std::minmax

 

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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
Modifying sequence operations
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
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C library
qsort	bsearch

 

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

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

Parameters

a, b	-	the values to compare
ilist	-	initializer list with the values to compare
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. ​

Return value

1-2) 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.

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) Constant

3-4) Linear in ilist.size()

Possible implementation

First version
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); }

See also

min	returns the smaller of two elements (function template)
max	returns the larger of two elements (function template)