std::to_wstring
From cppreference.com
< cpp | string | basic string
Defined in header <string>
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std::wstring to_wstring(
int value )
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(1) | (since C++11) |
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std::wstring to_wstring(
long value )
;
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(2) | (since C++11) |
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std::wstring to_wstring(
long
long value )
;
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(3) | (since C++11) |
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std::wstring to_wstring(
unsigned value )
;
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(4) | (since C++11) |
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std::wstring to_wstring(
unsigned
long value )
;
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(5) | (since C++11) |
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std::wstring to_wstring(
unsigned
long
long value )
;
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(6) | (since C++11) |
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std::wstring to_wstring(
float value )
;
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(7) | (since C++11) |
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std::wstring to_wstring(
double value )
;
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(8) | (since C++11) |
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std::wstring to_wstring(
long
double value )
;
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(9) | (since C++11) |
Converts a numeric value to std::wstring.
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Let
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)
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(until C++26) |
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1-9) Converts a numeric value to a wide string as if by
std::format(L"{}", value)
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(since C++26) |
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
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
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(C++11)
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converts an integral or floating-point value to string (function) |