冯晟轩题解
空心正方形图案
http://www.nowcoder.com/questionTerminal/72347ee949dc47399186ee183632f303
include<bits/stdc++.h>
using namespace std;
int main()
{
int n;
while(cin>>n)
{ for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
if(j==0||j==n-1) cout<<"* ";
else if(i==n-1||i==0) cout<<"* ";
else cout<<" ";
}
cout<<endl;
}
}
return 0;
}