| 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 | |||||||||||||||||||||||||||||||
| 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& showpoint(std::ios_base& str); | (1) | |
std::ios_base& noshowpoint(std::ios_base& str); | (2) | |
Enables or disables the unconditional inclusion of the decimal point character in floating-point output. Has no effect on input.
showpoint flag in the streamstr as if by callingstr.unsetf(std::ios_base::showpoint).This is an I/O manipulator, it may be called with an expression such asout<< std::showpoint for anyout of typestd::basic_ostream or with an expression such asin>> std::showpoint for anyin of typestd::basic_istream.
The character to use as decimal point character is determined by the numpunct facet of the locale imbued in the stream at the time of output, as described instd::num_put::put.
Contents |
| str | - | reference to I/O stream |
str (reference to the stream after manipulation).
#include <iostream> int main(){std::cout<<"1.0 with showpoint: "<< std::showpoint<<1.0<<'\n'<<"1.0 with noshowpoint: "<< std::noshowpoint<<1.0<<'\n';}
Output:
1.0 with showpoint: 1.000001.0 with noshowpoint: 1
| clears the specified ios_base flags (function)[edit] | |
sets the specifiedios_base flags(function)[edit] |
