C language of index0f() function of javascript.

C language of index0f() function of javascript.c

int indexOf(void *word, void *chars)
{
    char *result = strstr(word, chars);
    if (result == NULL)
    {
        printf("%s\n", "Not found");
        return -1;
    }

    char *p = word;
    char *q = chars;
    int i = 0;
    while (*p != '\0')
    {
        while (*q != '\0')
        {
            if (*p == *q)
            {
                return i;
            }
            q++;
        }
        p++;
        i++;
        q = chars;
    }
    return -1;
}