C++

Reference

<cwchar> (wchar.h)

function
<cwchar>

wcstoll

long long int strtoll (const wchar_t* str, wchar_t** endptr, int base);
Convert wide string to long long integer
Parses the C wide string str interpreting its content as an integral number of the specified base, which is returned as a long long int value. If endptr is not a null pointer, the function also sets the value of endptr to point to the first character after the number.

This is the wide character equivalent of strtoll (<cstdlib>), interpreting str in the same way.

Parameters

str
C wide string beginning with the representation of an integral number.
endptr
Reference to an object of type wchar_t*, whose value is set by the function to the next character in str after the numerical value.
This parameter can also be a null pointer, in which case it is not used.

Return Value

On success, the function returns the converted integral number as a long int value.
If no valid conversion could be performed, a zero value is returned (0LL).
If the value read is out of the range of representable values by a long long int, the function returns LLONG_MAX or LLONG_MIN (defined in <climits>), and errno is set to ERANGE.

Example

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/* wcstoll example */
#include <wchar.h>

int main ()
{
  wchar_t wsNumbers[] = L"1856892505 17b00a12b -01100011010110000010001101100 0x6fffff";
  wchar_t * pEnd;
  long long int lli1, lli2, lli3, lli4;
  lli1 = wcstoll (wsNumbers,&pEnd,10);
  lli2 = wcstoll (pEnd,&pEnd,16);
  lli3 = wcstoll (pEnd,&pEnd,2);
  lli4 = wcstoll (pEnd,NULL,0);
  wprintf (L"The decimal equivalents are: %lld, %lld, %lld and %lld.\n", lli1, lli2, lli3, lli4);
  return 0;
}

Possible output:

The decimal equivalents are: 1856892505, 6358606123, -208340076 and 7340031


See also

strtoll
Convert string to long long integer (function)
wcstol
Convert wide string to long integer (function)
wcstoull
Convert wide string to unsigned long long integer (function)
wcstod
Convert wide string to double (function)