fork download
copy 
  1. #include <iostream>
  2. #include <string>
  3.  
  4.  
  5. void print_nth_word(std::istream& in, std::size_t nth){
  6.     std::string word;
  7.     std::size_t n{};
  8.  
  9.     while(in >> word){
  10.         if(++n % nth == 0)
  11.             std::cout << word << '\n';
  12.     }
  13. }
  14.  
  15.  
  16. void print_nth_word(const std::string& s, std::size_t nth){
  17.     std::string word;
  18.     std::size_t n{};
  19.  
  20.    for(auto it = s.begin(); it < s.end(); ++it){
  21.         while(it < s.end() && *it == ' ')
  22.             ++it;
  23.  
  24.         if(it == s.end())
  25.             return;
  26.  
  27.         word.clear();
  28.  
  29.         while(it < s.end() && *it != ' ')
  30.             word.push_back(*it++);
  31.  
  32.         if(++n % nth == 0)
  33.             std::cout << word << '\n';
  34.     }
  35. }
  36.  
  37. #include <sstream>
  38.  
  39. int main(){
  40.     std::string text = "Tell the truth, Nobody will do Anything.";
  41.     std::stringstream stream{text};
  42.  
  43.     print_nth_word(text, 3);
  44.     print_nth_word(stream, 3);
  45. }
  46.  
Success #stdin #stdout 0.01s 5620KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
truth,
do
truth,
do
https://ideone.com/PYK3GV
language:
C++ 4.3.2 (gcc-4.3.2)
created:
3 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!