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.
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) [edit] Parameters value - a numeric value to convert [edit] Return valueA wide string holding the converted value.
[edit] ExceptionsMay throw std::bad_alloc from the std::wstring constructor.
[edit] Example#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[edit] See also converts an integral or floating-point value to
string
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