c++打印容器元素的方法

#include <bits/stdc++.h>
using namespace std;

int main()
{
    vector<int> a = {1, 2, 3, 4, 5, 6};
    //使用std::copy和std::ostream_iterator
    ostream_iterator<int> output(cout, " ");
    copy(a.begin(), a.end(), output);
    cout << endl;
    //使用for_each
    for_each(a.begin(), a.end(), [](int val)
             { cout << val << " "; });
    cout << endl;
}