Vector 两容器求交集

 1 #include "set"
 2 #include "vector"
 3 #include <algorithm>
 4 using namespace std;
 5 
 6 int main(void) 
 7 { 
 8 int iarr1[]={1,2,3,3,4,5,6,7,9}; 
 9 int iarr2[]={1,4,3,9,10}; 
10 multiset<int> iset1(begin(iarr1),end(iarr1)); 
11 multiset<int> iset2(begin(iarr2),end(iarr2)); 
12 vector<int> ivec(20); 
13 auto iter=set_intersection(iset1.begin(),iset1.end(),iset2.begin(),iset2.end(),ivec.begin()); //ivec为：1,3,4,9 
14 ivec.resize(iter-ivec.begin());//重新确定ivec大小 
15 for (auto it = ivec.begin(); it != ivec.end(); it ++) {
16 
17 int d = *it;
18 printf("%d",d);
19 }
20 system("pause");
21 return 0; 
22 }