std::wcsspn - cppreference.com (original) (raw)
| | | | | -------------------------------------------------------------- | | | | size_t wcsspn( const wchar_t* dest, const wchar_t* src ); | | |
Returns the length of the maximum initial segment of the wide string pointed to by dest, that consists of only the characters found in wide string pointed to by src.
[edit] Parameters
| dest | - | pointer to the null-terminated wide string to be analyzed |
|---|---|---|
| src | - | pointer to the null-terminated wide string that contains the characters to search for |
[edit] Return value
The length of the maximum initial segment that contains only characters from wide string pointed to by src.
[edit] Example
#include #include #include int main() { wchar_t dest[] = L"白猫 黑狗 甲虫"; const wchar_t src[] = L" 狗猫 白黑 "; const std::size_t len = std::wcsspn(dest, src); dest[len] = L'\0'; // terminates the segment to print it out std::wcout.imbue(std::locale("en_US.utf8")); std::wcout << L"The length of maximum initial segment is " << len << L".\n"; std::wcout << L"The segment is "" << dest << L"".\n"; }
Possible output:
The length of maximum initial segment is 6. The segment is "白猫 黑狗 ".
[edit] See also
| | returns the length of the maximum initial segment that consistsof only the wide not found in another wide string (function) [edit] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | finds the first location of any wide character in one wide string, in another wide string (function) [edit] | | |