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std::to_wstring(3) C++ Standard Libary std::to_wstring(3) NAME std::to_wstring - std::to_wstring Synopsis 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 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 (until C++26) 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). 1-9) Converts a numeric value to a wide string as if by (since C++26) std::format(L"{}", value). Parameters value - a numeric value to convert Return value A wide string holding the converted value. Exceptions May throw std::bad_alloc from the std::wstring constructor. Example // Run this code #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 See also to_string converts an integral or floating-point value to string (C++11) (function) http://cppreference.com 2024.06.10 std::to_wstring(3)
NAME | Synopsis | Parameters | Return value | Exceptions | Example | Output: | See also
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