Write a recursive function named printStars which receives an int parameter.  If the parameter is positive, the function prints the given number of asterisks; otherwise the function does nothing.  The function does not return a value.  Thus, if the printStars(8) is called, ******** (8 asterisks) will be printed.  The function must not use a loop of any kind to accomplish its job.  Instead, it gets the job done by (recursively) calling itself.

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