std::is_heap

 

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Funktionen Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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all_of any_of none_of (C++11) (C++11) (C++11) for_each count count_if mismatch equal	find find_if find_if_not (C++11) find_end find_first_of adjacent_find search search_n
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copy copy_if (C++11) copy_n (C++11) copy_backward move (C++11) move_backward (C++11) fill fill_n transform generate generate_n remove remove_if remove_copy remove_copy_if	replace replace_if replace_copy replace_copy_if swap swap_ranges iter_swap reverse reverse_copy rotate rotate_copy random_shuffle shuffle   (C++11) unique unique_copy
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is_heap is_heap_until (C++11) make_heap	push_heap pop_heap sort_heap
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definiert in Header <algorithm>
template<class RandomIt > bool is_heap( RandomIt first, RandomIt last );	(1)
template<class RandomIt, class Compare > bool is_heap( RandomIt first, RandomIt last, Compare comp );	(2)

Prüft, ob die Elemente im Bereich [first, last) sind ein Haufen .

Original:

Checks if the elements in range [first, last) are a heap.

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Die erste Version von is_heap verwendet operator< zum Vergleichen von Elementen, während die zweite verwendet die angegebene Vergleichs-Funktion comp .

Original:

The first version of is_heap uses operator< to compare elements, whereas the second uses the given comparison function comp.

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Parameter

first, last	-	das Spektrum der Elemente zu untersuchen Original: the range of elements to examine 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:  bool cmp(const Type1 &a, const Type2 &b); The signature does not need to have const&, but the function must not modify the objects passed to it. The types Type1 and Type2 must be such that an object of type RandomIt can be dereferenced and then implicitly converted to both of them. ​
Type requirements
- RandomIt must meet the requirements of RandomAccessIterator.

Rückgabewert

true wenn der Bereich Heap ist, false sonst .

Original:

true if the range is heap, false otherwise.

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Komplexität

Linear im Abstand first und last

Original:

Linear in the distance between first and last

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Notes

A Haufen ist ein Bereich von Elementen [f,l) das hat die folgenden Eigenschaften:

Original:

A heap is a range of elements [f,l) that has the following properties:

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• *f ist das größte Element in dem Bereich

  Original:

  *f is the largest element in the range

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• ein neues Element hinzugefügt mit std::push_heap() werden

  Original:

  a new element can be added using std::push_heap()

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• das erste Element kann mit Hilfe std::pop_heap() werden

  Original:

  the first element can be removed using std::pop_heap()

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Die tatsächliche Anordnung der Elemente ist die Umsetzung definiert .

Original:

The actual arrangement of the elements is implementation defined.

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Beispiel

#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';   if(!std::is_heap(v.begin(), v.end())){std::cout<<"making heap...\n";std::make_heap(v.begin(), v.end());}   std::cout<<"after make_heap, v: ";for(auto i : v)std::cout<< i <<' ';std::cout<<'\n';}

Output:

initially, v: 3 1 4 1 5 9 making heap... after make_heap, v: 9 5 4 1 1 3

Siehe auch

is_heap_until (C++11)	findet den größten Teilbereich, der Haufen ist Original: finds the largest subrange that is heap The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template)