在不使用内置函数和中间变量的情况交换数字LeetCode力扣题解面试题16.01

#异或法
#Kotlin

```Kotlin
class Solution {
    fun swapNumbers(numbers: IntArray): IntArray {
        numbers[0] = numbers[0] xor numbers[1]
        numbers[1] = numbers[1] xor numbers[0]
        numbers[0] = numbers[0] xor numbers[1]
        return numbers
　　}
}
```
#Java

class Solution {
public int[] swapNumbers(int[] numbers) {
        numbers[0]^=numbers[1];
        numbers[1]^=numbers[0];
        numbers[0]^=numbers[1];
        return numbers;
　　}
}

#Scala

object Solution {
def swapNumbers(numbers: Array[Int]): Array[Int] = {
    numbers(0)^= numbers(1)
    numbers(1)^= numbers(0)
    numbers(0)^= numbers(1)
    numbers
　　}
}　　

#C

int* swapNumbers(int* numbers, int numbersSize, int* returnSize)
{

     *returnSize=2;

      numbers[0]^=numbers[1];

      numbers[1]^=numbers[0];

      numbers[0]^=numbers[1];

      return numbers;

}

#Rust

````Rust
impl Solution {
pub fn swap_numbers(mut numbers: Vec<i32>) -> Vec<i32> {
        numbers[0] ^= numbers[1];
        numbers[1] ^= numbers[0];
        numbers[0] ^= numbers[1];
        numbers
　　}
}
````
加减法
#Kotlin
```Kotlin
class Solution {
fun swapNumbers(numbers: IntArray): IntArray {

        numbers[0] = numbers[0] -numbers[1]
        numbers[1] = numbers[1] +numbers[0]
        numbers[0] = numbers[0] -numbers[1]
        return numbers

　　}
}
```
#Java

class Solution {   
 public int[] swapNumbers(int[] numbers) {       
    numbers[0] = numbers[0] -numbers[1] ;      
    numbers[1] = numbers[1] +numbers[0] ;        
    numbers[0] = numbers[0] -numbers[1]  ;            
    return numbers;        
   }
 }

#Scala

object Solution { 
def swapNumbers(numbers: Array[Int]): Array[Int] = {    numbers(1) = numbers(1) - numbers(0)   
     numbers(0) = numbers(0) + numbers(1)    
     numbers(1) = numbers(0) - numbers(1)   
     numbers(0) = numbers(0) - numbers(1)   
     numbers  
  }
}　

#C
由于使用int取值范围会越界产生溢出,所以使用无符号类型
```C

/**incle * Note: The returned array must be malloced, assume caller calls free(). */
int* swapNumbers
(unsigned int* numbers, unsigned int numbersSize, int* returnSize)
{
    numbers[1] = numbers[1] - numbers[0];   
       numbers[0] = numbers[0] + numbers[1];     
       numbers[1] = numbers[0] - numbers[1];   
       *returnSize = 2;     
       return numbers;
}

#Rust
```Rust
impl Solution {
pub fn swap_numbers(numbers: Vec<i32>) -> Vec<i32> {
let mut numbers = numbers;
          numbers[0] = numbers[0] + numbers[1];
          numbers[1] = numbers[0] - numbers[1];
          numbers[0] = numbers[0] - numbers[1];
          numbers
　　}
}
```

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原文链接：https://blog.csdn.net/weixin_46059871/article/details/134399399