1回答

• 

  为栗子殉情的番茄酱

  2017-03-29 15:41:43

   for (int i = 0; i < 7; i++)
              {
                  for (int j = 0; j < 7; j++)
                  {
                      if (i == j||i+j==6)
                      {
                          Console.Write("O");
                      }
                      else
                      {
                          Console.Write(".");
                      }
                  }
                  Console.WriteLine();
              }

  
  

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