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Difference between revisions of "cpp/algorithm/minmax"

From cppreference.com
< cpp‎ | algorithm
(equivalence, and functions)
m (typo)
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===Return value===
 
===Return value===
1-2) Returns the result of {{cpp|std::make_pair(a, b)}} if {{tt|a<b}} or if {{tt|a}} is equivalent to {{tt|b}}. Returns the result of {cpp|std::make_pair(b, a)}} if {{tt|b<a}}.
+
1-2) Returns the result of {{cpp|std::make_pair(a, b)}} if {{tt|a<b}} or if {{tt|a}} is equivalent to {{tt|b}}. Returns the result of {{cpp|std::make_pair(b, a)}} if {{tt|b<a}}.
  
 
3-4) A pair with the smallest value in {{tt|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.
 
3-4) A pair with the smallest value in {{tt|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.

Revision as of 10:44, 24 August 2011

Template:cpp/algorithm/sidebar Template:ddcl list begin <tr class="t-dsc-header">

<td>
Defined in header <algorithm>
</td>

<td></td> <td></td> </tr> <tr class="t-dcl ">

<td >
template< class T >
std::pair<const T&,const T&> minmax( const T& a, const T& b );
</td>

<td > (1) </td> <td > Template:mark c++11 feature </td> </tr> <tr class="t-dcl ">

<td >
template< class T, class Compare >
std::pair<const T&,const T&> minmax( const T& a, const T& b, Compare comp );
</td>

<td > (2) </td> <td > Template:mark c++11 feature </td> </tr> <tr class="t-dcl ">

<td >
template< class T >
std::pair<T,T> minmax( std::initializer_list ilist);
</td>

<td > (3) </td> <td > Template:mark c++11 feature </td> </tr> <tr class="t-dcl ">

<td >
template< class T, class Compare >
std::pair<T,T> minmax( std::initializer_list ilist, Compare comp );
</td>

<td > (4) </td> <td > Template:mark c++11 feature </td> </tr> Template:ddcl list end

1-2) Returns the smaller and the greater of the two values.

3-4) Returns the smallest and the greatest of the values in initializer list ilist.

The (1,3) versions use Template:cpp to compare the values, the (2,4) versions use the given comparison function comp.

Contents

Parameters

a, b - the values to compare
ilist - initializer list with the values to compare
cmp - comparison function object (i.e. an object that satisfies the requirements of Compare) 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);

While the signature does not need to have const&, the function must not modify the objects passed to it and must be able to accept all values of type (possibly const) Type1 and Type2 regardless of value category (thus, Type1& is not allowed, nor is Type1 unless for Type1 a move is equivalent to a copy(since C++11)).
The types Type1 and Type2 must be such that an object of type T can be implicitly converted to both of them.

Return value

1-2) Returns the result of Template:cpp if a<b or if a is equivalent to b. Returns the result of Template:cpp if b<a.

3-4) 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.

Complexity

1-2) Template:complex constant

3-4) Linear in ilist.size()

Equivalent function

Template:eq fun cpp

Example

Template:example cpp

See also

Template:cpp/algorithm/dcl list minTemplate:cpp/algorithm/dcl list max