The multiset::empty() function is a built-in function in C++ STL which checks if the multiset is empty or not. It returns true if the multiset is empty, else it returns false.
Syntax:
multiset_name.empty()
Parameters: The function does not accept any parameter.
Return Value: The function returns true if the multiset is empty, else it returns false.
Below programs illustrates the multiset::empty() function:
Program 1:
C++
// C++ program to demonstrate the // multiset::empty() function #include <bits/stdc++.h> using namespace std;
int main()
{ int arr[] = { 15, 10, 15, 11, 10, 18, 18, 20, 20 };
// initializes the set from an array
multiset< int > s(arr, arr + 9);
if (!s.empty())
cout << "The multiset is not empty" ;
else
cout << "The multiset is empty" ;
return 0;
} |
Output:
The multiset is not empty
Program 2:
C++
// C++ program to demonstrate the // multiset::empty() function #include <bits/stdc++.h> using namespace std;
int main()
{ // declaration
multiset< int > s;
if (!s.empty())
cout << "The multiset is not empty" ;
else
cout << "The multiset is empty" ;
return 0;
} |
Output:
The multiset is empty