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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. enum shift_dir { POSITIVE = 1, NEGATIVE = -1 };
  6.  
  7. int main() {
  8.  
  9.     int index = 0;
  10.     vector<int> v = {1,2,3,4};
  11.  
  12.     auto dir = shift_dir::NEGATIVE;
  13.  
  14.     index = (index + dir) % v.size();
  15.     cout << index << endl;
  16.  
  17.     index = (index + dir) % v.size();
  18.     cout << index << endl;
  19.  
  20.     index = (index + dir) % v.size();
  21.     cout << index << endl;
  22.  
  23.     index = (index + dir) % v.size();
  24.     cout << index << endl;
  25.  
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/1kovYp
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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