数组的逆转

#include <iostream>
using namespace std;

typedef int datatype;

int main()
{
	int i,n,j;
	cout << "please input LA length：";
	cin >> n;
	datatype a[n] = {0};
	datatype t;
	
	for (i = 0;i < n;i++)
		cin >> a[i]; 
	
	for (i = 0,j = n-1;i < j;i++,j--)
		{
			t = a[j];
			a[j] = a[i];
			a[i] = t;
		}
	
	for (i = 0;i < n;i++)	
		cout << a[i]<<" ";
	
}