getline的几种用法

istream库下

istream& getline (char* s, streamsize n );
istream& getline (char* s, streamsize n, char delim );

从istream输入流中读取字符传入字符串s，个数为n

 

string库下

istream& getline (istream&  is, string& str, char delim);
istream& getline (istream&& is, string& str, char delim);
istream& getline (istream&  is, string& str);
istream& getline (istream&& is, string& str);

从is中读取一行传入字符串str，截至到字符delim