C ++库，用于将数组内容复制到指针

Question

int a[4]={1,2,3,4};
int* b = new int[4];

Is there any library function like std::copy to copy the elements from an array a at to pointer b in c++ ?

Answer 1

Yes there is, it's called std::vector<> ; you would use it in your code as follows:

std::vector<int> a { 1, 2, 3, 4 };
auto b = a;

Answer 2

Is there any library function like std::copy to copy the elements from an array a at to pointer b in c++ ?

Yes, that's std::copy :

 std::copy( std::begin( a ), std::end( a ), b );