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add comment about istringstream

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ShusenTang 2020-06-22 17:51:57 +08:00 committed by GitHub
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solutions/71. Simplify Path.md
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@ -32,7 +32,7 @@ istream& getline (istream&& is, string& str);
``` ```
函数的变量： 函数的变量：
``` ```
is ：表示一个输入流，例如cin。本题我们用到的是stringstream。 is ：表示一个输入流，例如cin。本题我们用到的是stringstream或者istringstream。
str ：string类型的引用，用来存储输入流中的流信息。 str ：string类型的引用，用来存储输入流中的流信息。
delim ：char类型的变量，所设置的截断字符；在不自定义设置的情况下，遇到’\n’，则终止输入。 delim ：char类型的变量，所设置的截断字符；在不自定义设置的情况下，遇到’\n’，则终止输入。
``` ```
@ -78,7 +78,7 @@ public:
string simplifyPath(string path) { string simplifyPath(string path) {
string res, tmp; string res, tmp;
vector<string> stk; vector<string> stk;
stringstream ss(path); stringstream ss(path); // or istringstream ss(path);
while(getline(ss,tmp,'/')) { while(getline(ss,tmp,'/')) {
if (tmp == "" or tmp == ".") continue; if (tmp == "" or tmp == ".") continue;
if (tmp == ".." and !stk.empty()) stk.pop_back(); if (tmp == ".." and !stk.empty()) stk.pop_back();