Returns the number of elements in the set.
size_type size( ) const;
Return Value
The current length of the set.
Example
// set_size.cpp
// compile with: /EHsc
#include <set>
#include <iostream>
int main( )
{
using namespace std;
set <int> s1;
set <int> :: size_type i;
s1.insert( 1 );
i = s1.size( );
cout << "The set length is " << i << "." << endl;
s1.insert( 2 );
i = s1.size( );
cout << "The set length is now " << i << "." << endl;
}
The set length is 1. The set length is now 2.
Requirements
Header: <set>
Namespace: std