#include <algorithm>
#include <functional>
#include <iostream>
#include <iterator>
#include <list>
using namespace std;
class Employee
{
public:
Employee( const string& name = "", int sales = 0,int district = 0 );
bool operator>( const Employee& rhs ) const;
void print() const;
private:
int district_;
string name_;
int sales_;
};
inline
Employee::Employee( const string& name, int sales,
int district )
: district_( district ), name_( name ), sales_( sales )
{}
inline
bool Employee::operator>( const Employee& rhs ) const
{ return sales_ > rhs.sales_; }
inline
void Employee::print() const
{ cout << name_ << " from District " << district_
<< " has sales of $" << sales_ << endl;
}
int main( )
{
list<Employee> list1;
list1.push_back( Employee( "A", 3, 1 ) );
list1.push_back( Employee( "B", 4, 1 ) );
list1.push_back( Employee( "C", 8, 1 ) );
list1.sort( greater<Employee>() );
for_each( list1.begin(), list1.end(), mem_fun_ref( &Employee::print ) );
const int top_positions = 3;
list<Employee>::iterator position = list1.begin();
advance( position, top_positions );
list1.erase( position, list1.end() );
for_each( list1.begin(), list1.end(),mem_fun_ref( &Employee::print ) );
}
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