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  1. #include <iostream>
  2. #include <utility>
  3. #include <tuple>
  4. #include <iterator>
  5. #include <vector>
  6.  
  7. template<class It>
  8. struct range_t {
  9.     It b; It e;
  10.  
  11.     It begin() const { return b; }
  12.     It end() const { return e; }
  13. };
  14.  
  15. template<class It>
  16. range_t<It> range(It s, It f) {
  17.     return {s,f};
  18. }
  19. template<class C>
  20. auto backwards(C&& c) {
  21.     using std::rbegin; using std::rend;
  22.     return range( rbegin(c), rend(c) );
  23. }
  24.  
  25. int main() {
  26.     std::cout << "Enter some text (blank line to finish):\n";
  27.     std::string line;
  28.     std::vector<std::string> lines;
  29.     while (std::getline(std::cin, line))
  30.         lines.push_back(line);
  31.     for (auto&& line:backwards(lines))
  32.         std::cout << line << "\n";
  33. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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hello world
this is line 2
and this is line 3
the end of the input
stdout
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Enter some text (blank line to finish):
the end of the input
and this is line 3
this is line 2
hello world
https://ideone.com/Q0pPjG
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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