C++ concatenate two int arrays into one larger array

Question

Is there a way to take two int arrays in C++

int * arr1;
int * arr2;
//pretend that in the lines below, we fill these two arrays with different
//int values
         


        

Answer 1

Another alternative is to use expression templates and pretend the two are concatenated (lazy evaluation). Some links (you can do additional googling):

http://www10.informatik.uni-erlangen.de/~pflaum/pflaum/ProSeminar/ http://www.altdevblogaday.com/2012/01/23/abusing-c-with-expression-templates/ http://aszt.inf.elte.hu/~gsd/halado_cpp/ch06s06.html

If you are looking for ease of use, try:

#include 
#include 

int main()
{
  int arr1[] = {1, 2, 3};
  int arr2[] = {3, 4, 6};

  std::basic_string s1(arr1, 3);
  std::basic_string s2(arr2, 3);

  std::basic_string concat(s1 + s2);

  for (std::basic_string::const_iterator i(concat.begin());
    i != concat.end();
    ++i)
  {
    std::cout << *i << " ";
  }

  std::cout << std::endl;

  return 0;
}