有关于vector

问大家个问题
vector<string> s1;
vector<string> s2;
假如s1是s2的超集，如果要把s1中不属于s2的部分取出来 怎么做好
什么方法都可以

 1 #include<vector>
 2 #include<string>
 3 #include<algorithm>
 4 #include<iterator>
 5 #include<iostream>
 6 using namespace std;
 7 
 8 int main() 
 9 { 
10     vector <string> s1; 
11     vector <string> s2; 
12     s1.push_back("1");
13     s1.push_back("2");
14     s1.push_back("3");
15     
16     s2.push_back("1");
17     s2.push_back("2");
18     s2.push_back("3");
19     s2.push_back("4");
20     s2.push_back("5");
21     s2.push_back("6");
22     
23     sort( s1.begin(),s1.end() ); 
24     sort( s2.begin(),s2.end() ); 
25     vector <string> out; 
26     set_difference( s2.begin(),s2.end(),s1.begin(),s1.end() , back_inserter(out) ); 
27     copy(out.begin(),out.end(),ostream_iterator<string>( cout," " ) );
28 }

转载于:https://www.cnblogs.com/wangshuai901/archive/2012/02/04/2337799.html