std::wmemchr
Defined in header <cwchar>
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const wchar_t* wmemchr( const wchar_t* ptr, wchar_t ch, std::size_t count ); |
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wchar_t* wmemchr( wchar_t* ptr, wchar_t ch, std::size_t count ); |
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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.
Parameters
ptr | - | pointer to the wide character array to be examined |
ch | - | wide character to search for |
count | - | number of wide characters to examine |
Return value
Pointer to the location of the wide character, or a null pointer if no such character is found.
Example
Run this code
#include <iostream> #include <cwchar> #include <clocale> #include <locale> 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:
Found '许' at position 14
See also
searches an array for the first occurrence of a character (function) | |
finds the first occurrence of a character (function) | |
finds the first occurrence of a wide character in a wide string (function) | |
(C++11) |
finds the first element satisfying specific criteria (function template) |