循环左移字符例如：abcde循环左移2个字符就是cdeab

复制代码 代码如下:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace 循环左移

{

class Program

{

static string reverse( char[] char2, int i, int j)

{

for (int begin=i,end=j;begin < end; begin++, end--)

{

char temp = char2[begin];

char2[begin] = char2[end];

char2[end] = temp;

}

return new String(char2);

}

static string leftshift( string str,int i ,int j)

{

char[] char1 = str.ToCharArray();

reverse( char1,0,i-1);

reverse( char1,i,j-1);

reverse( char1, 0, j - 1);

return new String(char1);

}

static void Main(string[] args)

{

Console.WriteLine("请输入一个字符串：");

string mystring = Convert.ToString(Console.ReadLine());

int length = mystring.Length;

Console.WriteLine("请输入你要左移的位数，不要超过字符串长度"+length);

int N = Convert.ToInt32(Console.ReadLine());

String str=leftshift(mystring, N, length);

Console.WriteLine(str);

Console.WriteLine();

Console.ReadKey();

}

}

}