package chapter1.demo3

object DemoOps {
  def main(args: Array[String]): Unit = {
    // 1. 算术运算符
    val result1: Int = 10 / 3 // 3
    println(s"result1 = ${result1}") //不能整除，取整数部分

    val result2: Double = 10 / 3
    println(s"result2 = ${result2}") // 两个整数做除法，结果也是整数，赋值给result2时，转成double 10/3 = 3 ==> 3.0

    val result3: Double = 10.0 / 3
    println(s"result3 = ${result3}") // double除以整型  10.0 / 3 ==> 10.0/3.0 ==> 3.33333

    val result4: Int = (+10) + (-3)
    println(s"result4 = ${result4}")

    // 2. 比较运算符
    val a1: Int = 10
    val b1: Int = 10
    println(s"a1==b1 = ${a1 == b1}")
    println(s"a1.equals(b1) = ${a1.equals(b1)}")
    println(s"a1!=b1 = ${a1 != b1}")
    println(s"a1>b1 = ${a1 > b1}")
    println(s"a1>=b1 = ${a1 >= b1}")


    // 3. 逻辑运算符
    val n = 1
    println((6 > 5) && (n > 0)) // true
    println((6 > 5) && (n < 0)) // false
    println((6 > 5) || (n > 0))
    println((6 > 5) || (n < 0))
    println(!((6 > 5) && (n > 0)))


    // 4. 赋值运算符
    var a = 10
    a += 1 // a = a + 1
    println(a)
    a -= 1
    a /= 1
    a %= 1

    a <<= 1 // a = a << 1

    a &= 1 // a = a & 1  // 按位与 运算
    a |= 1 // a = a | 1  // 按位或 运算
    a ^= 1 // a = a ^ 1   // 异或 运算


    val b = 10
    val c = b + a

    val d = b.+(a)
    // b.add(a)
    val e = b +(a)
    val f = b +a
  }
}