Kotlin 程序来交换两个数字

在本文中，我们将了解如何在 Kotlin 中交换两个数字。这是通过使用临时变量完成的。

以下是同样的演示

假设我们的输入是

val1 : 45
val2 : 60

所需的输出为

val1 : 60
val2 : 45

算法

  • 步骤 1 − 开始

  • 步骤 2 − 声明三个整数：val1、val2 和 tempVal

  • 步骤 3 − 定义值

  • 步骤 4 − 将 val1 分配给临时变量

  • 步骤 5 − 将 val2 分配给 val1

  • 步骤 6 − 将临时 tempVal 变量分配给 val2

  • 步骤 7 − 显示这两个值

  • 步骤 8 − 停止

示例 1

在本示例中，我们将使用临时变量来交换两个数字 −

Open Compiler
fun main() {
   var val1 = 45
   var val2 = 60

   println("The first value is defined as: $val1")
   println("The second value is defined as: $val2")

   val tempVal = val1
   val1 = val2
   val2 = tempVal

   println("After swapping")
   println("The first value is = $val1")
   println("The second value is = $val2")
}

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输出

The first value is defined as: 45
The second value is defined as: 60

After swapping
The first value is = 60
The second value is = 45

示例 2

在本示例中，我们将交换两个数字，不使用临时变量 −

Open Compiler
fun main() {
   var val1 = 25
   var val2 = 55
   
   println("The first value is defined as: $val1")
   println("The second value is defined as: $val2")

   val1 = val1 + val2
   val2 = val1 - val2
   val1 = val1 - val2

   println("After swapping")
   println("The first value is = $val1")
   println("The second value is = $val2")
}

输出

The first value is defined as: 25
The second value is defined as: 55

After swapping
The first value is = 55
The second value is = 25

示例 3

我们还可以使用以下代码交换两个数字

Open Compiler
fun main() {
   var val1 = 20
   var val2 = 10

   println("The first value is defined as: $val1")
   println("The second value is defined as: $val2")

   val1 = val1 - val2
   val2 = val1 + val2
   val1 = val2 - val1

   println("After swapping")
   println("The first value is = $val1")
   println("The second value is = $val2")
}

输出

The first value is defined as: 20
The second value is defined as: 10

After swapping

The first value is = 10
The second value is = 20

更新于： 2022-10-13

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