#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int a[11][11],n;
	cin>>n;
	a[1][1]=1;
	for (int i=2; i<=n; ++i)	
	{
		a[i][1]=1;
		a[i][i]=1;	  	
		for (int j=2; j<=i-1; ++j)
			a[i][j]=a[i-1][j-1]+a[i-1][j];  
	}
	for (int i=1; i<=n; i++)
	{
	if (i!=n) cout<<setw(30-3*i);	
	for (int j=1; j<=i; j++) cout<<setw(6)<<a[i][j];
	cout<<endl;        
	}
	return 0;
} 

怎么错了？