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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. using namespace std;
  5.  
  6. // 3. Implement count() yourself. Test it.
  7.  
  8. template<typename Iter, typename T>
  9. typename iterator_traits<Iter>::value_type
  10. count(Iter first, Iter last, T value)
  11. // T should be of type int or double
  12. {
  13.     typename iterator_traits<Iter>::value_type sum = 0;
  14.     for (Iter it = first; it != last; it++)
  15.     {
  16.         if (*it == value)
  17.         {
  18.             sum++;
  19.         }
  20.     }
  21.     return sum;
  22. }
  23.  
  24. int main()
  25. {
  26.     vector<int> v {1, 2, 3, 1, 5};
  27.     cout << count(v.begin(), v.end(), 1) << endl;
  28.     return 0;
  29. }
  30.  
Success #stdin #stdout 0s 15240KB
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https://ideone.com/wdkoZZ
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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