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Defined in header <cwchar> | ||
std::size_t wcscspn(constwchar_t* dest,constwchar_t* src); | ||
Returns the length of the maximum initial segment of the wide string pointed to bydest, that consists of only the charactersnot found in wide string pointed to bysrc.
Contents |
| 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 |
The length of the maximum initial segment that contains only characters not found in the character string pointed to bysrc.
The output below was obtained using clang (libc++).
#include <cwchar>#include <iostream>#include <locale> int main(){wchar_t dest[]= L"白猫 黑狗 甲虫";// └───┐constwchar_t* src= L"甲虫,黑狗"; conststd::size_t len= std::wcscspn(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 3.The segment is "白猫 ".
| returns the length of the maximum initial segment that consists of only the wide characters 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] | |
C documentation forwcscspn | |
