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std::min

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< cpp‎ | algorithm

 
 
Biblioteca algoritmo
Funções
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Functions
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Não modificar operações de seqüência
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Non-modifying sequence operations
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Modificando operações de seqüência
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Modifying sequence operations
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Particionamento operações
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Partitioning operations
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Operações de classificação (em intervalos ordenados)
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Sorting operations (on sorted ranges)
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Binários operações de busca (em intervalos ordenados)
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Binary search operations (on sorted ranges)
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Definir operações (em intervalos ordenados)
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Set operations (on sorted ranges)
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Operações de pilha
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Heap operations
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Mínimo / máximo de operações
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Minimum/maximum operations
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Operações numéricas
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Numeric operations
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C biblioteca
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C library
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Defined in header <algorithm>
template< class T >
const T& min( const T& a, const T& b );
(1)
template< class T, class Compare >
const T& min( const T& a, const T& b, Compare comp );
(2)
template< class T >
T min( std::initializer_list<T> ilist);
(3) (a partir do C++ 11)
template< class T, class Compare >
T min( std::initializer_list<T> ilist, Compare comp );
(4) (a partir do C++ 11)
1-2)
Retorna o menor dos dois valores.
Original:
Returns the smaller of the two values.
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3-4)
Retorna o menor dos valores na lista de inicializador ilist.
Original:
Returns the smallest 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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Índice

[editar] Parâmetros

a, b -
os valores para comparar
Original:
the values to compare
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ilist -
inicializador lista com os valores para comparar
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initializer list with the values to compare
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cmp - 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)

[editar] Valor de retorno

1-2)
O menor dos a e b. Se os valores são equivalentes, os retornos a.
Original:
The smaller of a and b. If the values are equivalent, returns a.
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3-4)
O menor valor em ilist. Se vários valores são equivalentes ao menor, retorna o valor mais à esquerda tal.
Original:
The smallest value in ilist. If several values are equivalent to the smallest, returns the leftmost such value.
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[editar] Complexidade

1-2)
Constante
Original:
Constant
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3-4)
Linear em ilist.size()
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Linear in ilist.size()
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[editar] Possível implementação

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

[editar] Exemplo

#include <algorithm>
#include <iostream>
 
int main()
{
    std::cout << "smaller of 1 and 9999: " << std::min(1, 9999) << '\n';
    std::cout << "smaller of 'a' and 'b': " << std::min('a', 'b') << '\n';
    std::cout << "smaller of 3.5 and 2.5: " << std::min(3.5, 2.5) << '\n';
}

Output:

smaller of 1 and 9999: 1
smaller of 'a' and 'b': a
smaller of 3.5 and 2.5: 2.5

[editar] Veja também

devolve o maior dos dois elementos
Original:
returns the larger of two elements
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(modelo de função) [edit]
(C++11)
retorna o. maior e o menor dos dois elementos
Original:
returns the larger and the smaller of two elements
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(modelo de função) [edit]
retorna o elemento mais pequeno de um intervalo
Original:
returns the smallest element in a range
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(modelo de função) [edit]