std::skipws, std::noskipws
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在头文件 <ios> 中定义
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std::ios_base& skipws( std::ios_base& str ); |
(1) | |
std::ios_base& noskipws( std::ios_base& str ); |
(2) | |
启用或禁用跳过前导空格的格式输入功能(默认情况下启用)。有没有对输出的影响.
1)
2)
原文:
Enables or disables skipping of leading whitespace by the formatted input functions (enabled by default). Has no effect on output.
跳过空白std::basic_istream::sentry的构造函数,读取并丢弃std::ctype流的一脉相承的语言环境方面的空白字符列为.
原文:
The whitespace skipping is performed by the constructor of std::basic_istream::sentry, which reads and discards the characters classified as whitespace by the std::ctype facet of the stream's imbued locale.
这是一个I / O操纵器,它可被称为与表达式如out << std::noskipws类型
out
任何std::basic_ostream,或与一个表达式如in >> std::noskipws类型in
任何std::basic_istream.原文:
This is an I/O manipulator, it may be called with an expression such as out << std::noskipws for any
out
of type std::basic_ostream or with an expression such as in >> std::noskipws for any in
of type std::basic_istream.目录 |
[编辑] 参数
str | - | 参考I / O流
|
[编辑] 返回值
str
(参考操作后到流)原文:
str
(reference to the stream after manipulation)[编辑] 示例
#include <iostream> #include <sstream> int main() { char c1, c2, c3; std::istringstream("a b c") >> c1 >> c2 >> c3; std::cout << "Default behavior: c1 = " << c1 << " c2 = " << c2 << " c3 = " << c3 << '\n'; std::istringstream("a b c") >> std::noskipws >> c1 >> c2 >> c3; std::cout << "noskipws behavior: c1 = " << c1 << " c2 = " << c2 << " c3 = " << c3 << '\n'; }
输出:
Default behavior: c1 = a c2 = b c3 = c noskipws behavior: c1 = a c2 = c3 = b
[编辑] 另请参阅
清除指定的ios_base标志 (函数) | |
设置指定的ios_base标志 (函数) |