std:: to_wstring
From cppreference.com
<
cpp
|
string
|
basic string
|
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
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
)
.
|
(until C++26) |
|
1-9)
Converts a numeric value to a wide string as if by
std::
format
(
L
"{}"
, value
)
.
|
(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 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
|
(C++11)
|
converts an integral or floating-point value to
string
(function) |