Spark记录-Scala记录（基础程序例子）

Posted 2020-10-15 信方互联网硬汉

import scala.util.control._
object learnning {
  def main(args:Array[String]):Unit={
    val n:Int=10
    println("第"+n+"个月兔子总数为"+fun(n))
    val n1:Int=1
    val n2:Int=100
    var count:Int=0
    //统计素数个数
    for(i:Int<-n1 until n2){
      if(isPrime(i)){
        count=count+1;
        System.out.print(i+" ");
        if(count%10==0){
          println();
        }
      }
    }
    println();
    println("在"+n1+"和"+n2+"之间共有"+count+"个素数");
    for(i:Int<- 100 until 1000){
      if(isLotus(i))
        print(i+" ");
    }
      println();
    val n3:Int=90;
    decompose(n3);
    System.out.println("请输入成绩");
    var content:Int = Console.readLine().toInt
    grade(content);
   println("请输入第一个数");
    var n6:Int = Console.readLine().toInt
    println("请输入第二个数");
    var n7:Int = Console.readLine().toInt
    max_min(n6,n7);
    System.out.print("请输入一串字符：");
    var str:String = Console.readLine().toString
    countstring(str);
  }
  private  def fun(n:Int):Int={
    if(n==1 || n==2)
      return 1;
    else
      return fun(n-1)+fun(n-2);
  }
  //判断素数
  private def isPrime(n:Int):Boolean={
    var flag:Boolean = true;
    if(n==1)
      flag = false;
    else {
      val loop = new Breaks;
      loop.breakable {
        for (i:Int<- 2 to Math.sqrt(n).toInt) {
          if ((n % i) == 0 || n == 1) {
            flag = false;
            loop.break()
          }
          else
            flag = true;
        }
      }
    }
    return flag;
  }
  //判断水仙花数
  private def isLotus(lotus:Int):Boolean={
    var m:Int = 0;
    var n:Int = lotus;
    var sum:Int = 0;
    m = n/100;
    n  -= m*100;
    sum = m*m*m;
    m = n/10;
    n -= m*10;
    sum += m*m*m + n*n*n;
    if(sum==lotus)
      return true;
    else
      return false;
  }
  private def decompose(n:Int):Unit={
     print(n+"=");
    var n4:Int=n;
    val loop = new Breaks;
    loop.breakable {
      for (i <- 2 until n4 + 1) {
        while (n4 % i == 0 && n4 != i) {
          n4 /=i;
          print(i + "*");
        }
        if (n4 == i) {
          println(i);
          loop.break();
        }
      }
    }
  }
  //成绩等级计算
  private def grade(n:Int):Unit={
    if(n>100 || n<0)
      System.out.println("输入无效");
    else{
      var str:String = if(n>=90)"分，属于A等" else "属于B等";
      System.out.println(n+str);
    }
  }
  //求最大公约数和最小公倍数
  private def max_min(m:Int,n:Int){
    var temp:Int = 1;
    var yshu:Int = 1;
    var bshu:Int = m*n;
    var m1:Int=m;
    var n1:Int=n;
    if(n1<m1){
      temp = n1;
      n1 = m1;
      m1 = temp;
    }
    while(m1!=0){
      temp = n1%m1;
      n1 = m1;
      m1 = temp;
    }
    yshu = n1;
    bshu /= n1;
    System.out.println(m+"和"+n+"的最大公约数为"+yshu);
    System.out.println(m+"和"+n+"的最小公倍数为"+bshu);
  }
  //统计输入的字符数
  private def countstring(str:String):Unit= {
    val E1: String = "[\u4e00-\u9fa5]";
    //汉字
    val E2: String = "[a-zA-Z]";
    val E3: String = "[0-9]";
    val E4: String = "\\s";
    //空格
    var countChinese: Int = 0;
    var countLetter: Int = 0;
    var countNumber: Int = 0;
    var countSpace: Int = 0;
    var countOther: Int = 0;
    var array_Char = str.toCharArray();
    //将字符串转化为字符数组
    var n: Int = array_Char.length;
    var array_String=new  Array[String](n); //汉字只能作为字符串处理
    for (i: Int <- 0 until array_Char.length) {
      array_String(i)= array_Char(i).toString();
      //遍历字符串数组中的元素
      for (s <- array_String) {
        if (s.matches(E1)) {
          countChinese = countChinese + 1;
        }
        else if (s.matches(E2)) {
          countLetter = countLetter + 1;
        }
        else if (s.matches(E3)) {
          countNumber = countNumber + 1;
        }
        else if (s.matches(E4)) {
          countSpace = countSpace + 1;
        }
        else {
          countOther = countOther + 1;
        }
      }
      System.out.println("输入的汉字个数：" + countChinese);
      System.out.println("输入的字母个数：" + countLetter);
      System.out.println("输入的数字个数：" + countNumber);
      System.out.println("输入的空格个数：" + countSpace);
      System.out.println("输入的其它字符个数：" + countSpace);
    }
  }
}