#include <iostream>
#include <string>
#include <ctype.h>
 
using namespace std;
 
int word_count, letter_count;
 
bool get_word()
{
  char c;
 
  // skip all characters except for letters and new-line
  while (cin.get(c) && !isalpha(c) && '\n' != c)
    ;
 
  // did we reach the end of line?
  if (!cin || '\n' == c)
    return false; // we read all the words
 
  //
  string word{ c }; // add the first read character to word
  while (cin.get(c) && isalpha(c)) // while the read character is a letter add it to the word
    word += c;
 
  // the last read character is not a letter, so put it back in stream
  cin.putback(c);
 
  // now we have a word: count it
  ++word_count;
 
  // count letters in word
  letter_count += word.length();
 
  // we still have words to read
  return true;
}
 
int main()
{
  while (get_word())
    ;
 
  cout
    << "words: " << word_count << endl
    << "letters: " << letter_count;
}
 
 

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SGVsbG8sIHdvcmxkIQ==

Hello, world!