# strrchr

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< c‎ | string‎ | byte

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.

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 <string.h>
    #include <stdio.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

- 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

strchr | finds the first occurrence of a character (function)
strpbrk | finds the first location of any character in one string, in another string (function)

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