std::to_string

 

C++

言語

コンセプト

ユーティリティライブラリ

ストリングスライブラリ

コンテナライブラリ

アルゴリズムライブラリ

イテレータライブラリ

ニューメリックスライブラリ

入力/出力ライブラリ

ローカライゼーションライブラリ

正規表現ライブラリ (C++11)

アトミック操作ライブラリ (C++11)

スレッドのサポートライブラリ (C++11)

 

文字列ライブラリ

NULLで終端された文字列

バイト文字列

マルチバイト文字列

ワイド文字列

クラス

basic_string

char_traits

 

std::basic_string

メンバ関数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::basic_string

basic_string::operator=

basic_string::assign

basic_string::get_allocator

要素アクセスの循環参照を解除するために使用されている Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::at

basic_string::operator[]

basic_string::front (C++11)

basic_string::back (C++11)

basic_string::data

basic_string::c_str

イテレータ Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::begin basic_string::cbegin (C++11)

basic_string::end basic_string::cend (C++11)

basic_string::rbegin basic_string::crbegin (C++11)

basic_string::rend basic_string::crend (C++11)

容量 Original: Capacity The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::empty

basic_string::size

basic_string::length

basic_string::max_size

basic_string::reserve

basic_string::capacity

basic_string::shrink_to_fit (C++11)

操作 Original: Operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::clear

basic_string::insert

basic_string::erase

basic_string::push_back

basic_string::pop_back (C++11)

basic_string::append

basic_string::operator+=

basic_string::compare

basic_string::replace

basic_string::substr

basic_string::copy

basic_string::resize

basic_string::swap

検索 Original: Search The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::find

basic_string::rfind

basic_string::find_first_of

basic_string::find_first_not_of

basic_string::find_last_of

basic_string::find_last_not_of

定数 Original: Constants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::npos

非メンバ関数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

operator+

operator== operator!= operator< operator> operator<= operator>=

swap(std::basic_string)

operator<< operator>>

getline

stoi stol stoll (C++11) (C++11) (C++11)

stoul stoull (C++11) (C++11)

stof stod stold (C++11) (C++11) (C++11)

to_string (C++11)

to_wstring (C++11)

ヘルパークラス Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

hash<std::string> hash<std::wstring> hash<std::u32string> hash<std::u16string> (C++11)

 

Defined in header <string>
std::string to_string( int value );	(1)	(C++11およびそれ以降)
std::string to_string( long value );	(2)	(C++11およびそれ以降)
std::string to_string( long long value );	(3)	(C++11およびそれ以降)
std::string to_string( unsigned value );	(4)	(C++11およびそれ以降)
std::string to_string( unsigned long value );	(5)	(C++11およびそれ以降)
std::string to_string( unsigned long long value );	(6)	(C++11およびそれ以降)
std::string to_string( float value );	(7)	(C++11およびそれ以降)
std::string to_string( double value );	(8)	(C++11およびそれ以降)
std::string to_string( long double value );	(9)	(C++11およびそれ以降)

1)

std::sprintf(buf, "%d", value)が十分に大きいために生産bufれるものと同じ内容の文字列に符号付き10進整数に変換し.

Original:

Converts a signed decimal integer to a string with the same content as what std::sprintf(buf, "%d", value) would produce for sufficiently large buf.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

2)

std::sprintf(buf, "%ld", value)が十分に大きいために生産bufれるものと同じ内容の文字列に符号付き10進整数に変換し..

Original:

Converts a signed decimal integer to a string with the same content as what std::sprintf(buf, "%ld", value) would produce for sufficiently large buf..

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

3)

std::sprintf(buf, "%lld", value)が十分に大きいために生産bufれるものと同じ内容の文字列に符号付き10進整数に変換し.

Original:

Converts a signed decimal integer to a string with the same content as what std::sprintf(buf, "%lld", value) would produce for sufficiently large buf.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

4)

std::sprintf(buf, "%u", value)が十分に大きいために生産bufれるものと同じ内容の文字列に符号なし10進整数に変換し.

Original:

Converts an unsigned decimal integer to a string with the same content as what std::sprintf(buf, "%u", value) would produce for sufficiently large buf.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

5)

std::sprintf(buf, "%lu", value)が十分に大きいために生産bufれるものと同じ内容の文字列に符号なし10進整数に変換し.

Original:

Converts an unsigned decimal integer to a string with the same content as what std::sprintf(buf, "%lu", value) would produce for sufficiently large buf.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

6)

std::sprintf(buf, "%llu", value)が十分に大きいために生産bufれるものと同じ内容の文字列に符号なし10進整数に変換し.

Original:

Converts an unsigned decimal integer to a string with the same content as what std::sprintf(buf, "%llu", value) would produce for sufficiently large buf.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

@ 7,8 @std::sprintf(buf, "%f", value)が十分に大きいために生産bufれるものと同じ内容の文字列に浮動小数点値に変換し.

Original:

@7,8@ Converts a floating point value to a string with the same content as what std::sprintf(buf, "%f", value) would produce for sufficiently large buf.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

9)

std::sprintf(buf, "%Lf", value)が十分に大きいために生産bufれるものと同じ内容の文字列に浮動小数点値に変換し.

Original:

Converts a floating point value to a string with the same content as what std::sprintf(buf, "%Lf", value) would produce for sufficiently large buf.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

パラメータ

value

-

変換する数値 Original: a numeric value to convert The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

値を返します

変換された値を保持している文字列

Original:

a string holding the converted value

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

例

このコードを実行します

#include <iostream>
#include <string>
 
int main() 
{
    double f = 23.43;
    std::string f_str = std::to_string(f);
    std::cout << f_str << '\n';
}

出力:

23.430000

も参照してください

to_wstring (C++11)	wstringに整数型または浮動小数点値に変換します Original: converts an integral or floating point value to wstring The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数)