fork download
copy 
  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4.  
  5. int main() {
  6.  
  7.         int n ; cin >> n ;
  8.         int a[n][n]={};
  9.         int i=0,j=0,p=1; int u=0,d=n-1,l=0,r=n-1;
  10.  
  11.         while ( p <= n*n ){
  12.             for (  i = l ; i<= r ; i++ ) {
  13.                 a[u][i] = p;
  14.                 p++;
  15.             }
  16.             u++ ;
  17.  
  18.             for ( i = u ; i <= d ; i++){
  19.                 a[i][r] = p;
  20.                 p++;
  21.             }
  22.             r--;
  23.  
  24.             for ( i = r ; i >= l ; i--) {
  25.                 a[d][i]= p;
  26.                 p++;
  27.             }
  28.             d-- ;
  29.             for ( i = d; i >= u ; i--) {
  30.                 a[i][l]= p ;
  31.                 p++;
  32.             }
  33.             l++;
  34.         }
  35.        for ( i = 0 ; i < n ; i++) {
  36.             for ( j = 0 ; j < n ; j ++) cout << a[i][j] << ' ';
  37.             cout << endl ;
  38.         } 
  39.  
  40.  
  41.  
  42.     }
  43.  
  44.  
  45.  
Success #stdin #stdout 0s 4356KB
comments (?)
stdin
copy 
2
stdout
copy 
1 2 
4 3
https://ideone.com/I2yUkJ
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!