How to combine three one-dimensional arrays into one?

Question

C++ / C#

How to combine three one-dimensional arrays into one?

Answer 1

Create an array with enough elements and copy the three arrays to be combined into it :)
PS I advise you to use std::vector.

Answer 2

std::vector<int> dest = {1,2,3};
std::vector<int> src = {4,5,6};
std::vector<int> src2 = {6,7,8};

dest.insert( dest.end(), src.begin(), src.end() );
dest.insert( dest.end(), src2.begin(), src2.end() );

Answer 3

I would dump them one by one into one array or vector
www.cplusplus.com/reference/algorithm/copy
and then call the function
twice www.cplusplus.com/reference/algorithm/inplace_merge
If the arrays are length 10, 15 and 20 then …
• First time - std::inplace_merge(v.begin(), v.begin() + 10, v.begin() + 10 + 15);
• Second time - std::inplace_merge(v.begin(), v.begin() + 10 + 15, v.begin() + 10 + 15 + 20);

Answer 4

www.cplusplus.com/reference/algorithm/copy

Answer 5

STL will help you

const std::vector<int> 
first{ 1, 2, 3 }, second{ 4, 5, 6 }, third{ 7, 8, 9 };

std::vector<int> result=first;
std::copy(second.cbegin(), second.cend(), std::back_inserter(result));
std::copy(third.cbegin(), third.cend(), std::back_inserter(result));