C :

#include<stdio.h>
int main(){
   int a[10][10];
   int i,j,n;
   scanf("%d",&n);
   for(i = 0;i < n;i++){
   	  for(j = i;j < n;j++){
   	     a[i][j] = i + 1;
   	     a[j][i] = i + 1;
	  }
   }
   
   for(i = 0;i < n;i++){
   	  for(j = 0;j < n;j++){
   	     printf("%3d",a[i][j]);
	  }
	  printf("\n");
   }
   
   return 0;
}

C++ :

#include<iostream>
#include<iomanip>
using namespace std;

int main(){
 			int n;
            int a[11][11];
			cin>>n;
             for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                   
                    if (i<=j)
                    {
                        a[i][j] = i+1;
                    }
                    else
                    {  
                        a[i][j] =j+1;
                    }
                }
            }

            for (int i = 0; i < n; i++)
            {
              
                for (int j = 0; j < n; j++)
                {
                     cout<<setw(3)<<a[i][j];
                }
               cout<<endl;
            }


}

Python :

def getList(m,n):
    '''
      m 行数
      n 列数
      返回的是m行n列的二维数组，默认值为0
    '''
    ma = [ [0 for i in range(n)] for i in range(m) ]
    return ma

def printList(arr):
    for i in arr:
        for j in i:
            print('%3d' %(j) ,end='')
        print();

n = int( input() );
a = getList(n,n)
for i in range(0,n):
    for j in range(i,n):
        a[i][j] = i + 1;
        a[j][i] = a[i][j]
        
printList(a)