problem:
Write a function to find the longest common prefix string amongst an array of strings.
寻找 0 ~n 个字符串的最长公共前缀
thinking:
(1)公共前缀非常好理解。按位匹配就可以
(2)非常easy忘记处理0、1个字符串的情况。
code:
string prefix(string &str1, string &str2) { string tmp; int i=0; while((i<str1.size())&&(i<str2.size())&&(str1.at(i)==str2.at(i))) { tmp.push_back(str1.at(i)); i++; } return tmp; } class Solution { public: string longestCommonPrefix(vector<string> &strs) { if(strs.size()==0) return ""; if(strs.size()==1) return strs.at(0); string result=prefix(strs.at(0),strs.at(1)); for(int i=1;i<strs.size();i++) { result=prefix(strs.at(i),result); } return result; } };
时间: 2024-10-20 10:45:55