std::to_wstring

C++

Language

Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

Strings library

Null-terminated strings

Byte strings

Multibyte strings

Wide strings

Classes

basic_string

basic_string_view (C++17)

char_traits

std::basic_string

Member functions basic_string::basic_string basic_string::operator= basic_string::assign basic_string::get_allocator Element access basic_string::at basic_string::operator[] basic_string::front (C++11) basic_string::back (C++11) basic_string::data basic_string::c_str basic_string::operator basic_string_view (C++17) Iterators basic_string::beginbasic_string::cbegin (C++11) basic_string::endbasic_string::cend (C++11) basic_string::rbeginbasic_string::crbegin (C++11) basic_string::rendbasic_string::crend (C++11) Capacity basic_string::empty basic_string::sizebasic_string::length basic_string::max_size basic_string::reserve basic_string::capacity basic_string::shrink_to_fit (C++11)

Operations 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::starts_with (C++20) basic_string::ends_with (C++20) basic_string::replace basic_string::substr basic_string::copy basic_string::resize basic_string::swap Search 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 Constants basic_string::npos

Non-member functions operator+ operator==operator!=operator<operator>operator<=operator>= swap(std::basic_string) operator<<operator>> getline stoistolstoll (C++11)(C++11)(C++11) stoulstoull (C++11)(C++11) stofstodstold (C++11)(C++11)(C++11) to_string (C++11) to_wstring (C++11) operator""s (C++14) Helper classes hash<std::string>hash<std::wstring>hash<std::u32string>hash<std::u16string> (C++11)(C++11)(C++11)(C++11) hash<std::pmr::string>hash<std::pmr::wstring>hash<std::pmr::u32string>hash<std::pmr::u16string> (C++20)(C++20)(C++20)(C++20) Deduction guides(C++17)

Defined in header <string>
std::wstring to_wstring( int value );	(1)	(since C++11)
std::wstring to_wstring( long value );	(2)	(since C++11)
std::wstring to_wstring( long long value );	(3)	(since C++11)
std::wstring to_wstring( unsigned value );	(4)	(since C++11)
std::wstring to_wstring( unsigned long value );	(5)	(since C++11)
std::wstring to_wstring( unsigned long long value );	(6)	(since C++11)
std::wstring to_wstring( float value );	(7)	(since C++11)
std::wstring to_wstring( double value );	(8)	(since C++11)
std::wstring to_wstring( long double value );	(9)	(since C++11)

Converts a numeric value to std::wstring.

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

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

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

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

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

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

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

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

Parameters

value

-

a numeric value to convert

Return value

a wide string holding the converted value

Exceptions

May throw std::bad_alloc from the the std::wstring constructor.

Example

Run this code

#include <string>
#include <iostream>

int main() {
    double f = 23.43;	
    std::wstring f_str = std::to_wstring(f);
    std::wcout << f_str;
}

Output:

23.430000

See also

to_string (C++11)

converts an integral or floating point value to string (function)