std::wmemchr
From cppreference.com
Defined in header <cwchar> | ||
constwchar_t* wmemchr(constwchar_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.
Contents |
[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
Run this code
#include <clocale>#include <cwchar>#include <iostream>#include <locale> int main(){constwchar_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';conststd::size_t sz = sizeof str / sizeof *str;if(constwchar_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
[edit]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) |
C documentation for wmemchr | |
