C++ 用数组初始化vector的两种方式

int myints[] = { 10, 20, 30, 40, 50, 60, 70 };
//方法1
std::vector<int> myvector(7);
std::copy(myints, myints + 7, myvector.begin());
//方法2
vector<int> vec(begin(myints), end(myints));