scala 标识符案例

发布时间：2020-12-16 08:55:39 所属栏目：安全来源：网络整理

导读：package com.youlangta.scalaTestclass Rational(n: Int,d: Int) { require(d != 0,"分母不能为0") private val g = gcd(n.abs,d.abs) val number: Int = n / g val denom: Int = d / g override def toString: String = number + "/" + denom def this(n: I

package com.youlangta.scalaTestclass Rational(n: Int,d: Int) {  require(d != 0,"分母不能为0")  private val g = gcd(n.abs,d.abs)  val number: Int = n / g  val denom: Int = d / g  override def toString: String = number + "/" + denom  def this(n: Int) = this(n,1)  def +(that: Rational): Rational = {    new Rational(      number * that.denom + that.number * denom,denom * that.denom    )  }  def +(i: Int): Rational = {    new Rational(      number + i * denom,denom    )  }  def -(that: Rational): Rational = {    new Rational(      number * that.denom - that.number * denom,denom * that.denom    )  }  def -(i: Int): Rational = {    new Rational(      number - i * denom,denom    )  }  def *(that: Rational): Rational = {    new Rational(      number * that.number,denom * that.denom    )  }  def *(i: Int): Rational = {    new Rational(      number * i,denom    )  }  def /(that: Rational): Rational = {    new Rational(      number * that.denom,denom * that.number    )  }  def /(i: Int): Rational = {    new Rational(      number,denom * i    )  }  private def gcd(a: Int,b: Int): Int = {    if (b == 0) a else gcd(b,a % b)  }}

（编辑：李大同）

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