# wcsrchr

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< c‎ | string‎ | wide

Defined in header ``<wchar.h>`` |  |
wchar_t *wcsrchr( const wchar_t *str, wchar_t ch ); | (1) | (since C95)
/*QWchar_t*/ *wcsrchr( /*QWchar_t*/ *str, wchar_t ch ); | (2) | (since C23)

1) Finds the last occurrence of the wide character ch in the wide string pointed to by str.
2) Type-generic function equivalent to (1). Let `T` be an unqualified wide character object type.

  - If `str` is of type const T*, the return type is const wchar_t*.
  - Otherwise, if `str` is of type T*, the return type is wchar_t*.
  - 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 (wcsrchr) or a function pointer is used), the actual function declaration (1) becomes visible.

### Parameters

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

### Return value

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

### Example

Run this code

    #include <locale.h>
    #include <stdio.h>
    #include <wchar.h>

    int main(void)
    {
        wchar_t arr[] = L"白猫 黒猫 кошки";
        wchar_t *cat = wcsrchr(arr, L'猫');
        wchar_t *dog = wcsrchr(arr, L'犬');

        setlocale(LC_ALL, "en_US.utf8");

        cat ? printf("The character 猫 found at position %td\n", cat - arr)
            : puts("The character 猫 not found");

        dog ? printf("The character 犬 found at position %td\n", dog - arr)
            : puts("The character 犬 not found");
    }

Output:

    The character 猫 found at position 4
    The character 犬 not found

### References

- C23 standard (ISO/IEC 9899:2024):

  - 7.31.4.6.4 The wcsrchr function (p: TBD)

- C17 standard (ISO/IEC 9899:2018):

  - 7.29.4.5.4 The wcsrchr function (p: 318)

- C11 standard (ISO/IEC 9899:2011):

  - 7.29.4.5.4 The wcsrchr function (p: 436)

- C99 standard (ISO/IEC 9899:1999):

  - 7.24.4.5.4 The wcsrchr function (p: 382)

### See also

wcschr (C95) | finds the first occurrence of a wide character in a wide string (function)
wcspbrk (C95) | finds the first location of any wide character in one wide string, in another wide string (function)
C++ documentation for wcsrchr

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