STL: max和min

max

Compares two objects and returns the larger of the two, where the ordering criterion may be specified by a binary predicate.

template<class Type>
   const Type& max(
      const Type& _Left, 
      const Type& _Right
   );
template<class Type, class Pr>
   const Type& max(
      const Type& _Left, 
      const Type& _Right,
      BinaryPredicate _Comp
   );

min

Compares two objects and returns the lesser of the two, where the ordering criterion may be specified by a binary predicate.

template<class Type>
   const Type& min(
      const Type& _Left, 
      const Type& _Right
   );
template<class Type, class Pr>
   const Type& min(
      const Type& _Left, 
      const Type& _Right,
      BinaryPredicate _Comp
   );

max和min还可以比较集合的大小。比如：set,multiset,vector,list,queue,stack,map,multimap.因为集合重载了比较操作符。此外，string,非STL标准的hash_set,hash_map都可以。

minmax

Compares two input parameters and returns them as a pair, in order of least to greatest.

template<class Type>
    pair<const Type&, const Type&>
        minmax(
            const Type& _Left,
            const Type& _Right
);
template<class Type, class BinaryPredicate>
    pair<const Type&, const Type&>
        minmax(
            const Type& _Left,
            const Type& _Right,
            BinaryPredicate _Comp
)

max_element

Finds the first occurrence of largest element in a specified range where the ordering criterion may be specified by a binary predicate.

template<class ForwardIterator>
   ForwardIterator max_element(
      ForwardIterator _First, 
      ForwardIterator _Last
   );
template<class ForwardIterator, class BinaryPredicate>
   ForwardIterator max_element(
      ForwardIterator _First, 
      ForwardIterator _Last, 
      BinaryPredicate _Comp
   );

min_element

Finds the first occurrence of smallest element in a specified range where the ordering criterion may be specified by a binary predicate.

template<class ForwardIterator>
   ForwardIterator min_element(
      ForwardIterator first, 
      ForwardIterator last
   );
template<class ForwardIterator, class BinaryPredicate>
   ForwardIterator min_element(
      ForwardIterator first, 
      ForwardIterator last,
      BinaryPredicate comp
   );

minmax_element

Performs the work performed by min_element and max_element in one call.

template<class ForwardIterator>
    pair< ForwardIterator, ForwardIterator >
        minmax_element(
            ForwardIterator _First, 
            ForwardIterator _Last
 );
template<class ForwardIterator, class BinaryPredicate>
    pair< ForwardIterator, ForwardIterator >
        minmax_element(
            ForwardIterator _First, 
            ForwardIterator _Last, 
            BinaryPredicate _Comp