multiset max_size() in C++ STL with Examples

The multiset::max_size() is a built-in function in C++ STL which returns the maximum number of elements a multiset container can hold.

Syntax:

multiset_name.max_size()

Parameters: The function does not accept any parameters.

Return Value: The function returns the maximum number of elements a multiset container can hold.

Below programs illustrate the above function:

Program 1:

// CPP program to demonstrate the
// multiset::max_size() function
// when multiset is non-empty
#include <bits/stdc++.h>
using namespace std;
int main()
{

    multiset<int> s;

    // Function to insert elements
    // in the multiset container
    s.insert(10);
    s.insert(13);
    s.insert(13);
    s.insert(25);
    s.insert(24);

    cout << "The multiset elements are: ";
    for (auto it = s.begin(); it != s.end(); it++)
        cout << *it << " ";

    cout << "\nThe max size of multiset: " << s.max_size();
    return 0;
}

Output:

The multiset elements are: 10 13 13 24 25 
The max size of multiset: 461168601842738790

Program 2:

// CPP program to demonstrate the
// multiset::max_size() function
// when multiset is empty
#include <bits/stdc++.h>
using namespace std;
int main()
{

    multiset<int> s;

    cout << "\nThe max size of multiset: " << s.max_size();
    return 0;
}

Output:

The max size of multiset: 461168601842738790

All functions of multiset