| I/O manipulators | ||||
| Print functions(C++23) | ||||
| C-style I/O | ||||
| Buffers | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++20) | ||||
| Streams | ||||
| Abstractions | ||||
| File I/O | ||||
| String I/O | ||||
| Array I/O | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
| Synchronized Output | ||||
(C++20) | ||||
| Types | ||||
| Error category interface | ||||
(C++11) | ||||
(C++11) |
| Floating-point formatting | |||||||||||||||||||||||||||||||
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| Integer formatting | |||||||||||||||||||||||||||||||
| Boolean formatting | |||||||||||||||||||||||||||||||
| Field width and fill control | |||||||||||||||||||||||||||||||
| Other formatting | |||||||||||||||||||||||||||||||
| Whitespace processing | |||||||||||||||||||||||||||||||
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| Output flushing | |||||||||||||||||||||||||||||||
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| Status flags manipulation | |||||||||||||||||||||||||||||||
| Time and money I/O | |||||||||||||||||||||||||||||||
| Quoted manipulator | |||||||||||||||||||||||||||||||
(C++14) | |||||||||||||||||||||||||||||||
Defined in header <ios> | ||
std::ios_base& skipws(std::ios_base& str); | (1) | |
std::ios_base& noskipws(std::ios_base& str); | (2) | |
Enables or disables skipping of leading whitespace by the formatted input functions (enabled by default). Has no effect on output.
The whitespace skipping is performed by the constructor ofstd::basic_istream::sentry, which reads and discards the characters classified as whitespace by thestd::ctype facet of the stream's imbued locale.
This is an I/O manipulator, it may be called with an expression such asout<< std::noskipws for anyout of typestd::basic_ostream or with an expression such asin>> std::noskipws for anyin of typestd::basic_istream.
Contents |
| str | - | reference to I/O stream |
str (reference to the stream after manipulation).
#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';}
Output:
Default behavior: c1 = a c2 = b c3 = cnoskipws behavior: c1 = a c2 = c3 = b
| clears the specified ios_base flags (function)[edit] | |
sets the specifiedios_base flags(function)[edit] | |
| consumes whitespace (function template)[edit] |
