In C++ there are several ways to join two arrays. The first way is to use the copy function of the C++ standard library.
#include <iostream>
using namespace std;
int main() {
int firstArray[] = {1, 2, 3, 4, 5};
int secondArray[] = {6, 7, 8, 9, 10};
int l1 = end(firstArray) - begin(firstArray);
int l2 = end(secondArray) - begin(secondArray);
int joinedArray[l1 + l2];
std::copy(firstArray, firstArray + l1, joinedArray);
std::copy(secondArray, secondArray + l2, joinedArray + l1);
for (int i = 0; i < l1 + l2; i++) {
std::cout << joinedArray[i] << ' ';
}
return 0;
}
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