代码：

int main() {
	int arr1[] = { 1,2,3,4,5 };
	int arr2[] = { 6,7,8,9,0 };
	int sz = sizeof(arr1) / sizeof(arr1[0]);
	int i  = 0;
	for (i = 0;i<sz; i ++ ) {
		int tmp = arr1[i];
		arr1[i] = arr2[i];
		arr2[i] = tmp;
	}

	for (i = 0; i < sz; i++) {
		printf("%d ", arr1[i]);
	}
	printf("\n");

	for (i = 0; i < sz; i++) {
		printf("%d ", arr2[i]);
	}
	printf("\n");
	return 0;
}

运行结果：