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kutuzzzov

Урок 2 зачем мучаться

Jun 10th, 2023
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C++ 2.65 KB | None | 0 0
  1. #include <algorithm>
  2. #include <iostream>
  3. #include <string>
  4. #include <vector>
  5.  
  6. using namespace std;
  7.  
  8. enum class Gender { FEMALE, MALE };
  9.  
  10. struct Person {
  11.     int age;           // возраст
  12.     Gender gender;     // пол
  13.     bool is_employed;  // имеет ли работу
  14. };
  15.  
  16. template <typename InputIt>
  17. int ComputeMedianAge(InputIt range_begin, InputIt range_end) {
  18.     if (range_begin == range_end) {
  19.         return 0;
  20.     }
  21.     vector<typename InputIt::value_type> range_copy(range_begin, range_end);
  22.     auto middle = range_copy.begin() + range_copy.size() / 2;
  23.     nth_element(range_copy.begin(), middle, range_copy.end(), [](const Person& lhs, const Person& rhs) {
  24.         return lhs.age < rhs.age;
  25.     });
  26.     return middle->age;
  27. }
  28.  
  29. // напишите сигнатуру и реализацию функции PrintStats
  30. void PrintStats(vector<Person>& persons) {
  31.     cout << "Median age = "s << ComputeMedianAge(persons.begin(), persons.end()) << endl;
  32.     auto it = partition(persons.begin(), persons.end(), [](Person& person) {return person.gender == Gender::FEMALE; });
  33.     cout << "Median age for females = "s << ComputeMedianAge(persons.begin(), it) << endl;
  34.     it = partition(persons.begin(), persons.end(), [](Person& person) {return person.gender == Gender::MALE; });
  35.     cout << "Median age for males = "s << ComputeMedianAge(persons.begin(), it) << endl;
  36.     it = partition(persons.begin(), persons.end(), [](Person& person) {return person.gender == Gender::FEMALE && person.is_employed; });
  37.     cout << "Median age for employed females = "s << ComputeMedianAge(persons.begin(), it) << endl;
  38.     it = partition(persons.begin(), persons.end(), [](Person& person) {return person.gender == Gender::FEMALE && !person.is_employed; });
  39.     cout << "Median age for unemployed females = "s << ComputeMedianAge(persons.begin(), it) << endl;
  40.     it = partition(persons.begin(), persons.end(), [](Person& person) {return person.gender == Gender::MALE && person.is_employed; });
  41.     cout << "Median age for employed males = " << ComputeMedianAge(persons.begin(), it) << endl;
  42.     it = partition(persons.begin(), persons.end(), [](Person& person) {return person.gender == Gender::MALE && !person.is_employed; });
  43.     cout << "Median age for unemployed males = "s << ComputeMedianAge(persons.begin(), it) << endl;
  44. }
  45.  
  46. int main() {
  47.     vector<Person> persons = {
  48.         {31, Gender::MALE, false},   {40, Gender::FEMALE, true},  {24, Gender::MALE, true},
  49.         {20, Gender::FEMALE, true},  {80, Gender::FEMALE, false}, {78, Gender::MALE, false},
  50.         {10, Gender::FEMALE, false}, {55, Gender::MALE, true},
  51.     };
  52.     PrintStats(persons);
  53. }
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