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min_element (3)
  • >> min_element (3) ( Solaris man: Библиотечные вызовы )
  • 
                           Standard C++ Library
                 Copyright 1998, Rogue Wave Software, Inc.
    
    
    NAME
         min_element
    
          - Finds the minimum value in a range.
    
    
    
    SYNOPSIS
         #include <algorithm>
         template <class ForwardIterator>
         ForwardIterator
          min_element(ForwardIterator first, ForwardIterator last);
    
         template <class ForwardIterator, class Compare>
         InputIterator
          min_element(ForwardIterator first, ForwardIterator last,
                     Compare comp);
    
    
    
    DESCRIPTION
         The min_element algorithm returns an iterator  that  denotes
         the  minimum element in a sequence. If the sequence contains
         more than one copy of  the  minimum  element,  the  iterator
         points to the first occurrence of the element. In the second
         version of the function, the optional argument comp  defines
         a  comparison  function  that  can  be  used in place of the
         default operator<.
    
         Algorithm min_element returns the first iterator  i  in  the
         range [first, last) such that for any iterator j in the same
         range, the following corresponding conditions hold:
    
         !(*j < *i)
    
         or
    
         comp(*j, *i) == false.
    
    
    
    COMPLEXITY
         min_element performs exactly max((last  -  first)  -  1,  0)
         applications of the corresponding comparisons.
    
    EXAMPLE
         //
         // max_elem.cpp
         //
          #include <algorithm>
          #include <vector>
          #include <iostream>
         using namespace std;
    
         int main(void)
          {
           typedef vector<int>::iterator iterator;
           int d1[5] = {1,3,5,32,64};
    
            // set up vector
           vector<int>      v1(d1,d1 + 5);
    
            // find the largest element in the vector
           iterator it1 = max_element(v1.begin(), v1.end());
            // it1 = v1.begin() + 4
    
            // find the largest element in the range from
            // the beginning of the vector to the 2nd to last
           iterator it2 = max_element(v1.begin(), v1.end()-1,
                              less<int>());
            // it2 = v1.begin() + 3
    
            // find the smallest element
           iterator it3 = min_element(v1.begin(), v1.end());
            // it3 = v1.begin()
    
            // find the smallest value in the range from
            // the beginning of the vector plus 1 to the end
           iterator it4 = min_element(v1.begin()+1, v1.end(),
                              less<int>());
            // it4 = v1.begin() + 1
    
           cout << *it1 << " " << *it2 << " "
                 << *it3 << " " << *it4 << endl;
    
           return 0;
          }
    
         Program Output
    
    
    
         64 32 1 3
    
    
    
    WARNINGS
         If your compiler does not support default  template  parame-
         ters,  then you always need to supply the Allocator template
         argument. For instance, you have to write:
    
         vector<int,allocator<int> >
    
         instead of:
    
         vector<int>
    
         If your compiler does not support namespaces,  then  you  do
         not need the using declaration for std.
    
    
    
    SEE ALSO
         max, max_element, min
    
    
    
    


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