std::vector<int> and int pointer

int *array = new int[5]{1, 2, 3, 4, 5}; int n = 5; // 1 std::vector<int> list(array, array + n); // 2 std::vector<int> list2; list2.reserve(n); for (int i = 0; i < n; ++i) { list2.push_back(array[i]); } // 3 std::vector<int> list3; list3.assign(array, array + n); // 4 std::vector<int> list4(n); std::copy(array, array + n, list4.begin());

std::vector<int> vector = {1, 2, 3, 4, 5}; // 1 int *array = new int[vector.size()]; for (int i = 0; i < vector.size(); ++i) { array[i] = vector[i]; } // 2 int *array2 = new int[vector.size()]; std::copy(vector.begin(), vector.end(), array2); // 3 int *array3 = new int[vector.size()]; memcpy(array3, vector.data(), vector.size() * sizeof(int));