LeetCode *** 71. Simplify Path （getline的使用）

题目：

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

For example,
path = "/home/", => "/home"
path = "/a/./b/../../c/", => "/c"

分析：

代码：

class Solution {public:    string simplifyPath(string path) {        string res="", tmp;        vector<string> stk;        stringstream sstm(path);                while(getline(sstm,tmp,'/')){            if(tmp==""||tmp==".")continue;            if(tmp==".."&&!stk.empty())stk.pop_back();            else if(tmp!="..")stk.push_back(tmp);        }        for(auto st:stk)res+="/"+st;        return res.empty()?"/":res;    }};