C++中使用stl的set和hash_set

#include<iostream>
#include<set>
#include<string>
#include<iterator>
#include<algorithm>//set_union()

using namespace std;

void main(){
string s1[3]={"aaa","bbb","ccc"};
string s2[3]={"bbb","ddd","eee"};

set<string> sa(s1,s1+3);//申明一个set集合，元素为数组s1
set<string> sb(s2,s2+3);//申明一个set集合,元素为数组s2
set<string>	sc;//申明一个空set集合

cout<<"输出sa的元素:";
copy(sa.begin(),sa.end(),ostream_iterator<string>(cout," "));

cout<<"\n\n输出sb的元素:";
copy(sb.begin(),sb.end(),ostream_iterator<string>(cout," "));

cout<<"\n\n输出sa和sb的并集:";
set_union(sa.begin(),sa.end(),sb.begin(),sb.end(),ostream_iterator<string>(cout," "));

cout<<"\n\n输出sa和sb的交集:";
set_intersection(sa.begin(),sa.end(),sb.begin(),sb.end(),ostream_iterator<string>(cout," "));

cout<<"\n\n输出sa-sb:";
set_difference(sa.begin(),sa.end(),sb.begin(),sb.end(),ostream_iterator<string>(cout," "));

cout<<"\n\n输出sb-sa:";
set_difference(sb.begin(),sb.end(),sa.begin(),sa.end(),ostream_iterator<string>(cout," "));

set_union(sa.begin(),sa.end(),sb.begin(),sb.end(),insert_iterator<set<string>>(sc,sc.begin()));
sc.insert("fff");
copy(sc.begin(),sc.end(),ostream_iterator<string>(cout," "));
cout<<endl;
cout<<"\n输出处理后的sc：";
copy(sc.lower_bound("ddd"),sc.upper_bound("fff"),ostream_iterator<string>(cout," "));
cout<<endl<<endl;

}

#include<iostream>
#include<string>
#include<iterator>
#include<algorithm>
#include<hash_set>
#include<windows.h>

using namespace std;

void main(){

const int N= 3;
int s1
={1,2,3};
int s2
={4,5,6};
hash_set<int>sa(s1,s1+N);//申明一个集合sa,元素为数组s1
hash_set<int>sb(s2,s2+N);//申明一个集合sb，元素为数组s2
hash_set<int> sc;//申明一个集合sc，为空集合

ostream_iterator<int> output(cout," ");
cout<<"输出集合sa的元素:";
copy(sa.begin(),sa.end(),output);

cout<<"\n\n输出集合sb的元素:";
copy(sb.begin(),sb.end(),output);
cout<<endl;

system("pause");

}