//en.cppreference.com/w/c/string/wide/wcspbrk.html
#include <stdio.h>
#include <wchar.h>
int main(void)
{
const wchar_t* str = L"Hello world, friend of mine!";
const wchar_t* sep = L" ,!";
unsigned int cnt = 0;
do {
str = wcspbrk(str, sep); // find separator
if (str) str += wcsspn(str, sep); // skip separator
++cnt; // increment word count
} while (str && *str);
wprintf(L"There are %u words.\n", cnt);
}