/* wordstat.cpp -- Matt Mahoney, mmahoney@cs.fit.edu, Feb. 8, 2004.

wordstat reads text from standard input and reports the number of
words, sentences, and paragraphs.  Definitions:

- A word is any sequence of one or more printable (non-whitespace)
  characters delimited by whitespace (space, tab, or newline).
- A sentence is a punctuation character (. ? or !) followed by whitespace.
- A paragraph is any sequence of one or more characters other than newlines
  delimited by two or more newlines (i.e. one or more blank lines).

To run: wordstat < inputfile
For example:

  wordstat
  This  is...


  a
  test !
  ^D
  5 word(s), 2 sentence(s), 2 paragraph(s)

(! is a word.  The sentences end with ... and !.  The paragraphs are
"This is..." and "a\ntest !".)
*/

#include <iostream>
#include <cctype>
using namespace std;

int main() {
  int words=0, sentences=0, paragraphs=0;  // counts
  char c, c1='\n', c2='\n';  // current and previous 2 input characters
  while (cin.get(c)) {
    if (isspace(c1) && !isspace(c))
      ++words;
    if (isspace(c) && (c1=='.' || c1=='?' || c1=='!'))
      ++sentences;
    if (c2=='\n' && c1=='\n' && c!='\n')
      ++paragraphs;
    c2=c1;
    c1=c;
  }
  cout << words << " word(s), " << sentences << " sentence(s), "
       << paragraphs << " paragraph(s)\n";
  return 0;
}