如何在C ++中使用STL在两个向量之间找到共同的元素？
在本教程中，我们将讨论一个程序，以了解如何使用C++中的STL在两个向量之间查找公共元素。
为了找到两个给定向量之间的公共元素，我们将使用set_intersetion()方法。
示例
#include <bits/stdc++.h>
using namespace std;
int main(){
//defining the vectors
vector<int> vector1 = { 1, 45, 54, 71, 76, 12 };
vector<int> vector2 = { 1, 7, 5, 4, 6, 12 };
sort(vector1.begin(), vector1.end());
sort(vector2.begin(), vector2.end());
cout << "First Vector: ";
for (int i = 0; i < vector1.size(); i++)
cout << vector1[i] << " ";
cout << endl;
cout << "Second Vector: ";
for (int i = 0; i < vector2.size(); i++)
cout << vector2[i] << " ";
cout << endl;
vector<int> v(vector1.size() + vector2.size());
vector<int>::iterator it, st;
//finding the common elements
it = set_intersection(vector1.begin(), vector1.end(), vector2.begin(), vector2.end(), v.begin());
cout << "\nCommon elements:\n";
for (st = v.begin(); st != it; ++st)
cout << *st << ", ";
cout << '\n';
return 0;
}输出结果
First Vector: 1 12 45 54 71 76 Second Vector: 1 4 5 6 7 12 Common elements: 1, 12,