std::make_heap
Материал из cppreference.com
![]() |
This page has been machine-translated from the English version of the wiki using Google Translate.
The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here. |
Заголовочный файл <algorithm>
|
||
template< class RandomIt > void make_heap( RandomIt first, RandomIt last ); |
(1) | |
template< class RandomIt, class Compare > void make_heap( RandomIt first, RandomIt last, |
(2) | |
Создает' кучи в диапазоне
[first, last)
. Первая версия функции используется operator< для сравнения элементов, второй использует данную функцию сравнения comp
.Original:
Constructs a heap in the range
[first, last)
. The first version of the function uses operator< to compare the elements, the second uses the given comparison function comp
.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Содержание |
[править] Параметры
first, last | - | диапазон элементов, чтобы сделать кучу с
Original: the range of elements to make the heap from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |||||||||
comp | - | comparison function which returns true if the first argument is less than the second. The signature of the comparison function should be equivalent to the following:
The signature does not need to have const &, but the function must not modify the objects passed to it. | |||||||||
Требования, накладываемые на типы | |||||||||||
-RandomIt должен соответствовать требованиям RandomAccessIterator .
| |||||||||||
-Тип разыменованного RandomIt должен соответствовать требованиям MoveAssignable и MoveConstructible .
|
[править] Возвращаемое значение
(Нет)
Original:
(none)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[править] Сложность
В большинстве сравнений 3*std::distance(first, last).
Original:
At most 3*std::distance(first, last) comparisons.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[править] Notes
' Кучу целый ряд элементов
[f,l)
, который имеет следующие свойства:Original:
A heap is a range of elements
[f,l)
that has the following properties:The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
- *f является крупнейшим элементом в ассортиментеOriginal:*f is the largest element in the rangeThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Новый элемент может быть добавлена с помощью std::push_heap()Original:a new element can be added using std::push_heap()The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Первый элемент можно удалить с помощью std::pop_heap()Original:the first element can be removed using std::pop_heap()The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
-
Фактическое расположение элементов, определяется реализацией.
Original:
The actual arrangement of the elements is implementation defined.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[править] Пример
#include <iostream> #include <algorithm> int main() { std::vector<int> v { 3, 1, 4, 1, 5, 9 }; std::cout << "initially, v: "; for (auto i : v) std::cout << i << ' '; std::cout << '\n'; std::make_heap(v.begin(), v.end()); std::cout << "after make_heap, v: "; for (auto i : v) std::cout << i << ' '; std::cout << '\n'; std::pop_heap(v.begin(), v.end()); auto largest = v.back(); v.pop_back(); std::cout << "largest element: " << largest << '\n'; std::cout << "after removing the largest element, v: "; for (auto i : v) std::cout << i << ' '; std::cout << '\n'; }
Вывод:
initially, v: 3 1 4 1 5 9 after make_heap, v: 9 5 4 1 1 3 largest element: 9 after removing the largest element, v: 5 3 4 1 1
[править] См. также
Получается куча в отсортированный диапазон элементов Original: turns a heap into a sorted range of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (шаблон функции) |