1) Write a recursive function that prints out a string vertically:

$ ./a.out
Enter a string: hello
h
e
l
l
o


2) Write a recursive function called mystery() that is defined as:

               _____
mystery(m,n) ==|
               | n + 1                          if m == 0
               | mystery(m-1,1)                 if m > 0 and n == 0
               | mystery(m-1,mystery(m,n-1))    if m > 0 and n > 0
               |
               -----

Larger numbers take a long time to compute!

Example output:

[jlevy@venus hw9]$ ./a.out 
enter 2 numbers: 2 4
11
[jlevy@venus hw9]$ ./a.out 
enter 2 numbers: 3 4
125


Extra:

3) Calculate mystery(1,2) by hand [on paper or typed up].