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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. 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 suffi- ciently 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 suffi- ciently 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 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. }) { 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 2022.07.31 std::to_wstring(3)
NAME | Synopsis | Parameters | Return value | Exceptions | Example | Output: | See also
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