromFile("score.txt").getLines().drop(1)
    var shuxuezongfen=0
    while (it.hasNext) {
      val content = it.next()
      //使用中文的逗号去拆分字符串
      var arr = content.split("，")
      val name=arr(0)
      val yuwen=arr(1).toInt
      val shuxue=arr(2).toInt
      val yingyu=arr(3).toInt
      val total=yuwen+shuxue+yingyu
      val avg=total/3
      shuxuezongfen+=shuxue
      //println("当前行是", name,yingyu,total,avg)
      list+=Student(name,yuwen,shuxue,yingyu,total,avg)
    }
    //数学平均分
    println("数学平均分",shuxuezongfen/list.length)
    //根据总分进行排序
    val orderList=list.sortWith((a,b)=>a.total>b.total).slice(0,3)
    //打印结果
    orderList.foreach(s=>println(s"姓名：${s.name},数学：${s.name},总分：${s.total}"))
    orderList.foreach(s=>println(s"姓名:${s.name}，总分:${s.total}"))

  }
}