For this C$++$ Pointers and Structures Activity Show me the code for this question and explain the process:

PROBLEM $2$

Write a function that accepts an int array and the array"s size as arguments. The function should create a new array that is twice the size of the argument array. The function should copy the contentsa of the argument array to the new array and initialize the unused elments of the second array with $0.$ The functin should return a pointer to the new array.