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  1. #include <algorithm>    // For std::reverse
  2. #include <iostream>     // For console output
  3. #include <vector>       // For std::vector
  4. using namespace std;
  5.  
  6. // Used to print elements of a sequence (like vector).
  7. template <typename Sequence>
  8. void print(const Sequence& s) {
  9.     cout << "[ ";
  10.     for (const auto& x : s) {
  11.         cout << x << ' ';
  12.     }
  13.     cout << "]" << endl;
  14. }
  15.  
  16. int main() {
  17.     cout << "Original vector:\n";
  18.     vector<int> v{10, 20, 30, 40, 50};
  19.     print(v);
  20.  
  21.     vector<int> v2(v.rbegin(), v.rend());
  22.     cout << "\nReversed copy using reverse iterators:\n";
  23.     print(v2);
  24.  
  25.     reverse(v.begin(), v.end());    
  26.     cout << "\nReversed in-place using std::reverse():\n";
  27.     print(v);
  28. }
  29.  
Success #stdin #stdout 0s 3428KB
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stdin
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Standard input is empty
stdout
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Original vector:
[ 10 20 30 40 50 ]

Reversed copy using reverse iterators:
[ 50 40 30 20 10 ]

Reversed in-place using std::reverse():
[ 50 40 30 20 10 ]
https://ideone.com/sIiXVd
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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