LeetCode Online Judge 题目C# 练习 - Longest Common Prefix

Write a function to find the longest common prefix string amongst an array of strings

 1         public static string LongestCommonPrefix(List<string> strs)
 2         {
 3             if (strs.Count == 0)
 4                 return "";
 5             if (strs.Count == 1)
 6                 return strs[0];
 7 
 8             bool bMatch = true;
 9             int index = 0;
10             string ret = "";
11 
12             while (bMatch)
13             {
14                 foreach (var item in strs)
15                 {
16                     if (index >= item.Length || item[index] != strs[0][index])
17                     {
18                         bMatch = false;
19                         return ret;
20                     }
21                 }
22 
23                 ret += strs[0][index];
24                 index++;
25             }
26 
27             return ret;
28         }

代码分析：

　　简单BF。