Exercise · Strings and Arrays · lesson 6 of 6
Exercise: word count
Write a function int word_count(std::string_view s) that returns the number of words in the string s. A word is an unbroken run of characters other than the space ' '.
word_count("one")→1word_count("a b c")→3word_count(" two words ")→2
Constraints: there can be any number of spaces at the start, at the end and between words. An empty string or a string of only spaces has no words, so the answer is 0.
