The multiset::size() is a built-in function in C++ STL which returns the number of elements in the multiset container.
Syntax:
CPP
CPP
multiset_name.size()Parameters: The function does not accept any parameters. Return Value: The function returns the number of elements in the multiset container. Below programs illustrate the above function: Program 1:
// CPP program to demonstrate the
// multiset::size() function
#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);
cout << "The size of multiset: " << s.size();
s.insert(13);
s.insert(25);
cout << "\nThe size of multiset: " << s.size();
s.insert(24);
cout << "\nThe size of multiset: " << s.size();
return 0;
}
Output:
Program 2:
The size of multiset: 2 The size of multiset: 4 The size of multiset: 5
// CPP program to demonstrate the
// multiset::size() function
#include <bits/stdc++.h>
using namespace std;
int main()
{
multiset<int> s;
cout << "The size of multiset: " << s.size();
s.insert(2);
s.insert(3);
cout << "\nThe size of multiset: " << s.size();
s.insert(4);
cout << "\nThe size of multiset: " << s.size();
return 0;
}
Output:
All functions of std::multisetThe size of multiset: 0 The size of multiset: 2 The size of multiset: 3
