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  1.  
  2.  
  3. #include <iostream>
  4. #include <vector>
  5. #include <list>
  6. #include <array>
  7. #include <iterator>
  8. #include <algorithm>
  9.  
  10. template<class ReversibleContainer>
  11.  void add1(ReversibleContainer &arr, const typename ReversibleContainer::value_type &val, const int code = 0) 
  12. {
  13.     int step = 1;
  14.     auto beg = arr.begin();
  15.     auto end = arr.end();
  16.     auto count = std::distance(beg, end);
  17.  
  18.     if (code < 0) {
  19.         count = -code;
  20.         step  = -1;
  21.         std::swap(beg, end);
  22.     }
  23.     else if(code > 0) {
  24.         count = code;
  25.     }
  26.  
  27.     for(; count > 0 && beg != end; std::advance(beg, step))
  28.     {
  29.         auto& cur = *beg;
  30.         if( cur == val )
  31.             cur++, count--;
  32.     }
  33. }
  34.  
  35. int main(int argc, char *argv[])
  36. {
  37.     std::vector<int> vec = {1,4,1,5,1};
  38.     std::list<int>   lst = {1,4,1,5,1};
  39.     std::array<int,5> arr = {1,4,1,5,1};
  40.  
  41.     add1(vec, 1, 0);
  42.     add1(lst, 1, 2);
  43.     add1(arr, 1, -2);
  44.  
  45.     for(auto b = vec.begin(); b != vec.end(); ++b)
  46.     	std::cout << *b << " ";
  47.     std::cout << std::endl;
  48.  
  49.     for(auto b = lst.begin(); b != lst.end(); ++b)
  50.     	std::cout << *b << " ";
  51.     std::cout << std::endl;
  52.  
  53.     for(auto b = arr.begin(); b != arr.end(); ++b)
  54.     	std::cout << *b << " ";
  55.     std::cout << std::endl;
  56.  
  57.     return 0;
  58. }
Success #stdin #stdout 0s 3064KB
comments (?)
stdin
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Standard input is empty
stdout
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2 4 2 5 2 
2 4 2 5 1 
1 4 2 5 2
https://ideone.com/yHzej
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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