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    strrchr

    From cppreference.com
    < c | string | byte
     
    C
     
    Strings library
     
    Null-terminated byte strings
    Functions
    Character manipulation
    Conversions to and from numeric formats
    String manipulation
    String examination
    Memory manipulation
    Miscellaneous
    (C11)(C11)
     
    Defined in header <string.h>
    char* strrchr( const char* str, int ch );
    		 (1)
    /*QChar*/* strrchr( /*QChar*/* str, int ch );
    		 (2) (since C23)
    1) Finds the last occurrence of ch (after conversion to char as if by (char)ch) in the null-terminated byte string pointed to by str (each character interpreted as unsigned char). The terminating null character is considered to be a part of the string and can be found if searching for '\0'.
    2) Type-generic function equivalent to (1). Let T be an unqualified character object type.
    • If str is of type const T*, the return type is const char*.
    • Otherwise, if str is of type T*, the return type is char*.
    • Otherwise, the behavior is undefined.
    If a macro definition of each of these generic functions is suppressed to access an actual function (e.g. if (strrchr) or a function pointer is used), the actual function declaration (1) becomes visible.
    See More

    The behavior is undefined if str is not a pointer to a null-terminated byte string.

    Parameters

    str - pointer to the null-terminated byte string to be analyzed
    ch - character to search for

    Return value

    Pointer to the found character in str, or null pointer if no such character is found.

    Example

    Run this code
    #include <stdio.h>
#include <string.h>

int main(void)
{
    char szSomeFileName[] = "foo/bar/foobar.txt";
    char* pLastSlash = strrchr(szSomeFileName, '/');
    char* pszBaseName = pLastSlash ? pLastSlash + 1 : szSomeFileName;
    printf("Base Name: %s", pszBaseName);
}

    Output: 

    Base Name: foobar.txt

    References

    • C23 standard (ISO/IEC 9899:2024):
    • 7.24.5.5 The strrchr function (p: TBD)
    • C17 standard (ISO/IEC 9899:2018):
    • 7.24.5.5 The strrchr function (p: TBD)
    • C11 standard (ISO/IEC 9899:2011):
    • 7.24.5.5 The strrchr function (p: 368-369)
    • C99 standard (ISO/IEC 9899:1999):
    • 7.21.5.5 The strrchr function (p: 331)
    • C89/C90 standard (ISO/IEC 9899:1990):
    • 4.11.5.5 The strrchr function

    See also

    		 finds the first occurrence of a character
    (function) [edit]
    		finds the first location of any character in one string, in another string
    (function) [edit]
    C++ documentation for strrchr