set::clear
Erases all the elements of a set.
void clear( );
Example
// set_clear.cpp
// compile with: /EHsc
#include <set>
#include <iostream>
int main( )
{
using namespace std;
set <int> s1;
s1.insert( 1 );
s1.insert( 2 );
cout << "The size of the set is initially " << s1.size( )
<< "." << endl;
s1.clear( );
cout << "The size of the set after clearing is "
<< s1.size( ) << "." << endl;
}
The size of the set is initially 2. The size of the set after clearing is 0.
Requirements
Header: <set>
Namespace: std