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std::wcslen
From cppreference.com
| Defined in header <cwchar>
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| std::size_t wcslen( const wchar_t* str ); |
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Returns the length of a wide string, that is the number of non-null wide characters that precede the terminating null wide character.
The behavior is undefined if there is no null character in the wide character array pointed to by str.
Contents |
[edit] Parameters
| str | - | pointer to the null-terminated wide string to be examined |
[edit] Return value
The length of the null-terminated wide string str.
[edit] Possible implementation
std::size_t wcslen(const wchar_t* start) { // NB: start is not checked for nullptr! const wchar_t* end = start; while (*end != L'\0') ++end; return end - start; } |
[edit] Example
Run this code
#include <iostream> #include <cwchar> int main() { const wchar_t* str = L"Hello, world!"; std::wcout << "The length of L\"" << str << "\" is " << std::wcslen(str) << '\n'; }
Output:
The length of L"Hello, world!" is 13
[edit] See also
| returns the length of a given string (function) | |
| returns the number of bytes in the next multibyte character (function) | |
| C documentation for wcslen
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