There's also iso646.h which allows you to do some particularly python looking stuff:

  #include 
  #include 
  #include 
  #define is ==
  
  bool is_whitespace(int c) {
    if (c is ' ' or c is '\n' or c is '\t') {
      return true;
    }
    return false;
  }
  
  int main() {
    int current, previous;
    bool in_word;
  
    while ((current = getchar()) not_eq EOF) {
      if (is_whitespace(current) and not is_whitespace(previous)) {
        putchar('\n');
      } else {
        putchar(current);
      }
      previous = current;
    }
  
    return 0;
  }

Of course when you are willing to use preprocessor, you can do things like Bournegol: http://oldhome.schmorp.de/marc/bournegol.html

or throw exceptional loops : https://www.chiark.greenend.org.uk/%7Esgtatham/mp/