C :

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

C++ :

#include <bits/stdc++.h>
using namespace std;

int main(){
	int a[10][10];
    int i,j,n;
    cin>>n;
     
    for (i = 0;i < n;i++){
        for (j = 0;j < n - i;j++){
            if (n < i + j){
				a[i][j] = j + 2;
				a[n - j - 1][n - i - 1] = j + 2;
			}else{
				a[i][j] = n - i;
				a[n - j - 1][n - i - 1] = n - i;
			}
        }
    }
     
    for (i = 0;i < n;i++){
        for (j = 0;j < n;j++){
            cout<<setw(3)<<a[i][j];
        }
        cout<<endl;
    }
}

Python :

n = int(input())
a = [[0 for j in range(n)] for i in range(n)]

for i in range(n):
    # 先定好第一列数字
    a[i][0] = n - i
    for j in range(1, n - i):
        a[i][j] = a[i][j - 1]
    for j in range(n - i, n):
        a[i][j] = a[i][j - 1] + 1

for i in range(n):
    for j in range(n):
        print('%3d' % a[i][j], end='')
    print()