In C$++$

Write a recursive function that takes as a parameter a nonnegative integer

and generates the following pattern of stars. If the nonnegative integer is $4,$

the pattern generated is as follows:

$**$

$**$

Also, write a program that prompts the user to enter the number of lines in

the pattern and uses the recursive function to generate the pattern. For

example, specifying $4$ as the number of lines generates the preceding pattern.