题目描述

Given an absolute path for a file (Unix-style), simplify it.

For example,

path ="/home/", =>"/home"

path ="/a/./b/../../c/", =>"/c"

Corner Cases:

 

• Did you consider the case where path ="/../"?
  In this case, you should return"/".
• Another corner case is the path might contain multiple slashes'/'together, such as"/home//foo/".
  In this case, you should ignore redundant slashes and return"/home/foo".

 

记住stringstream以及getline函数的作用

class Solution {public:    string simplifyPath(string path) {        vector
      
        str;        stringstream ss(path);        string sub;        while(getline(ss,sub,'/'))        {            if(sub=="."||sub=="")                continue;            if(sub==".."&&str.size())                str.pop_back();            if(sub!="..")                str.push_back(sub);        }        string res;        for(string s:str)            res+="/"+s;        if(res.empty())            res+="/";        return res;    }};