My Programming Lab - C++

The elements of an integer-valued array can be initialized so that a[i] == i in a recursive fashion as follows:

An array of size 0 is already initialized;

Otherwise

set the last element of the array to n-1 (where n is the number of elements in the array, for example, an array of size 3 will have its last element -- index 2-- set to 2; and

initialize the portion of the array consisting of the first n-1 elements (i.e., the other elements of the array)

Write a void function named init that accepts an integer array, and the number of elements in the array and recursively initializes the array so that a[i] == i.