std::max
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| Definido no cabe��alho <algorithm>
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| 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) | (desde C++11) |
| template< class T, class Compare > T max( std::initializer_list<T> ilist, Compare comp ); |
(4) | (desde C++11) |
Retorna o maior dos dois valores.
3-4) Original:
Returns the greater of the two values.
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Retorna o maior dos valores na lista de inicializador
ilist.Original:
Returns the greatest of the values in initializer list
ilist.The text has been machine-translated via Google Translate.
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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.The text has been machine-translated via Google Translate.
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Índice |
[editar] 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. |
| Type requirements | ||
-T must meet the requirements of LessThanComparable. for the overloads (1) and (3)
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-T must meet the requirements of CopyConstructible. for the overloads (3) and (4)
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[editar] Valor de retorno
1-2)O maior dos
3-4) a e b. Se eles são equivalentes, retorna a.Original:
The greater of
a and b. If they are equivalent, returns a.The text has been machine-translated via Google Translate.
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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.The text has been machine-translated via Google Translate.
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[editar] Complexidade
1-2)Constante
3-4) Original:
Constant
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Linear em
ilist.size()Original:
Linear in
ilist.size()The text has been machine-translated via Google Translate.
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[editar] 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); } |
[editar] 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'; }
Saída:
larger of 1 and 9999: 9999 larger of 'a', and 'b': b longest of "foo", "bar", and "hello": hello
[editar] Veja também
| 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) | |
| (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) |
| 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) | |
