std::wmemchr - cppreference.com (original) (raw)
| Defined in header | | | | --------------------------------------------------------------------------------------------------------------- | --- | | | const wchar_t* wmemchr( const wchar_t* ptr, wchar_t ch, std::size_t count ); | (1) | | | wchar_t* wmemchr( wchar_t* ptr, wchar_t ch, std::size_t count ); | (2) | |
Locates the first occurrence of wide character ch in the initial count wide characters of the wide character array pointed to by ptr.
If count is zero, the function returns a null pointer.
[edit] Parameters
| ptr | - | pointer to the wide character array to be examined |
|---|---|---|
| ch | - | wide character to search for |
| count | - | number of wide characters to examine |
[edit] Return value
Pointer to the location of the wide character, or a null pointer if no such character is found.
[edit] Example
#include #include #include #include int main() { const wchar_t str[] = L"诺不轻信，故人不负我\0诺不轻许，故我不负人。"; wchar_t target = L'许'; const std::size_t sz = sizeof str / sizeof str; if (const wchar_t result = std::wmemchr(str, target, sz)) { std::setlocale(LC_ALL, "en_US.utf8"); std::wcout.imbue(std::locale("en_US.utf8")); std::wcout << "Found '" << target << "' at position " << result - str << '\n'; } }
Possible output: