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  1. #include <iostream>
  2. #include <iomanip>
  3. using namespace std;
  4. int main()
  5. {
  6.     int arraysize;
  7.     cout<<"Size: ";
  8.     cin>>arraysize;
  9.     int a[arraysize][arraysize];
  10.     int couter = 1, stepTop = 0, stepLeft = 1, stepBottom = 0, stepRight = 1;
  11.     for(int iMain = 0; iMain < ((arraysize / 2) + 1); iMain++)
  12.     {
  13.         for(int i = stepTop; i < stepTop + 1; i++)
  14.         {
  15.             for(int j = stepTop; j < (arraysize - stepTop); j++)
  16.             {
  17.  
  18.                 a[i][j] = couter;
  19.                 couter++;
  20.             }
  21.  
  22.         }
  23.         stepTop++;
  24.  
  25.         if(iMain < (arraysize / 2))
  26.         {
  27.             for(int i = stepRight; i <= (arraysize - stepRight - 1); i++)
  28.             {
  29.                 for(int j = (arraysize - stepRight); j < (arraysize - stepRight + 1); j++)
  30.                 {
  31.                     a[i][j] = couter;
  32.                     couter++;
  33.                 }
  34.             }
  35.             stepRight++;
  36.  
  37.             for(int i = (arraysize - 1 - stepBottom); i >= (arraysize - stepBottom - 1); i--)
  38.             {
  39.                 for(int j = (arraysize - 1 - stepBottom); j >= stepBottom; j--)
  40.                 {
  41.                     a[i][j] = couter;
  42.                     couter++;
  43.                 }
  44.             }
  45.             stepBottom++;
  46.  
  47.             for(int i = (arraysize - stepLeft - 1); i >= stepLeft; i--)
  48.                 {
  49.                 for(int j = stepLeft-1; j < stepLeft; j++)
  50.                 {
  51.                     a[i][j] = couter;
  52.                     couter++;
  53.                 }
  54.             }
  55.             stepLeft++;
  56.         }
  57.     }
  58.  
  59.  
  60. for(int i = 0; i < arraysize; i++)
  61.     {
  62.         for(int j = 0; j < arraysize; j++)
  63.         {
  64.             cout<<setw(arraysize)<<a[i][j];
  65.             cout<<" ";
  66.         }
  67.         cout<<endl;
  68.     }
  69.  
  70.     return 0;
  71. }
Success #stdin #stdout 0s 3144KB
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stdin
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6
stdout
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Size:      1      2      3      4      5      6 
    20     21     22     23     24      7 
    19     32     33     34     25      8 
    18     31     36     35     26      9 
    17     30     29     28     27     10 
    16     15     14     13     12     11
https://ideone.com/kR8nOZ
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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