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Leetcode# 71 Simplify Path

原题地址

 

用栈保存化简后的路径。把原始路径根据"/"切分成若干小段,然后依次遍历

若当前小段是"..",弹栈

若当前小段是".",什么也不做

否则,入栈

 

代码:

 1 string simplifyPath(string path) { 2   vector<string> buffer; 3   char *tok = NULL; 4  5   tok = strtok((char *) path.c_str(), "/"); 6   while (tok) { 7     cout << tok << endl; 8     if (strcmp(tok, "..") == 0) { 9       if (!buffer.empty())10         buffer.pop_back();11     }12     else if (strcmp(tok, ".") != 0)13       buffer.push_back(string(tok));14     tok = strtok(NULL, "/");15   }16 17   string res;18   for (auto dir : buffer)19     res += "/" + dir;20   return buffer.empty() ? "/" : res;21 }

 

Leetcode# 71 Simplify Path