程序代码：

using namespace std;
#include <set>
#include <iostream>
#include <ctime>
#include <iterator>

int main()
{
    typedef set<int> n_set;
    typedef ostream_iterator< n_set > ostream_itr;
    
    n_set n_set_test;
    srand(time(0));
    for(int i=0;i<10;i++)
    {
        int temp=rand()%1000;    
        n_set_test.insert(temp);
        cout<<temp<<"\n";
    }     
    copy(n_set_test.begin(),n_set_test.end(),ostream_itr(cout,"\n"));
    return 0; 
}