利用二进制模2杨辉三角求值，不知道为什么只对3个点，其余点提示超出输出限制，是因为行尾空格吗？

#include<iostream>
#include<algorithm>
using namespace std;
int n;
#define getit(A,i) ((A >> (i << 1)) & 3)
int main()
{
	cin >> n;
	unsigned long long  A = 1;
    n = 1 << n;
	for(int k = 1;k <= n;k++)
	{
		for(int i = 1;i <= n - k;i++)
			cout << " ";
		for(int i = 0;i < k;i++)
			if(getit(A,i) == 1)
				cout << "/\\  ";
			else if(getit(A,i) == 0)
				cout << "    ";
			else if(getit(A,i) == 3)
				cout << "/__\\";
		cout << endl;
		A = (A << 1) ^ A;
 	}
}