int main()
{
	int i, j, k,m;
	int ex;
	int arr[20];
	cout<<"需要输入几个数？"endl;
	cin>>k;
	for (i = 0; i < k; i++)
	{
		cout << "please enter a number" << endl;
		cin >> arr[i];

	}
	for (i = 1; i < k; i++)
	{
		ex = arr[i];
		m = i;
		for (j = i - 1; j >= 0; j--)
		{

			if (arr[j] > ex)
			{
				swap(arr[j], arr[m]);
				ex = arr[j];
				m = j;
			}

		}
	}
	for (i = 0; i < k; i++)
	{
		cout << arr[i] << endl;
	}
}