min_element (3C++std) - Tru64 UNIX
Standard C++ LibraryCopyright 1996, 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<. This function can be used with all the datatypes provided by
the standard library.
Algorithm min_element returns the first iterator i in the range [first,
last) such that for any iterator j in the range 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.h>
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;
}
Output :
64 32 1 3
WARNING
If your compiler does not support default template parameters then you need
to always supply the Allocator template argument. For instance you'll have
to write:
vector<int,allocator<int> >
instead of:
vector<int>
SEE ALSO
max, max_element, min
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
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