将数组A中的内容和数组B中的内容进行交换。（数组一样大）

#include<stdio.h>
int main()
{
int arr1[10]={1,2,3,4,5,6,7,8,9,10},arr2[10]={10,9,8,7,6,5,4,3,2,1},arr3[10];
int i;
for (i=0;i<sizeof(arr1)/sizeof(arr1[0]);i++)
{
arr3[i]=arr1[i];
arr1[i]=arr2[i];
arr2[i]=arr3[i];
}
for(i=0;i<sizeof(arr1)/sizeof(arr1[0]);i++)
{
printf("%d ",arr1[i]);
}
printf("\n");
for(i=0;i<sizeof(arr2)/sizeof(arr2[0]);i++)
{
printf("%d ",arr2[i]);
}
return 0;
}