hash_multimap::size
Returns the number of elements in the hash_multimap.
size_type size( ) const;
Return Value
The current length of the hash_multimap.
Remarks
In Visual C++ .NET 2003, members of the <hash_map> and <hash_set> header files are no longer in the std namespace, but rather have been moved into the stdext namespace. See The stdext Namespace for more information.
Example
When compiling this example with the /Wp64 flag or on a 64-bit platform, compiler warning C4267 will be generated. For more information on this warning, see Compiler Warning (level 3) C4267.
// hash_multimap_size.cpp
// compile with: /EHsc
#define _DEFINE_DEPRECATED_HASH_CLASSES 0
#include <hash_map>
#include <iostream>
int main( )
{
using namespace std;
using namespace stdext;
hash_multimap<int, int> hm1, hm2;
hash_multimap<int, int>::size_type i;
typedef pair<int, int> Int_Pair;
hm1.insert(Int_Pair(1, 1));
i = hm1.size();
cout << "The hash_multimap length is " << i << "." << endl;
hm1.insert(Int_Pair(2, 4));
i = hm1.size();
cout << "The hash_multimap length is now " << i << "." << endl;
}
The hash_multimap length is 1.
The hash_multimap length is now 2.
Requirements
Header: <hash_map>
Namespace: stdext