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18.4

//functor.cpp--using a-functor
#include <iostream>
#include <list>
#include <iterator>
#include <algorithm>
int main(){
	using namespace std;
	int vals[10]={50,100,90,180,60,210,415,88,188,201};
	list<int> yadayada(vals,vals+10);
	list<int> etcetera(vals,vals+10);
	cout<<"Original lists:\n";
	for_each(yadayada.begin(),yadayada.end(),[](int x){std::cout<<x<<" ";});
	cout<<endl;
	for_each(etcetera.begin(),etcetera.end(),[](int x){std::cout<<x<<" ";});
	cout<<endl;
	yadayada.remove_if([](int x){return x>100;});
	etcetera.remove_if([](int x){return x>200;});
	cout<<"Trimmed lists:\n";
	for_each(yadayada.begin(),yadayada.end(),[](int x){std::cout<<x<<" ";});
	cout<<endl;
	for_each(etcetera.begin(),etcetera.end(),[](int x){std::cout<<x<<" ";});
	cout<<endl;
	return 0;
}