memmove函数

    int arr1[] = { 1,2,3,4,5,6,7,8,9,10 };
    memmove(arr1 + 3, arr1, 24);
	for (int i = 0; i < 10; i++)
	{
		printf("%d ",arr1[i]);//1 2 3 1 2 3 4 5 6 10
	}