void SPIRAL(int nums[size][size])
{ 
    int iIndex, jIndex, n = 0;

    int *p=&nums[0][0];

   iIndex = jIndex = size / 2;

           while (n < size)
   {
      for (int a = 0; a < n; a++)
      {
          nums[iIndex++][jIndex] = *p++; //вверх
      }
      for (int a = 0; a < n; a++)
      {
         nums[iIndex][jIndex++] = *p++; //влево
      }
      n++;
      for (int a = 0; a < n; a++)
      {
         nums[iIndex--][jIndex]  = *p++; //вниз
      }
      for (int a = 0; a < n; a++)
      {
         nums[iIndex][jIndex--] = *p++; //вправо
      }
      n++;
   }

   for (int i = 0; i < size; i++)
   {
      for (int j = 0; j < size; j++)
      {
         cout << setw(4) << nums[i][j];
      }
   cout << endl;
   }
}