关于数组的排序问题

Question

static void Main(string[] args)
        {
            string[] arr = { "100-121",,"100-122""1000-210","101-212","101-121","1340-123","1340-223"};
        }
给出所写数组.给这个数组排序..最后结果为：
100-121
100-122
101-121
101-212
1000-210
1340-123
1340-223这个为排序后的结果.谢谢.急用.

Answer 1

--> 测试数据: #A
if object_id('tempdb.dbo.#A') is not null drop table #A
create table #A (A varchar(8))
insert into #A
select '100-121' union all
select '100-122' union all
select '1000-210' union all
select '101-212' union all
select '101-121' union all
select '1340-123' union all
select '1340-223'select * from #A ORDER BY LEFT(A,CHARINDEX('-',A)-1)*1,RIGHT(A,LEN(A)-CHARINDEX('-',A))*1
/*（所影响的行数为 7 行）A        
-------- 
100-121
100-122
101-121
101-212
1000-210
1340-123
1340-223（所影响的行数为 7 行）给你整个SQL,不过思想应该相同,转成INT来比较

Answer 2

var result=(from a in arr select a ).OrderBy(a=>Convert.Toint16(a.Substring(0,a.IndexOf("-"))))

Answer 3

+1string[] arr = { "100-121","100-122","1000-210","101-212","101-121","1340-123","1340-223"};
arr = arr.OrderBy(s=>int.Parse(s.Replace("-",""))).ToArray();

Answer 4

string[] arr = { "100-121","100-122","1000-210","101-212","101-121","1340-123","1340-223"};
            int[] array=new int[arr.Length];
            string sep="-";
            int i;
            for (i = 0; i < arr.Length; i++)
            {
                arr[i] = arr[i].Replace(sep, "");
                //Console.WriteLine(arr[i]);
                array[i]=System.Convert.ToInt32(arr[i]);
                Console.WriteLine(arr[i]);
            }
接下来比较大小，自己写了！
将"-"在插回原来的位置，有个函数insert(int startIndex,string value);

Answer 5

lz的测试数据有问题，我故意增加了最后两组数据，可以更多地看出问题所在：//由于问题没有说清楚，这里假设都并且只有一个-号（其实这个不太真实合用的）。
string[] arr = { "100-121", "100-122", "1000-210", "101-212", "101-121", "1340-123", "1340-223", "134-110", "134-111" };
var result = (from a in arr
                let pos = a.IndexOf('-')
                let left = int.Parse(a.Substring(0, pos))
                let right = int.Parse(a.Substring(pos + 1))
                orderby left, right
                select a).ToArray();

Answer 6

string[] arr = { "100-121","100-122","1000-210","101-212","101-121","1340-123","1340-223"};
            
            for (int i = 0; i < arr.Length; i++)
            {
                for (int j = i + 1; j < arr.Length;j++ )
                {
                    int num1 = Convert.ToInt32(arr[i].ToString().Replace("-",""));
                    int num2 = Convert.ToInt32(arr[j].ToString().Replace("-",""));
                    if (num1 > num2)
                    {
                        string str = arr[i];
                        arr[i] = arr[j];
                        arr[j] = str;
                    }
                }
            }

Answer 7

方法 一
using System;
using System.Collections.Generic;public class MyClass
{
public static void Main()
{
 string[] arr = { "100-121","100-122","1000-210","101-212","101-121","1340-123","1340-223"};
        string temp="";
int tmp;
int[] arr1=new int[arr.Length];
int i=0;
foreach(string s in arr)
{
   arr1[i++]=Convert.ToInt32(s.Split('-')[0]);
}
///冒泡泡
for(i=0;i<arr1.Length;i++)
{
for(int j=i;j<arr1.Length-1;j++)
{
if(arr1[i]>arr1[i+1])
{
tmp=arr1[i];
arr1[i]=arr1[i+1];
arr1[i+1]=tmp;

temp=arr[i];  //这块把实际数组排序了
arr[i]=arr[i+1];
arr[i+1]=temp;
}
}
}
foreach(string m in arr)
{
Console.WriteLine(m); 
}

Console.ReadKey(); 
}
}

Answer 8

public static void Main()
        {
            string[] arr = { "100-121", "100-122", "1000-210", "101-212", "101-121", "1340-123", "1340-223" };
            int tmp;
            int[,] arr1 = new int[arr.Length, 2];//定义个2维数组，一个放比较的值，一个放实际当前下标；
            int i = 0;
            foreach (string s in arr)
            {
                arr1[i, 0] = Convert.ToInt32(s.Split('-')[0]);
                arr1[i, 1] = i++;
            }
            ///冒泡泡
            for (i = 0; i < arr.Length; i++)  //可不是 arr1.Length  这块和下面都要注意
            {
                for (int j = i; j < arr.Length - 1; j++)
                {
                    if (arr1[i, 0] > arr1[i + 1, 0])
                    {
                        tmp = arr1[i, 0];
                        arr1[i, 0] = arr1[i + 1, 0];
                        arr1[i + 1, 0] = tmp;                        tmp = arr1[i, 1];                  //实际下标也排序
                        arr1[i, 1] = arr1[i + 1, 1];
                        arr1[i + 1, 1] = tmp;
                    }
                }
            }
            for (i = 0; i < arr.Length; i++)       //通过排序后的下标 显示arr 就ok 了
            {
                Console.WriteLine(arr[(arr1[i, 1])]);
            }            Console.ReadKey();
        }
多维数组有点生疏了

Answer 9

要不，把它封装到类中，实现Icomparable

Answer 10

上面两个 都错了 没考虑里面的大小，并且 冒泡里面 i应该是j, 修改了下
 public static void Main()
        {
            string[] arr = { "100-123", "100-122", "1000-210", "101-212", "101-121", "1340-1333", "1340-223" };
            int tmp;
            int[,] arr1 = new int[arr.Length, 3];//定义个2维数组，一个放比较的值，一个放实际当前下标；
            int i = 0;
            foreach (string s in arr)
            {
                arr1[i, 0] = Convert.ToInt32(s.Split('-')[0]);
                arr1[i, 1] = Convert.ToInt32(s.Split('-')[1]);
                arr1[i, 2] = i++;
            }
            ///冒泡泡
            for (i = 0; i < arr.Length; i++)
            {
                for (int j = i; j < arr.Length - 1; j++)
                {
                    if ((arr1[j, 0] > arr1[j+ 1, 0]) || ((arr1[j, 0] == arr1[j + 1, 0])&&(arr1[j, 1] > arr1[j+ 1, 1])))  //
                    {
                        tmp = arr1[j, 0];
                        arr1[j, 0] = arr1[j + 1, 0];
                        arr1[j + 1, 0] = tmp;                        tmp = arr1[j, 1];
                        arr1[j, 1] = arr1[j + 1, 1];
                        arr1[j + 1, 1] = tmp;                        tmp = arr1[j, 2];                  //实际下标也排序
                        arr1[j, 2] = arr1[j + 1, 2];
                        arr1[j + 1, 2] = tmp;
                    }
                }
            }
            for (i = 0; i < arr.Length; i++)       //通过排序后的下标 显示arr 就ok 了
            {
                Console.WriteLine(arr[(arr1[i, 2])]);
            }            Console.ReadKey();
        }

Answer 11

嗯，真的只有一个"-"么，那么：Convert.ToDouble(arr[i].Replace("-","."));就可以搞定了：）偷懒的办法