# strpbrk

From cppreference.com
< c‎ | string‎ | byte

Defined in header ``<string.h>`` |  |
char *strpbrk( const char *dest, const char *breakset ); | (1) |
/*QChar*/ *strpbrk( /*QChar*/ *dest, const char *breakset ); | (2) | (since C23)

1 ) Scans the null-terminated byte string pointed to by dest for any character from the null-terminated byte string pointed to by breakset, and returns a pointer to that character.
2) Type-generic function equivalent to (1). Let `T` be an unqualified character object type.

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

The behavior is undefined if either dest or breakset is not a pointer to a null-terminated byte string.

### Parameters

dest | - | pointer to the null-terminated byte string to be analyzed
breakset | - | pointer to the null-terminated byte string that contains the characters to search for

### Return value

Pointer to the first character in dest, that is also in breakset, or null pointer if no such character exists.

### Notes

The name stands for "string pointer break", because it returns a pointer to the first of the separator ("break") characters.

### Example

Run this code

    #include <stdio.h>
    #include <string.h>

    int main(void)
    {
        const char* str = "hello world, friend of mine!";
        const char* sep = " ,!";

        unsigned int cnt = 0;
        do
        {
           str = strpbrk(str, sep); // find separator
           if(str) str += strspn(str, sep); // skip separator
           ++cnt; // increment word count
        }
        while(str && *str);

        printf("There are %u words\n", cnt);
    }

Output:

    There are 5 words

### References

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

  - 7.24.5.4 The strpbrk function (p: TBD)

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

  - 7.24.5.4 The strpbrk function (p: TBD)

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

  - 7.24.5.4 The strpbrk function (p: 368)

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

  - 7.21.5.4 The strpbrk function (p: 331)

- C89/C90 standard (ISO/IEC 9899:1990):

  - 4.11.5.4 The strpbrk function

### See also

strcspn | returns the length of the maximum initial segment that consists of only the characters not found in another byte string (function)
strchr | finds the first occurrence of a character (function)
strtokstrtok_s (C11) | finds the next token in a byte string (function)
C++ documentation for strpbrk

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