C++ 代码

#include <iostream>

using namespace std;

int main(){
    int n;
    while(scanf("%d",&n)){
        if(n==0)
            break;
        int a[n+2][n+2];

        for(int i=1;i<=n;i++){
            for(int j=0;j<=n-i;j++){
                a[1+j][i+j]=i;
                a[i+j][1+j]=i;
            }

        }

        for(int i=1;i<=n;i++){
            for(int j=1;j<=n;j++)
                cout << a[i][j] << " ";
            cout << "\n";
        }
        cout << "\n";

    }


    return 0;
}