参考文献

C++ 代码

#include<bits/stdc++.h>
using namespace std;
int n,i,j;
int main()
{
    while(cin>>n){
        if(n==0)break;
        for(i=1;i<=n;i++){
            for(j=1;j<=n;j++)
                cout<<min(min(i,j),min(n-i+1,n-j+1))<<' ';
            cout<<endl;
        }   
        cout<<endl;
    }
}