#include<bits/stdc++.h>
using namespace std;
int main() {
	set<int> s;
	set<int>::const_iterator iter;
	set<int>::iterator first;
	set<int>::iterator second;
	for(int i = 1 ; i <= 10 ; ++i) {
		s.insert(i);
	}
	//第一种删除
	s.erase(s.begin());
	//第二种删除
	first = s.begin();
	second = s.begin();
	second++;
	second++;
	s.erase(first,second);
	//第三种删除
	s.erase(8);
	cout<<"删除后 set 中元素是 ：";
	for(iter = s.begin() ; iter != s.end() ; ++iter) {
		cout<<*iter<<" ";
	}
	cout<<endl;
	return 0;
}