P$7.$ Write a $C++$ function that takes as an argument an ofstream object that is passed by reference.

You can assume that the object was created by P$6$ and already has a file opened that has been

verified to be open. In the function, use the ofstream object to read an integer. This integer is the

length of the array to be read in$.$ Dynamically create an array of doubles with this length. Then,

read in the values of the array from the file. The function will return to the user a pointer to the

array just created and the length of the array.