From cppreference.com
Defined in header
std::wstringto_wstring(intvalue); (1) (since C++11)std::wstringto_wstring(longvalue); (2) (since C++11)std::wstringto_wstring(longlongvalue); (3) (since C++11)std::wstringto_wstring(unsignedvalue); (4) (since C++11)std::wstringto_wstring(unsignedlongvalue); (5) (since C++11)std::wstringto_wstring(unsignedlonglongvalue); (6) (since C++11)std::wstringto_wstring(floatvalue); (7) (since C++11)std::wstringto_wstring(doublevalue); (8) (since C++11)std::wstringto_wstring(longdoublevalue); (9) (since C++11)Converts a numeric value to
.
Let buf be an internal to the conversion functions buffer, sufficiently large to contain the result of conversion.
1) Converts a signed decimal integer to a wide string as if by std::swprintf(buf,sz,L"%d",value).
2) Converts a signed decimal integer to a wide string as if by std::swprintf(buf,sz,L"%ld",value).
3) Converts a signed decimal integer to a wide string as if by std::swprintf(buf,sz,L"%lld",value).
4) Converts an unsigned decimal integer to a wide string as if by std::swprintf(buf,sz,L"%u",value).
5) Converts an unsigned decimal integer to a wide string as if by std::swprintf(buf,sz,L"%lu",value).
6) Converts an unsigned decimal integer to a wide string as if by std::swprintf(buf,sz,L"%llu",value).
7,8) Converts a floating point value to a wide string as if by std::swprintf(buf,sz,L"%f",value).
9) Converts a floating point value to a wide string as if by std::swprintf(buf,sz,L"%Lf",value).
(until C++26)1-9) Converts a numeric value to a wide string as if by std::format(L"{}",value).
(since C++26)Parameters
value - a numeric value to convert Return value
A wide string holding the converted value.
Exceptions
May throw
from the
constructor.
Example
Run this code
#include<iostream>#include<string>intmain(){for(constdoublef:{23.43,1e-9,1e40,1e-40,123456789.0})std::wcout<<"std::wcout: "<<f<<'\n'<<"to_wstring: "<<std::to_wstring(f)<<"\n\n";}Output:
std::wcout: 23.43 to_wstring: 23.430000 std::wcout: 1e-09 to_wstring: 0.000000 std::wcout: 1e+40 to_wstring: 10000000000000000303786028427003666890752.000000 std::wcout: 1e-40 to_wstring: 0.000000 std::wcout: 1.23457e+08 to_wstring: 123456789.000000 See also
(C++11)
converts an integral or floating-point value to string
(function)