set::rbegin and set::rend
Illustrates how to use the set::rbegin and set::rend Standard Template Library (STL) functions in Visual C++.
template<class _K, class _Pr, class _A>
class set
{
public:
// Function 1:
const_reverse_iterator rbegin( ) const;
// Function 2:
const_reverse_iterator rend( ) const;
}
Remarks
Note
The class/parameter names in the prototype do not match the version in the header file. Some have been modified to improve readability.
The rbegin function returns a reverse bidirectional iterator that points just beyond the end of the controlled sequence. The rend function returns a reverse bidirectional iterator that points at the first element of the sequence.
Example
// SetRbeginRend.cpp
// compile with: /EHsc
//
// Illustrates how to use the rbegin function to get a reverse
// bidirectional iterator that points just beyond the end of
// the controlled sequence. It also illustrates how to use
// the rend function to get a reverse bidirectional iterator
// that points at the first element of the sequence.
//
// Functions:
//
// rbegin Returns a reverse bidirectional iterator that points
// just beyond the end of the controlled sequence.
// rend Returns a reverse bidirectional iterator that points
// at the first element of the sequence.
//
//////////////////////////////////////////////////////////////////////
#pragma warning(disable:4786)
#include <set>
#include <iostream>
using namespace std ;
typedef set<int> SET_INT;
int main() {
SET_INT s1;
SET_INT::reverse_iterator i;
cout << "s1.insert(5)" << endl;
s1.insert(5);
cout << "s1.insert(10)" << endl;
s1.insert(10);
cout << "s1.insert(15)" << endl;
s1.insert(15);
cout << "s1.insert(20)" << endl;
s1.insert(20);
// displays: 20,15,10,5
for (i=s1.rbegin();i!=s1.rend();i++)
cout << "s1 has " << *i << " in its set." << endl;
}
Output
s1.insert(5)
s1.insert(10)
s1.insert(15)
s1.insert(20)
s1 has 20 in its set.
s1 has 15 in its set.
s1 has 10 in its set.
s1 has 5 in its set.
Requirements
Header: <set>