粘墙“三角形”

#include <iostream>
using namespace std;
#include<iomanip>
int main() 
{ 	int n; 	
    char c; 
	while(cin>>n) 
{for(int i=1;i<=n;++i) 
	{if(i!=n) 	
	cout<<"a"<<setw(n-i)<<" "; 	
	else cout<<"a"; 	
	for(int j=1;j<=i;++j) 	
    {c=j+96; 	
	cout<<c;} 	
	cout<<endl; 	
  } 
 cout<<endl; 
 } 	
return 0; 
 }