C++中使用stl的set和hash_set

set的使用：
 
 
[cpp] 
#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<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;
 
}
 
 
 
 
 
 
 
 
 
 hash_set （在Dev C++ 和Linux记得加上 using namespace __gnu_cxx; ）：
 
 
 
[cpp] 
#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[N]={1,2,3};  
    int s2[N]={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");  
  
}

补充：软件开发 , C++ ,