?? chapter9-28.cpp
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//文件名:CHAPTER9-28.cpp
#include <set>
#include <iostream>
#if _MSC_VER > 1020 // if VC++ version is > 4.2
using namespace std; // std c++ libs implemented in std
#endif
int main( )
{
typedef multiset<int, less<int> > IntSet;
IntSet ms1;
multiset <int> :: const_iterator ms1_RcIter;
ms1.insert( 10 );
ms1.insert( 20 );
ms1.insert( 30 );
pair <IntSet::const_iterator, IntSet::const_iterator> p1, p2;
p1 = ms1.equal_range( 20 );
cout << "The upper bound of the element with "
<< "a key of 20 in the multiset ms1 is: "<< *( p1.second ) << "." << endl;
cout << "The lower bound of the element with "
<< "a key of 20 in the multiset ms1 is: "<< *( p1.first ) << "." << endl;
// If no match is found for the key,
// both elements of the pair return end( )
if ( ( p2.first == ms1.end( ) ) && ( p2.second == ms1.end( ) ) )
cout << "The multiset ms1 doesn't have an element "<< "with a key less than 40." << endl;
else
cout << "The element of multiset ms1 with a key >= 40 is: "<< *( p1.first ) << "." << endl;
}
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