multiset get_allocator() function in C++ STL

The multiset::get_allocator() method in C++ STL is a built-in function in C++ STL which returns a copy of the allocator object associated with the multiset.

Syntax:

multiset_name.get_allocator()

where allocator_type is the type of the allocator used by the container.

Parameters: The function does not take any parameter.

Return Value: This method returns the allocator object used to construct the container.

Below programs illustrate the multiset::get_allocator() function:
Program 1:

// CPP code to illustrate multiset::get_allocator

#include <iostream>
#include <set>
using namespace std;

int main()
{
    multiset<int> mymultiset;
    int* p;
    unsigned int i;

    // allocate an array of 5 elements
    // using myset's allocator:
    p = mymultiset
            .get_allocator()
            .allocate(5);

    // assign some values to array
    p[0] = 10;
    p[1] = 10;
    p[2] = 20;
    p[3] = 30;
    p[4] = 20;

    cout << "The allocated array contains: ";
    for (i = 0; i < 5; i++) {

        cout << p[i] << " ";
    }
    cout << endl;

    mymultiset.get_allocator().deallocate(p, 5);

    return 0;
}

Output:

The allocated array contains: 10 10 20 30 20

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