найти подстроку (find a substring)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
strstr — find a substring
Синопсис (Synopsis)
#include <string.h>
char *strstr(const char *s1, const char *s2);
Описание (Description)
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The strstr() function shall locate the first occurrence in the
string pointed to by s1 of the sequence of bytes (excluding the
terminating NUL character) in the string pointed to by s2.
Возвращаемое значение (Return value)
Upon successful completion, strstr() shall return a pointer to
the located string or a null pointer if the string is not found.
If s2 points to a string with zero length, the function shall
return s1.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
strchr(3p)
The Base Definitions volume of POSIX.1‐2017, string.h(0p)
