append two vectors c++ code example

Example 1: vector concat c++

vector1.insert( vector1.end(), vector2.begin(), vector2.end() );

Example 2: how to append one vector to another c++

vector<int> a;
vector<int> b;
// Appending the integers of b to the end of a 
a.insert(a.end(), b.begin(), b.end());

Example 3: how to append two vectors in c++

std::vector<int> AB = A;
AB.insert(AB.end(), B.begin(), B.end());