c++将两个vector向量连接

#include <iostream>
#include <vector>
int main(int argc, char **argv) {
    int arr[6] = {1,2,3,4,5,6};
    std::vector<int> v1(&arr[0],&arr[3]);
    std::vector<int> v2(&arr[3],&arr[5]);
    
    std::vector<int> v3;
    v3.insert(v3.end(),v1.begin(),v1.end());
    v3.insert(v3.end(),v2.begin(),v2.end());
    
    for(int i = 0; i < v3.size(); i++)
    {
        std::cout << v3[i] << ", ";
    }
    std::cout << std::endl;
    
    return 0;
}