std::make_heap

 

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qsort	bsearch

 

Definido en la cabecera <algorithm>
template<class RandomIt > void make_heap( RandomIt first, RandomIt last );	(1)
template<class RandomIt, class Compare > void make_heap( RandomIt first, RandomIt last,                 Compare comp );	(2)

Construye un montón' en el [first, last) rango. La primera versión de la función utiliza operator< para comparar los elementos, el segundo utiliza la función de comparación dado 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.

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Parámetros

first, last	-	la gama de elementos para hacer que el montón de 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:  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. ​
Requerimientos de tipo
- RandomIt debe reunir los requerimientos de RandomAccessIterator.
- The type of dereferenced RandomIt must meet the requirements of MoveAssignable and MoveConstructible.

Valor de retorno

(Ninguno)

Original:

(none)

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Complejidad

En la mayoría de las comparaciones 3*std::distance(first, last) .

Original:

At most 3*std::distance(first, last) comparisons.

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Notas

Un montón' es una serie de elementos [f,l) que tiene las siguientes propiedades:

Original:

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

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• *f es el elemento más grande en el intervalo

  Original:

  *f is the largest element in the range

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• un elemento nuevo puede añadirse utilizando std::push_heap()

  Original:

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

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• el primer elemento se puede eliminar con std::pop_heap()

  Original:

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

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La disposición real de los elementos depende de la implementación .

Original:

The actual arrangement of the elements is implementation defined.

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Ejemplo

#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';}

Salida:

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

Ver también

sort_heap

Resulta un montón en una gama de elementos ordenados 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. (plantilla de función)