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.
| Let 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) |
| value | - | a numeric value to convert |
A wide string holding the converted value.
May throw std::bad_alloc from the std::wstring constructor.
#include <iostream>
#include <string>
int main()
{
for (const double f : {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
|
(C++11) | converts an integral or floating point value to string (function) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/string/basic_string/to_wstring