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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7.  
  8. template<class T>
  9. class Array
  10. {
  11. private:
  12.   vector<T> arr;
  13. public:
  14.   Array(int size) : arr(size) {}
  15.  
  16.   void random()
  17.   {
  18.     for (int i = 0; i < arr.size(); i++)
  19.     {
  20.       T randomNumber = -5 + (rand() % ((100 - 1) * 1 + 1)) / T(10);
  21.       arr[i] = randomNumber;
  22.     }
  23.   }
  24.  
  25.   void print() { for (int i = 0; i < arr.size(); i++) cout << arr[i] << " "; cout << endl; }
  26.  
  27.   T diff()
  28.   {
  29.     auto first_negative = find_if(arr.begin(), arr.end(), [](const T& var){ return var < 0; });
  30.     if (first_negative == arr.end())
  31.       return 0;
  32.  
  33.     int counter = 0;
  34.     auto second_positive = find_if(arr.begin(), arr.end(), [&counter](const T& var){
  35.       if (var > 0)
  36.         counter++;
  37.       if (counter == 2)
  38.         return true;
  39.       else return false;
  40.     });
  41.  
  42.     if (second_positive == arr.end())
  43.       return 0;
  44.  
  45.     return *first_negative - *second_positive;
  46.   }
  47. };
  48.  
  49.  
  50. int main()
  51. {
  52.   Array<double> ar(10);
  53.   ar.random();
  54.   ar.print();
  55.   cout << ar.diff() << endl;
  56.   return 0;
  57. }
Success #stdin #stdout 0s 3432KB
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3.3 3.6 2.7 -3.5 4.3 -1.5 3.6 4.2 -0.1 -2.9 
-7.1
https://ideone.com/jbJwa8
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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