std::minmax
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Defined in header <algorithm>
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template< class T > std::pair<const T&,const T&> minmax( const T& a, const T& b ); |
(1) | (desde C++11) |
template< class T, class Compare > std::pair<const T&,const T&> minmax( const T& a, const T& b, Compare comp ); |
(2) | (desde C++11) |
template< class T > std::pair<T,T> minmax( std::initializer_list<T> ilist); |
(3) | (desde C++11) |
template< class T, class Compare > std::pair<T,T> minmax( std::initializer_list<T> ilist, Compare comp ); |
(4) | (desde C++11) |
1-2)
Devuelve el menor y el mayor de los dos valores .
Original:
Returns the smaller and the greater of the two values.
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3-4)
Devuelve la lista más pequeño y el más grande de los valores en el inicializador
ilist
.Original:
Returns the smallest and the greatest of the values in initializer list
ilist
.The text has been machine-translated via Google Translate.
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Las versiones (1,3) operator< utilizar para comparar los valores, mientras que las versiones (2,4) utilizar la función de comparación dado
comp
.Original:
The (1,3) versions use operator< to compare the values, whereas the (2,4) versions use the given comparison function
comp
.The text has been machine-translated via Google Translate.
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Contenido |
[editar] Parámetros
a, b | - | los 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 con los valores a 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)
Devuelve el resultado de std::make_pair(a, b) si
a<b
o si a
es equivalente a b
. Devuelve el resultado de std::make_pair(b, a) si b<a
.Original:
Returns the result of std::make_pair(a, b) if
a<b
or if a
is equivalent to b
. Returns the result of std::make_pair(b, a) if b<a
.The text has been machine-translated via Google Translate.
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3-4)
Un par con el valor más pequeño en
ilist
como el primer elemento y el más grande como el segundo. Si varios elementos son equivalentes a los más pequeños, el elemento tal extremo izquierdo se devuelve. Si varios elementos son equivalentes a la más grande, el elemento más a la derecha como se devuelve .Original:
A pair with the smallest value in
ilist
as the first element and the greatest as the second. If several elements are equivalent to the smallest, the leftmost such element is returned. If several elements are equivalent to the largest, the rightmost such element is returned.The text has been machine-translated via Google Translate.
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[editar] Complejidad
1-2)
Constant
Original:
Constant
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3-4)
Lineal en
ilist.size()
Original:
Linear in
ilist.size()
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[editar] Posible implementación
First version |
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template<class T> std::pair<const T&,const T&> minmax(const T& a, const T& b) { return (b < a) ? std::make_pair(b, a) : std::make_pair(a, b); } |
Second version |
template<class T, class Compare> std::pair<const T&,const T&> minmax(const T& a, const T& b, Compare comp) { return comp(b, a) ? std::make_pair(b, a) : std::make_pair(a, b); } |
Third version |
template< class T > std::pair<T,T> minmax( std::initializer_list ilist) { auto p = std::minmax_element(ilist.begin(), ilist.end()); return std::make_pair(*p.first, *p.second); } |
Fourth version |
template< class T, class Compare > std::pair<T,T> minmax( std::initializer_list ilist, Compare comp ) { auto p = std::minmax_element(ilist.begin(), ilist.end(), comp); return std::make_pair(*p.first, *p.second); } |
[editar] Ejemplo
#include <algorithm> #include <iostream> #include <vector> #include <cstdlib> #include <ctime> int main() { std::vector<int> v {3, 1, 4, 1, 5, 9, 2, 6}; std::srand(std::time(0)); std::pair<int,int> bounds = std::minmax(std::rand() % v.size(), std::rand() % v.size()); std::cout << "v[" << bounds.first << "," << bounds.second << "]: "; for (int i = bounds.first; i < bounds.second; ++i) { std::cout << v[i] << ' '; } std::cout << '\n'; }
Possible output:
v[2,7]: 4 1 5 9 2
[editar] Ver también
devuelve el menor de los dos 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. (función de plantilla) | |
devuelve el mayor de los dos elementos Original: returns the larger 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. (función de plantilla) |