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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7. class book {
  8. private:
  9. 	int y, m, d;
  10. public:
  11. 	book(int y_, int m_, int d_) {
  12. 		y = y_;
  13. 		m = m_;
  14. 		d = d_;
  15. 	}
  16. 	int getY(){ return y; };
  17. 	int getM(){ return m; };
  18. 	int getD(){ return d; };
  19. };
  20.  
  21. // true если a<b иначе false(a>b,a>=b)
  22. bool comp(book a, book b) {
  23. 	if (a.getY() < b.getY()) {
  24. 		return true;
  25. 	}
  26. 	else if (a.getY() > b.getY()) {
  27. 		return false;
  28. 	}
  29. 	else if (a.getM() < b.getM()) {
  30. 		return true;
  31. 	}
  32. 	else if (a.getM() > b.getM()) {
  33. 		return false;
  34. 	}
  35. 	else if (a.getD() > b.getD()) {
  36. 		return false;
  37. 	}
  38. 	else if (a.getD() < b.getD()) {
  39. 		return true;
  40. 	}
  41. 	else {
  42. 		return false;
  43. 	}
  44. }
  45.  
  46. int main()
  47. {
  48. 	book b1(2020, 01, 10);
  49. 	book b2(2020, 02, 12);
  50. 	book b3(2010, 01, 10);
  51. 	book b4(2010, 01, 10);
  52.  
  53. 	vector<book> v1{ b1, b2, b3, b4 };
  54.  
  55. 	// сортировка
  56. 	sort(v1.begin(), v1.end(), comp);
  57.  
  58. 	// вывод
  59. 	for (auto i : v1) {
  60. 		cout << i.getD() << ':' << i.getM() << ':' << i.getY() << '\n';
  61. 	};
  62. }
Success #stdin #stdout 0s 4240KB
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Standard input is empty
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10:1:2010
10:1:2010
10:1:2020
12:2:2020
https://ideone.com/19cVO6
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
secret

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