22. 字符串练习

1、判断回文字符串

 1     class Program
 2     {
 3         /// <summary>
 4         /// 反转字符串
 5         /// </summary>
 6         /// <param name="strOrignial">原字符串</param>
 7         /// <returns>反转之后的字符串</returns>
 8         private string RverseString(string strOrignial)
 9         {
10             string strResult = null;
11             for (int i = strOrignial.Length-1; i >= 0; i--)
12             {
13                 string strTemp = strOrignial.Substring(i, 1);
14                 strResult = strResult + strTemp;//字符串累加
15             }
16             return strResult;
17         }
18         //判断是否是回文字符串（如：rotor）
19         private void Text()
20         {
21             string strOrstr = "rotor";
22             string strRverseResult = RverseString(strOrstr);
23             if (strRverseResult==strOrstr)
24             {
25                 Console.WriteLine("是回文字符串");
26             }
27             else
28             {
29                 Console.WriteLine("不是回文字符串");
30             }
31         }
32         static void Main(string[] args)
33         {
34             Program p = new Program();
35             p.Text();
36             Console.ReadKey();
37         }
38     }

2、输出1-256的所有回文字符串

 1     class Program
 2     {
 3         /// <summary>
 4         /// 反转字符串
 5         /// </summary>
 6         /// <param name="strOrignial">原字符串</param>
 7         /// <returns>反转之后的字符串</returns>
 8         private string RverseString(string strOrignial)
 9         {
10             string strResult = null;
11             for (int i = strOrignial.Length-1; i >= 0; i--)
12             {
13                 string strTemp = strOrignial.Substring(i, 1);
14                 strResult = strResult + strTemp;//字符串累加
15             }
16             return strResult;
17         }
18         //判断是否是回文字符串（如：rotor）
19         private bool Text( string strOrstr)
20         {
21             string strRverseResult = RverseString(strOrstr);
22             if (strRverseResult==strOrstr)
23             {
24                 return true;
25             }
26             else
27             {
28                 return false;
29             }
30         }
31         //输出1-256的所有回文字符串
32         private void Text1()
33         {
34             for (int i = 1; i < 257; i++)
35             {
36                 //判断i是否为回文字符串
37                 bool bb= Text(i.ToString());
38                 if (bb)
39                 {
40                     Console.WriteLine(i);
41                 }
42             }
43         }
44         static void Main(string[] args)
45         {
46             Program p = new Program();
47             p.Text1();
48             Console.ReadKey();
49         }
50     }

 

posted @ 2017-10-05 18:09  LiuChangwei  阅读(232)  评论(0)    收藏  举报