如果遍历map中最后一个元素rbegin(),end(),rend()

#include "stdafx.h"


#include 
#include 

        It does not point to any element, and thus shall not be dereferenced.

	Because the ranges used by functions of the standard library do not include the element pointed by their closing iterator,

        this function is often used in combination with map::begin to specify a range including all the elements in the container.

	If the container is empty, this function returns the same as map::begin.
	*/
	return 0;
}