循环问题~~

Question

1,2,3,4,5,6,7,8用C#把他排列成
1，2，3
1，2，3
1，2请问怎么实现？

Answer 1

是这样把
string[] _Value = "1,2,3,4,5,6,7,8".Split(',');            StringBuilder _TextBuilder = new StringBuilder();            int _Count = 0;
            for (int i = 0; i != _Value.Length; i++)
            {
                if (_Count != 2)
                {
                    _TextBuilder.Append(_Value[i]);
                    if (i != _Value.Length - 1) _TextBuilder.Append(',');
                    _Count++;
                }
                else
                {
                    _TextBuilder.AppendLine(_Value[i].ToString());
                    _Count = 0;
                }
            }
            MessageBox.Show(_TextBuilder.ToString());

Answer 2

            int k = 1;
            for (int i = 0; i < 10; i++)
            {
                if (k == 4)
                {
                    Console.WriteLine("");
                    k = 1;
                }
                else
                {
                        Console.Write(k+++" ");
                }
            }
            Console.ReadLine();
这样是可以做到吧

Answer 3

                String[] mystr = "1,2,3,4,5,6,7,8".Split(',');
                foreach (string s in mystr)
                {
                    if (int.Parse(s) % 3 != 0)
                    {                        Console.Write(s.ToString() + ',');
                    }
                    if(int.Parse ( s )% 3 ==0)
                    {
                        Console.WriteLine(s.ToString ());
                    }
                }

Answer 4

            int[] myarr = new int[] { 1,2,3,4,5,6,7,8,9};
            int k = 1;
            for (int i = 0; i < myarr.Length+1; i++)
            {
                if (k == 4)
                {
                    Console.WriteLine("");
                    k = 1;
                }
                else
                {
                    Console.Write(k++ + "");
                }
            }
            Console.ReadLine();
你运行一下吧。我这里可以的。

Answer 5

 string[] mystr = new string[] { "1", "2", "3", "4", "5", "6", "7", "8" };
            int num = mystr.Length;
            while (num > 0)
            {
                if (num >= 3)
                {
                    Console.WriteLine("1,2,3");
                }
                else
                {
                    string temp = "";
                    for (int index = 1; index <= num; index++)
                    {
                        temp += index.ToString() + ",";
                    }
                    temp = temp.Substring(0, temp.Length - 1);
                    Console.WriteLine(temp);
                    
                }
                num -= 3;
            }