std::max

 

C++

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Conceitos

Biblioteca de utilitários

Biblioteca cordas

Recipientes biblioteca

Biblioteca algoritmos

Biblioteca iteradores

Biblioteca numéricos

De entrada / saída da biblioteca

Biblioteca localizações

Biblioteca de expressões regulares (C++11)

Biblioteca operações atômica (C++11)

Biblioteca de suporte a discussão (C++11)

 

Biblioteca algoritmo

Funções Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Não modificar operações de seqüência Original: Non-modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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
Modificando operações de seqüência Original: Modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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
Particionamento operações Original: Partitioning operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_partitioned (C++11) partition partition_copy (C++11)	stable_partition partition_point (C++11)
Operações de classificação (em intervalos ordenados) Original: Sorting operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_sorted (C++11) is_sorted_until (C++11) sort	partial_sort partial_sort_copy stable_sort nth_element
Binários operações de busca (em intervalos ordenados) Original: Binary search operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
lower_bound upper_bound	binary_search equal_range
Definir operações (em intervalos ordenados) Original: Set operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
merge inplace_merge includes	set_difference set_intersection set_symmetric_difference set_union
Operações de pilha Original: Heap operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_heap is_heap_until (C++11) make_heap	push_heap pop_heap sort_heap
Mínimo / máximo de operações Original: Minimum/maximum operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
max max_element min min_element minmax (C++11) minmax_element (C++11)	lexicographical_compare is_permutation (C++11) next_permutation prev_permutation
Operações numéricas Original: Numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
iota (C++11) accumulate inner_product	adjacent_difference partial_sum
C biblioteca Original: C library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
qsort	bsearch

 

Defined in header <algorithm>
template< class T > const T& max( const T& a, const T& b );	(1)
template< class T, class Compare > const T& max( const T& a, const T& b, Compare comp );	(2)
template< class T > T max( std::initializer_list<T> ilist);	(3)	(a partir do C++ 11)
template< class T, class Compare > T max( std::initializer_list<T> ilist, Compare comp );	(4)	(a partir do C++ 11)

1-2)

Retorna o maior dos dois valores.

Original:

Returns the greater of the two values.

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3-4)

Retorna o maior dos valores na lista de inicializador ilist.

Original:

Returns the greatest of the values in initializer list ilist.

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As versões (1,3) usar operator< para comparar os valores, as versões (2,4) usar a função de comparação dada comp.

Original:

The (1,3) versions use operator< to compare the values, the (2,4) versions use the given comparison function comp.

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Parâmetros

a, b	-	os valores para comparar Original: the values to compare The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ilist	-	inicializador lista com os valores para comparar Original: initializer list with the values to compare 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 if a is less than b. 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 T can be implicitly converted to both of them. ​
Type requirements
- T must meet the requirements of LessThanComparable. for the overloads (1) and (3)
- T must meet the requirements of CopyConstructible. for the overloads (3) and (4)

Valor de retorno

1-2)

O maior dos a e b. Se eles são equivalentes, retorna a.

Original:

The greater of a and b. If they are equivalent, returns a.

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3-4)

O maior valor em ilist. Se vários valores são equivalentes ao maior, retorna a um mais à esquerda.

Original:

The greatest value in ilist. If several values are equivalent to the greatest, returns the leftmost one.

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Complexidade

1-2)

Constante

Original:

Constant

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3-4)

Linear em ilist.size()

Original:

Linear in ilist.size()

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Possível implementação

First version
template<class T> const T& max(const T& a, const T& b) { return (a < b) ? b : a; }
Second version
template<class T, class Compare> const T& max(const T& a, const T& b, Compare comp) { return (comp(a, b)) ? b : a; }
Third version
template< class T > T max( std::initializer_list<T> ilist) { return *std::max_element(ilist.begin(), ilist.end()); }
Fourth version
template< class T, class Compare > T max( std::initializer_list<T> ilist, Compare comp ) { return *std::max_element(ilist.begin(), ilist.end(), comp); }

Exemplo

#include <algorithm>
#include <iostream>
#include <string> 
int main()
{
    std::cout << "larger of 1 and 9999: " << std::max(1, 9999) << '\n'
              << "larger of 'a', and 'b': " << std::max('a', 'b') << '\n'
              << "longest of \"foo\", \"bar\", and \"hello\": " <<
                  std::max( { "foo", "bar", "hello" },
                            [](const std::string& s1, const std::string& s2) {
                                 return s1.size() < s2.size();
                             }) << '\n';
}

Output:

larger of 1 and 9999: 9999
larger of 'a', and 'b': b
longest of "foo", "bar", and "hello": hello

Veja também

min	retorna o menor dos dois elementos Original: returns the smaller of two elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função)
minmax (C++11)	retorna o. maior e o menor dos dois elementos Original: returns the larger and the smaller of two elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função)
max_element	retorna o maior elemento de um intervalo Original: returns the largest element in a range The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função)