longestCommonPrefix-链接 实现的代码如下: 123456789101112131415161718192021class Solution {public: string longestCommonPrefix(vector<string>& strs) { string ans=""; if(strs.size()==0) return ans; char m; for(int i=0;i<strs[0].size();i++) { m=strs[0][i]; for(int j=1;j<strs.size();j++) { if(i>=strs[j].size()||m!=strs[j][i]) return ans; } ans+=m; } return ans; }};