import junit.framework.TestCase

import scala.util.control.Breaks._

//流程控制语句

//关键字 if else match

class Demo4 extends TestCase {

  //规则1 if else 有返回值,取最后的值

  //规则2 默认返回的值,当值没有设置时,用()代替

  //规则3 java中的switch没有出现,被scala中的 match代替了,该match允许在匹配值期间,做相关配合运算

  // if else

  def test_+ {

    val k1 = 105

    val k2 = 101

    println(if (k2 > k1) k2);

    println(if (k2 > k1) 100);

    println(if (k2 > k1) 100 else 101);

    val m1 = if (k1 == 105) {

      if (k2 == 101) 103 else 104

    } else if (k2 == 101) {

      200;

    } else {

      300;

    }

  }

  //switch

  def test_() {

    val k1 = 11;

    var result = 0;

    val m1 = k1 match {

      case 100 => result = 1056; "ABC";

      case 101 => result = 1001; "CBA";

      case _   => result = 1002; "CAB";

    }

    println(result);

    println(m1);

  }

  //for 循环

  def test_*() {

    //for(i < 1 to n ) println()

    // for(i <- 1 to 10)  print(i+",")

    var rs = 0

    for (i <- 1 to 10) {

      rs += i

    }

    rs = 0;

    //for循环 倒序

    for(i <- (1 to 5).reverse){print(i+" ")}

    for (i <- 1 to 3; j <- 1 to 3) {

      rs += (i * j)

    }

    for (i <- 1 to 10 if i != 5) {

      // println(i);

    }

    for (i <- 1 to 10 if i != 5; j <- 1 to 10 if j != 8) {

      //println(i*j);

    }

    for (i <- 1 to 10; from = i * 2; j <- 1 to from) {

      //println(j);

    }

  }

  //while 循环

  def test_/() {

    var rs = 0;

    var i = 0;

    while (i < 10) {

      i += 1;

      // println(i);

      rs += i;

    }

    //println(rs);

    rs = 0;

    i = 10;

    while (i > 0) {

      rs += i;

      i -= 1;

    }

    println(rs);

  }

  //break;countinue;

  def test_^() {

    var flag = true;

    for (i <- 1 to 10 if flag) {

        if (i == 5) {

            flag = false;

        }

      if(flag){

        //println(i);

      }

      flag = true;

    }

    breakable{

      for(i <- 1 to 5){

        if(i==4){

          break;

        }

        println(i);

      }

    }

  }

}