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 i = 0;
int j = 0;
int a = 0;
int arr1[5] = { 1, 2, 3, 4, 5 };
int arr2[5] = { 2, 3, 4, 5, 6 };
int arr3[5] = { 0 };
for (a = 0; a <= 4; a++)
{
arr3[a] = arr1[a];
arr1[a] = arr2[a];
arr2[a] = arr3[a];
}
for (i = 0; i <= 4; i++)
{
printf("%d", arr1[i]);
}
printf("\n");
for (j = 0; j <= 4; j++)
{
printf("%d", arr2[j]);
}
getchar();
return 0;
}