getline()与cin.getline()

高手戏玩c++ [转] - FongLuo - C++博客
getline(ifs, input); 不仅简单,而且安全,因为全局函数 getline 会帮你处理缓冲区用完之类的麻烦,如果你不希望空间...getline(cin, s, ';'); while ( s != "quit" ) { cout << s << endl; getline(cin, s, ';');...
https://www.360docs.net/doc/9c3374768.html,/FongLuo/archive/2008/05/1 ... 70K 2008-5-27 - 百度快照



basic_istream::ignore

Causes a number of elements to be skipped from the current read position.

Copy Codebasic_istream& ignore(
streamsize _Count = 1,
int_type _Delim = traits_type::eof( )
);

所以cin.ignore()就是跳过一个输入缓存中的元素；


而getline 是一个全局函数，

getline
Extract strings from the input stream line-by-line.

template
basic_istream& getline(
basic_istream& _Istr,
basic_string& _Str
);

template
basic_istream& getline(
basic_istream& _Istr,
basic_string& _Str,
CharType _Delim
);
Parameter
_Istr
The input stream from which a string is to be extracted.
_Str
The string into which are read the characters from the input stream.
_Delim
The line delimiter.
Return Value
The first function returns getline( _Istr, _Str, _Istr.widen( '\n' ) ).

The second function replaces the sequence controlled by _Str with a sequence of elements extracted from the stream _Istr.

这个程序的意思就是从标准输入设备读取一行到string s中