function

std::to_wstring

wstring to_wstring (int val);
wstring to_wstring (long val);
wstring to_wstring (long long val);
wstring to_wstring (unsigned val);
wstring to_wstring (unsigned long val);
wstring to_wstring (unsigned long long val);
wstring to_wstring (float val);
wstring to_wstring (double val);
wstring to_wstring (long double val);

Convert numerical value to wide string

Returns a wstring with the representation of val.

The format used is the same that wprintf would print for the corresponding type:

type of val	`wprintf` equivalent	description
`int`	`L"%d"`	Decimal-base representation of val. The representations of negative values are preceded with a minus sign (`-`).
`long`	`L"%ld`
`long long`	`L"%lld`
`unsigned`	`"L%u"`	Decimal-base representation of val.
`unsigned long`	`L"%lu`
`unsigned long long`	`L"%llu`
`float`	`L"%f"`	As many digits are written as needed to represent the integral part, followed by the decimal-point character and six decimal digits. `inf` (or `infinity`) is used to represent infinity. `nan` (followed by an optional sequence of characters) to represent NaNs (Not-a-Number). The representations of negative values are preceded with a minus sign (`-`).
`double`	`L"%f`
`long double`	`L"%Lf`

Parameters

val: Numerical value.

Return Value

A wstring object containing the representation of val as a sequence of characters.

Example

// to_wstring example
#include <iostream>   // std::wcout
#include <string>     // std::wstring, std::to_wstring

int main ()
{
  std::wstring pi = L"pi is " + std::to_wstring(3.1415926);
  std::wstring perfect = std::to_wstring(1+2+4+7+14) + L" is a perfect number";
  std::wcout << pi << L'\n';
  std::wcout << perfect << L'\n';
  return 0;
}