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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     int n;
  8.     cin >> n;
  9.     int i = 1;
  10.     int j = n - 1;
  11.     int k = 0;
  12.     int a = 0;
  13.     int array[n][n];
  14.     while (i <= n*n)
  15.     {
  16.         array[k][k] = i;
  17.         i++;
  18.         array[k][n-k -1] = i;
  19.         i++;
  20.         array[n-k-1][n-k - 1 ] = i;
  21.         i++;
  22.         array[n-k-1][k] = i;
  23.         i++;
  24.         if (i > n*n)
  25.             break;
  26.         while (a < j - 1)
  27.         {
  28.             array[k][k + a + 1] = array[k][k + a] + 4;
  29.             a++;
  30.             i++;
  31.         }
  32.         a = 0;
  33.         while (a < j - 1)
  34.         {
  35.             array[k + a + 1][n-k-1] = array[k + a][n - k - 1] + 4;
  36.             a++;
  37.             i++;
  38.         }
  39.         a = 0;
  40.         while (a < j - 1)
  41.         {
  42.             array[n - k - 1][n - k - a - 2] = array[n - k - 1][n - k - a - 1] + 4;
  43.             a++;
  44.             i++;
  45.         }
  46.         a = 0;
  47.         while (a < j - 1)
  48.         {
  49.             array[n-k-a-2][k] = array[n-k-a-1][k] + 4;
  50.             a++;
  51.             i++;
  52.         }
  53.         a = 0;
  54.         k++;
  55.         j--;
  56.     }
  57.     k = 0;
  58.     j = 0;
  59.     while(k < n)
  60.     {
  61.         while(j < n)
  62.         {
  63.             cout << array[k][j] << " ";
  64.             j++;
  65.         }
  66.         k ++;
  67.         j = 0;
  68.         cout << endl;
  69.     }
  70.     return 0;
  71. }
  72.  
Runtime error #stdin #stdout 0s 3096KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/dWRhAa
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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