（C语言）创建临时变量/不创建临时变量实现交换两个数组内容

怼烎@ 2022-02-15 05:25 314阅读 0赞

#### 将数组 arr1 中内容和数组 arr2 中内容进行交换（大小一样） ####

**创建临时变量：**

#define _CRT_SECURE_NO_WARNINGS 1
    #include <stdio.h>
    #include <stdlib.h>
    #include <windows.h>
    int main()
    {
        
    	int arr1[1024] = {
         0 };
    	int arr2[1024] = {
         0 };
    	int i = 0;
    	int len = 0;
    	printf("输入数组的长度：");
    	scanf("%d", &len);
    	for (i = 0; i < len; i++)
    	{
        
    		printf("请输入数组arr1第%d个数：", i + 1);
    		scanf("%d", &arr1[i]);
    	}
    	for (i = 0; i < len; i++)
    	{
        
    		printf("请输入数组arr2第%d个数：", i + 1);
    		scanf("%d", &arr2[i]);
    	}
    	//数组交换
    	/*创建临时变量*/
    	for (i = 0; i < len; i++)
    	{
        
    		int temp = arr1[i];
    		arr1[i] = arr2[i];
    		arr2[i] = temp;
    	}
    	printf("new arr1 = [");
    	for (i = 0; i < len; i++)
    	{
        
    		printf(" %d ", arr1[i]);
    	}
    	printf("]\n");
    	printf("new arr2 = [");
    	for (i = 0; i < len; i++)
    	{
        
    		printf(" %d ", arr2[i]);
    	}
    	printf("]\n");
    	system("pause");
    	return 0;
    }

**不创建临时变量**

#define _CRT_SECURE_NO_WARNINGS 1
    #include <stdio.h>
    #include <stdlib.h>
    #include <windows.h>
    
    int main()
    {
        
    	int arr1[1024] = {
         0 };
    	int arr2[1024] = {
         0 };
    	int i = 0;
    	int len = 0;
    	printf("输入数组的长度：");
    	scanf("%d", &len);
    	for (i = 0; i < len; i++)
    	{
        
    		printf("请输入数组arr1第%d个数：", i + 1);
    		scanf("%d", &arr1[i]);
    	}
    	for (i = 0; i < len; i++)
    	{
        
    		printf("请输入数组arr2第%d个数：", i + 1);
    		scanf("%d", &arr2[i]);
    	}
    	//数组交换
    	//不创建临时变量
    	for (i = 0; i < len; i++)
    	{
        
    		arr1[i] = arr1[i] + arr2[i];
    		arr2[i] = arr1[i] - arr2[i];
    		arr1[i] = arr1[i] - arr2[i];
    	}
    	//异或方法
    	/*for (i = 0; i < len; i++){
    	arr1[i] = arr1[i]^arr2[i];
    	arr2[i] = arr1[i]^arr2[i];
    	arr1[i] = arr1[i]^arr2[i];
    	}*/
    	printf("new arr1 = [");
    	for (i = 0; i < len; i++)
    	{
        
    		printf(" %d ", arr1[i]);
    	}
    	printf("]\n");
    	printf("new arr2 = [");
    	for (i = 0; i < len; i++)
    	{
        
    		printf(" %d ", arr2[i]);
    	}
    	printf("]\n");
    	system("pause");
    	return 0;
    }

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